A high entropy polymer alloy and preparation method thereof

Abstract

The present invention relates to a high-entropy polymer alloy and a preparation method thereof. The method comprises the following steps: uniformly mixing polyolefin, polyamide, polyester, thermoplastic elastomer, styrene resin and a compatibilizer to obtain a mixed system; the compatibilizer is one or more of maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer, maleic anhydride grafted polypropylene and maleic anhydride grafted polyethylene; and then melt blending is performed in an internal mixer or extruder at a temperature of 150 to 300° C. and a rotation speed of 40 to 260 r / min to obtain a high-entropy polymer alloy. The present invention provides a novel method for preparing a high-entropy polymer alloy, wherein the prepared alloy has excellent mechanical properties such as toughness and strength, and at the same time provides a new method and idea for plastic recycling, i.e., recycled plastics can be reused by preparing a high-entropy (multi-component) plastic alloy without sorting or after simple sorting.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer blending, and in particular relates to a high-entropy polymer alloy and a preparation method thereof. Background Art

[0002] Entropy represents the degree of disorder in a system. "High entropy" is a new material design theory that has emerged in recent years and has become a cutting-edge field in materials research. The entropy in high-entropy materials comes from the configurational entropy of solid solutions, and high entropy actually reflects the characteristics of a material with a wide variety of elements and close mixing ratios.

[0003] High-entropy alloys (HEAs) are alloys composed of five or more dominant elements, with each element containing between 5% and 35%. With the rapid development of HEAs, researchers have also applied the concept of high entropy to the design and development of ceramic materials, leading to the emergence of high-entropy ceramics. HEA ceramics are typically single-phase ceramics composed of four or more metallic elements in equal or near-equal proportions combined with several non-metallic elements.

[0004] Currently, polymer materials play a key role in various fields, from social livelihoods to national defense and military industry. However, traditional single polymer materials have performance and diversity limitations in certain aspects. High-entropy materials have attracted widespread attention as a new material design model. Materials such as high-entropy alloys and high-entropy ceramics have made significant progress in the field of materials science due to their unique structures and properties. The design concept of high-entropy materials improves the diversity, stability and performance of materials by introducing multiple dominant elements and maintaining their relatively uniform distribution. However, there are currently no reports on research on high-entropy polymer alloys.

[0005] In summary, it is very necessary to provide a high entropy polymer alloy and a preparation method thereof. Summary of the Invention

[0006] To address one or more of the problems in the prior art, such as the inadequate performance of single-, two-, and three-component polymers, and the inefficiency and high cost of plastic recycling, the present invention provides a high-entropy polymer alloy and a method for preparing the same. The present invention pioneers a high-entropy polymer alloy and a method for preparing the same. The method is simple, and the resulting alloy exhibits excellent mechanical properties, such as toughness and strength. It also provides a new approach and concept for plastic recycling, enabling the reuse of recycled plastics by preparing a high-entropy (multi-component) plastic alloy without or after simple sorting.

[0007] In a first aspect, the present invention provides a method for preparing a high entropy polymer alloy, the method comprising the following steps:

[0008] (1) uniformly mixing polyolefin, polyamide, polyester, thermoplastic elastomer, styrene resin and compatibilizer to obtain a mixed system; the compatibilizer is one or more of maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer, maleic anhydride grafted styrene-butadiene-styrene block copolymer, maleic anhydride grafted polypropylene, maleic anhydride grafted polyethylene, glycidyl methacrylate grafted styrene-ethylene-butylene-styrene block copolymer, glycidyl methacrylate grafted styrene-butadiene-styrene block copolymer, glycidyl methacrylate grafted polypropylene, and glycidyl methacrylate grafted polyethylene;

[0009] (2) The mixed system is melt-blended in an internal mixer or an extruder at a temperature of 150 to 300° C. and a rotation speed of 40 to 260 r / min to prepare a high entropy polymer alloy.

[0010] Preferably, the mixed system consists of 0-60% polyolefin, 0-60% polyamide, 0-60% polyester, 0-60% thermoplastic elastomer, 0-60% styrene resin and 0-30% compatibilizer in mass percentage, and the sum of the mass percentages of each component is 100%.

[0011] Preferably, the mixed system consists of 15-25% polyolefin, 15-25% polyamide, 15-25% polyester, 15-25% thermoplastic elastomer, 15-25% styrene resin and 0-25% compatibilizer in mass percentage, and the sum of the mass percentages of each component is 100%.

[0012] Preferably, in the mixed system, the mass ratio of polyolefin, polyamide, polyester and styrene resin is 1:1:1:1, and the mass ratio of the sum of the mass of the thermoplastic elastomer and the compatibilizer to the polyolefin is 1:1.

[0013] Preferably, the mass ratio of the thermoplastic elastomer to the compatibilizer is (0.3-3):1.

[0014] Preferably, the polyolefin is one or more of polyethylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, and polypropylene; the polyamide is one or more of polyamide-6, polyamide-11, polyamide-12, polyamide-66, polyamide-610, and polyamide-612; the polyester is one or more of polylactic acid, polyethylene terephthalate, polybutylene terephthalate, polybutylene terephthalate adipate, polycaprolactone, polybutylene succinate, and polycarbonate; the thermoplastic elastomer is styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, styrene-isoprene-styrene block copolymer, hydrogenated styrene-isoprene- One or more of styrene block copolymers; and / or the styrene resin is one or more of polystyrene, styrene-acrylonitrile copolymer, acrylonitrile-butadiene-styrene copolymer, and high impact polystyrene; the compatibilizer is one or more of maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer, maleic anhydride grafted styrene-butadiene-styrene block copolymer, maleic anhydride grafted polypropylene, maleic anhydride grafted polyethylene, glycidyl methacrylate grafted styrene-ethylene-butylene-styrene block copolymer, glycidyl methacrylate grafted styrene-butadiene-styrene block copolymer, glycidyl methacrylate grafted polypropylene, and glycidyl methacrylate grafted polyethylene.

[0015] Preferably, the polyolefin is polypropylene; the polyamide is polyamide-6; the polyester is polylactic acid; the thermoplastic elastomer is styrene-ethylene-butylene-styrene block copolymer; the styrene resin is polystyrene; and the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer.

[0016] Preferably, the polyolefin is recycled polypropylene; the polyamide is recycled polyamide-6; the polyester is recycled polylactic acid; the thermoplastic elastomer is recycled styrene-ethylene-butylene-styrene block copolymer; the styrene resin is recycled polystyrene; and the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer.

[0017] Preferably, the polyolefin is polypropylene and / or recycled polypropylene; the polyamide is polyamide-6 and / or recycled polyamide-6; the polyester is polylactic acid and / or recycled polylactic acid; the thermoplastic elastomer is styrene-ethylene-butylene-styrene block copolymer and / or recycled styrene-ethylene-butylene-styrene block copolymer; the styrene resin is polystyrene and / or recycled polystyrene; and the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer.

[0018] In a second aspect, the present invention provides a high entropy polymer alloy prepared by the preparation method described in the first aspect of the present invention.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] (1) This invention prepares high-entropy polymer alloys using polyolefins, polyamides, polyesters, thermoplastic elastomers, styrene resins, and compatibilizers as raw materials. By using the compatibilizer to modify the composite system, the toughness and strength of the prepared alloys are enhanced, and their overall mechanical properties are improved. Compared with single-component polymers or polymer alloys composed of two or three components, the high-entropy polymer alloys have more balanced overall mechanical properties.

[0021] (2) Conventional polymer alloys are typically composed of two or three components, one of which is a matrix phase and the others are dispersed phases. The resulting alloy primarily exhibits the mechanical properties of the matrix phase. In the present invention, the five components, polyolefin, polyamide, polyester, thermoplastic elastomer, and styrene resin, are formulated in the same or similar proportions. The resulting alloy combines the mechanical properties of these five components, resulting in superior overall performance.

[0022] (3) Conventional compatibilizers can usually only be used to compatibilize two-component polymers. The compatibilizer used in the present invention achieves simultaneous compatibilization of a five-component polymer blend. Since the added compatibilizer contains anhydride and / or epoxy groups, it can enhance the interaction between it and polar components such as polyamide and polyester in the blend, thereby achieving a compatibilization effect; at the same time, the compatibilizer contains styrene groups, which can enhance the interaction between it and the styrene resin component in the blend, thereby achieving a compatibilization effect; in addition, the compatibilizer also contains ethylene-butene groups, which can enhance the interaction between it and the polyolefin resin component in the blend, thereby achieving a compatibilization effect; therefore, the compatibilizer used in the present invention can simultaneously achieve the compatibilization of the five-component blend, thereby enhancing the toughness and strength of the prepared high-entropy polymer alloy, and effectively improving the comprehensive mechanical properties.

[0023] (4) Recycled plastics usually contain multiple plastic components, and sorting is time-consuming and labor-intensive, resulting in a low reuse rate of recycled plastics. The high-entropy polymer alloy of the present invention and its preparation method are expected to solve the problem of reuse of multi-component recycled plastic mixtures. Under the concept of preparing high-entropy polymer alloys of the present invention, by adding a high-efficiency compatibilizer to the recycled plastic mixture, the capacity between different plastic components is increased, and the mechanical properties of the blend are improved, so that the recycled plastics can be recycled and reused without sorting or after only simple sorting. This greatly reduces the resource consumption in the sorting process, simplifies the recycling process and reduces the cost of recycling and reuse, and is expected to increase the reuse rate of recycled plastics. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a freeze-quenched surface morphology image (SEM image) of the high-entropy polymer alloy prepared in Example 1 of the present invention;

[0025] Figure 2 This is a freeze-quenched surface morphology image (SEM image) of the high-entropy polymer alloy prepared in Example 4 of the present invention;

[0026] Figure 3 This is a freeze-quenched surface morphology image (SEM image) of the high-entropy polymer alloy prepared in Example 6 of the present invention. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The present invention premixes various raw materials and then blends them in an internal mixer to obtain a high-entropy polymer alloy. The present invention adds a compatibilizer, and the mechanical properties such as toughness and strength of the prepared alloy are improved, providing a new method for plastic recycling and reuse, that is, recycled plastics can be reused by preparing high-entropy plastic alloys without sorting or after only simple sorting.

[0029] In a first aspect, the present invention provides a method for preparing a high entropy polymer alloy, the method comprising the following steps:

[0030] (1) polyolefin, polyamide, polyester, thermoplastic elastomer, styrene resin and compatibilizer are uniformly mixed to obtain a mixed system; specifically, for example, polyolefin, polyamide, polyester, thermoplastic elastomer, styrene resin and compatibilizer are uniformly mixed (premixed) by a high-speed mixer to obtain a mixed system; the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH), maleic anhydride grafted styrene-butadiene-styrene block copolymer (SBS-g-MAH), maleic anhydride grafted polypropylene (PP-g-MAH), maleic anhydride grafted One or more of anhydride grafted polyethylene (PE-g-MAH), glycidyl methacrylate grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-GMA), glycidyl methacrylate grafted styrene-butadiene-styrene block copolymer (SBS-g-GMA), glycidyl methacrylate grafted polypropylene (PP-g-GMA), and glycidyl methacrylate grafted polyethylene (PE-g-GMA); the maleic anhydride grafted polyethylene is, for example, maleic anhydride grafted high-density polyethylene (HDPE-g-MAH);

[0031] (2) the mixed system obtained in step (1) is heated at a temperature of 150 to 300° C. (e.g., 150° C., 160° C., 170° C., 180° C., 190° C., 200° C., 210° C., 220° C., 230° C., 240° C., 250° C., 260° C., 270° C., 280° C., 290° C. or 300° C.) and a rotation speed of 40 to 260 r / min (e.g., 40, 50, 60, 70 The high entropy polymer alloy is prepared by melt blending in an internal mixer or extruder at a speed of 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500 or 260r / min) for 7 to 15 minutes (for example, 7, 8, 9, 10, 11, 12, 13, 14 or 15 minutes).

[0032] The present invention prepares a high-entropy polymer alloy material using polyolefin, polyamide, polyester, thermoplastic elastomer, styrene resin, and a compatibilizer as raw materials. The compatibilizer is then used to increase the compatibilization of the mixed system. The added compatibilizer contains anhydride and / or epoxy groups, which enhance its interaction with the polyamide and polyester; the styrene block enhances its interaction with the styrene resin; and the ethylene-butylene block enhances its interaction with the polyolefin. This simultaneously increases the compatibilization of the five components, resulting in enhanced toughness and strength of the resulting polymer alloy, improving its overall mechanical properties.

[0033] The present invention provides a high-entropy polymer alloy and a preparation method thereof, as well as a method for modifying the high-entropy polymer alloy. The process is simple and efficient, and the toughness and strength of the material are improved. At the same time, a new method is provided for the recycling and reuse of multi-component waste plastics. As is well known, recycled plastics usually contain multiple plastic components, and sorting is time-consuming and labor-intensive, resulting in a relatively low reuse rate of recycled plastics. The high-entropy polymer alloy of the present invention and the preparation method thereof are expected to solve the problem of reuse of multi-component recycled plastic mixtures. By adding an efficient compatibilizer to the recycled plastic mixture, the compatibilization between different plastic components is achieved, and the mechanical properties of the blend are improved. As a result, the recycled plastics can be recycled and reused without sorting or after only simple sorting, which greatly reduces the resource consumption in the sorting process, simplifies the recycling process, reduces the cost of recycling and reuse, and is expected to increase the reuse rate of recycled plastics.

[0034] The performance advantage of the high entropy polymer alloy prepared by the present invention is mainly reflected in its ability to achieve diversity and balance of various properties in material design; compared with single-component polymers or polymer alloys composed of 2 to 3 components, the high entropy polymer alloy prepared by the present invention has more balanced comprehensive mechanical properties; traditional polymer alloys are usually composed of two to three components, one component is the matrix phase, and the others are all dispersed phases, and the resulting alloy mainly reflects the mechanical properties of the matrix phase. In the present invention, the five components of polyolefin, polyamide, polyester, thermoplastic elastomer, and styrene resin are the same or similar in proportion, and the resulting alloy combines the mechanical properties of the five components, so the comprehensive performance is better; traditional compatibilizers can usually only be used to compatibilize two-component polymers. The compatibilizer used in the present invention achieves simultaneous compatibilization of the five-component polymer blend. Since the added compatibilizer contains anhydride and / or epoxy groups, its interaction with polar components such as polyamide and polyester in the blend can be enhanced, thereby achieving a compatibilization effect; at the same time, the compatibilizer contains a styrene block, which can enhance its interaction with the styrene resin component in the blend, thereby achieving a compatibilization effect; the compatibilizer also contains an ethylene-butylene block, which can enhance its interaction with the polyolefin resin component in the blend, thereby achieving a compatibilization effect; therefore, the compatibilizer used in the present invention can simultaneously achieve compatibilization of the five-component blend, thereby enhancing the toughness and strength of the prepared polymer alloy, and effectively improving the comprehensive mechanical properties.

[0035] According to some preferred embodiments, the mixed system is composed of 0-60% polyolefin, 0-60% polyamide, 0-60% polyester, 0-60% thermoplastic elastomer, 0-60% styrene resin and 0-30% compatibilizer in mass percentage, and the sum of the mass percentages of each component is 100%.

[0036] According to some preferred embodiments, the mixed system is composed of 0-25% (e.g., 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%) of polyolefin by mass percentage, 0-25% (e.g., 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%) of polyamide by mass percentage. 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, or 25%), polyester 0-25% (e.g., 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, or 25%) , thermoplastic elastomer 0-25% (e.g., 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%), styrene resin 0-25% (e.g., 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%) , 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%) and 0-25% (for example, 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%) of a compatibilizer, and the sum of the mass percentages of each component is 100%.

[0037] According to some preferred embodiments, the mixed system consists of 15-25% (e.g., 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%) of polyolefin, 15-25% (e.g., 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%) of polyamide, 15-25% (e.g., 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%) of polyester, 15-25% (e.g., 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%) of thermoplastic elastomer,

[0038] 1% , 2% , 3% , 4% , 5% , 6% , 7% , 8% , 9% , 10% , 11% , 12% , 13% , 14% , 15% , 16% , 17% , 18% , 19% , 20% , 21% , 22% , 23% , 24% or 25% ), 15-25% (e.g. 15%, 16%, 17%, 18% , 19% , 20% , 21% , 22% , 23% , 24% or 25%) of styrene resin and 0-25% (e.g. 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8% , 9% , 10% , 11% , 12% , 13% , 14% , 15% , 16% , 17% , 18% , 19% , 20% , 21% , 22% , 23% , 24% or 25%) of compatibilizer, and the sum of the mass percentages of each component is 100%.

[0039] According to some preferred embodiments, in the mixed system, the mass ratio of polyolefin, polyamide, polyester and styrene resin is 1:1:1:1, and the mass ratio of the sum of the mass of the thermoplastic elastomer and the compatibilizer to the polyolefin is 1:1; preferably, the mass ratio of the thermoplastic elastomer to the compatibilizer is (0.3-3):1 (for example, 0.3:1, 0.5:1, 1:1, 1.5:1, 2:1, 2.5:1 or 3:1).

[0040] In the present invention, preferably, in the mixed system, the mass ratio of polyolefin, polyamide, polyester and styrene resin is 1:1:1:1, and the mass ratio of the sum of the mass of the thermoplastic elastomer and the compatibilizer to the polyolefin is 1:1. The present invention finds that the selection of this ratio is more conducive to ensuring the acquisition of the high entropy polymer alloy material with the best balance of strength and toughness performance than the mixed system formed under other mass ratios.

[0041] According to some preferred embodiments, the mixed system consists of 20% polyolefin, 20% polyamide, 20% polyester, 3-10% thermoplastic elastomer, 20% styrene resin and 10-17% compatibilizer in mass percentage, and the sum of the mass percentages of each component is 100%.

[0042] According to some preferred embodiments, the polyolefin is one or more of polyethylene (PE), high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and polypropylene (PP); the polyamide is one or more of polyamide-6 (PA6), polyamide-11 (PA11), polyamide-12 (PA12), polyamide-66 (PA66), polyamide-610 (PA610), and polyamide-612 (PA612); the polyester is one or more of polylactic acid (PLA), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polybutylene terephthalate adipate (PBAT), polycaprolactone (PCL), polybutylene succinate (PBS), and polycarbonate (PC); the thermoplastic elastomer is one or more of styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-isoprene-styrene block copolymer (SIS), hydrogenated styrene One or more of ethylene-isoprene-styrene block copolymers (SEPS); the styrene resin is one or more of polystyrene (PS), styrene-acrylonitrile copolymer (AS), acrylonitrile-butadiene-styrene copolymer (ABS), and high-impact polystyrene (HIPS); the compatibilizer is one or more of maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH), maleic anhydride grafted styrene-butadiene-styrene block copolymer (SBS-g-MAH), maleic anhydride grafted polypropylene (PP-g-MAH), maleic anhydride grafted polyethylene (PE-g-MAH), glycidyl methacrylate grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-GMA), glycidyl methacrylate grafted styrene-butadiene-styrene block copolymer (SBS-g-GMA), glycidyl methacrylate grafted polypropylene (PP-g-GMA), and glycidyl methacrylate grafted polyethylene (PE-g-GMA).

[0043] According to some preferred embodiments, the polyolefin is polypropylene; the polyamide is polyamide-6; the polyester is polylactic acid; the thermoplastic elastomer is styrene-ethylene-butylene-styrene block copolymer; the styrene resin is polystyrene; and the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH). The present invention has found that the selection of these raw materials is conducive to ensuring that the high entropy polymer alloy material with the best balance of properties such as strength and toughness is obtained. The lack of any component will significantly affect the strength and / or toughness of the high entropy polymer alloy material. The high entropy polymer alloy obtained by the reasonable selection and combination of different polymer components and compatibilizers in the present invention can achieve an excellent performance combination. For example, the strength, hardness, toughness and other properties of the material can be improved at the same time, which helps to improve the fatigue resistance and durability of the material. Moreover, by optimizing the mixing ratio of each raw material, a high entropy polymer alloy with better toughness can be obtained. In addition, since the five components of the high-entropy polymer alloy, such as polyolefins, polyamides, polyesters, thermoplastic elastomers, and styrene resins, represent the vast majority of types of plastics used in daily life today, that is, the vast majority of plastic types in recycled plastic mixtures, the high-entropy polymer alloy and its preparation method provide a new solution for recycling and reusing plastics; that is, the recycled plastic mixture can be reused by preparing a high-entropy (multi-component) polymer alloy without sorting or after only simple sorting.

[0044] According to some preferred embodiments, the polyolefin is recycled polypropylene; the polyamide is recycled polyamide-6; the polyester is recycled polylactic acid; the thermoplastic elastomer is recycled styrene-ethylene-butylene-styrene block copolymer; the styrene resin is recycled polystyrene; and the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer.

[0045] According to some preferred embodiments, the polyamide is polyamide-6 and / or recycled polyamide-6; the polyester is polylactic acid and / or recycled polylactic acid; the thermoplastic elastomer is styrene-ethylene-butylene-styrene block copolymer and / or recycled styrene-ethylene-butylene-styrene block copolymer; the styrene resin is polystyrene and / or recycled polystyrene; and the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer.

[0046] According to some preferred embodiments, the polyolefin is a mixture of polypropylene and recycled polypropylene; the polyamide is a mixture of polyamide-6 and recycled polyamide-6; the polyester is a mixture of polylactic acid and recycled polylactic acid; the thermoplastic elastomer is a mixture of styrene-ethylene-butylene-styrene block copolymer and recycled styrene-ethylene-butylene-styrene block copolymer; the styrene resin is a mixture of polystyrene and recycled polystyrene; and the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer.

[0047] The present invention finds that only when none of the six components, namely, the polyolefin, the polyamide, the polyester, the thermoplastic elastomer, the styrene resin, and the compatibilizer, are missing, can a high-entropy polymer alloy material with balanced performance be obtained; when recycled polypropylene (waste polypropylene products) is used as the polypropylene component, recycled polyamide-6 (waste polyamide-6 products) is used as the polyamide component, recycled polylactic acid (waste polylactic acid products) is used as the polylactic acid component, recycled styrene-ethylene-butylene-styrene block copolymer (waste styrene-ethylene-butylene-styrene block copolymer products) is used as the styrene-ethylene-butylene-styrene block copolymer component, and recycled polystyrene (waste polystyrene products) is used as the polystyrene blending component, a high-entropy polymer alloy material with balanced performance can be obtained. A significantly improved high-entropy polymer alloy material; when a mixture of polypropylene and recycled polypropylene (waste polypropylene products) is used as the polypropylene component, a mixture of polyamide-6 and recycled polyamide-6 (waste polyamide-6 products) is used as the polyamide component, a mixture of polylactic acid and recycled polylactic acid (waste polylactic acid products) is used as the polylactic acid component, a mixture of styrene-ethylene-butylene-styrene block copolymer and recycled styrene-ethylene-butylene-styrene block copolymer (waste styrene-ethylene-butylene-styrene block copolymer products) is used as the styrene-ethylene-butylene-styrene block copolymer component, and a mixture of polystyrene and recycled polystyrene (waste polystyrene products) is used as the polystyrene blending component, a high-entropy polymer alloy material with significantly improved performance can be obtained.

[0048] According to some preferred embodiments, the mixed system is composed of 20% polypropylene, 20% polyamide-6, 20% polylactic acid, 3-10% styrene-ethylene-butylene-styrene block copolymer, 20% polystyrene and 10-17% maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer in mass percentage, and the sum of the mass percentages of each component is 100%.

[0049] In a second aspect, the present invention provides a high entropy polymer alloy prepared by the preparation method described in the first aspect of the present invention.

[0050] The present invention will be further described below by way of examples, but the scope of protection of the present invention is not limited to these embodiments. The present invention may also have various other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformations shall all fall within the scope of protection of the claims attached to the present invention. The experimental methods used in the following examples are all conventional methods unless otherwise specified. The materials used in the following examples, etc., unless otherwise specified, can be obtained from commercial channels or prepared by existing methods or are recycled waste plastic products.

[0051] Example 1

[0052] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS) and polystyrene (PS) are uniformly mixed to obtain a mixed system; the weight proportion of each component is 20% PP, 20% PA6, 20% PLA, 20% SEBS and 20% PS.

[0053] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0054] Example 2

[0055] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS), polystyrene (PS) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 20% PP, 20% PA6, 20% PLA, 15% SEBS, 5% SEBS-g-MAH and 20% PS.

[0056] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0057] Example 3

[0058] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS), polystyrene (PS) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 20% PP, 20% PA6, 20% PLA, 10% SEBS, 10% SEBS-g-MAH and 20% PS.

[0059] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0060] Example 4

[0061] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS), polystyrene (PS) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 20% PP, 20% PA6, 20% PLA, 5% SEBS, 15% SEBS-g-MAH and 20% PS.

[0062] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0063] Example 5

[0064] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS), polystyrene (PS) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 20% PP, 20% PA6, 20% PLA, 3% SEBS, 17% SEBS-g-MAH and 20% PS.

[0065] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0066] Example 6

[0067] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), polystyrene (PS) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) were uniformly mixed to obtain a mixed system; the mass proportion of each component was 20% PP, 20% PA6, 20% PLA, 20% SEBS-g-MAH, and 20% PS.

[0068] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0069] Example 7

[0070] (1) Recycled polypropylene (recycled PP products), recycled polyamide-6 (recycled PA6 products), recycled polylactic acid (recycled PLA products), recycled styrene-ethylene-butylene-styrene block copolymer (recycled SEBS products), recycled polystyrene (recycled PS products) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 20% recycled PP, 20% recycled PA6, 20% recycled PLA, 5% recycled SEBS, 15% SEBS-g-MAH and 20% recycled PS.

[0071] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0072] Example 8

[0073] (1) Recycled polypropylene (recycled PP products) and a mixture of polypropylene (PP), recycled polyamide-6 (recycled PA6 products) and a mixture of polyamide-6 (PA6), recycled polylactic acid (recycled PLA products) and a mixture of polylactic acid (PLA), recycled styrene-ethylene-butylene-styrene block copolymer (recycled SEBS products) and a mixture of styrene-ethylene-butylene-styrene block copolymer (SEBS), recycled polystyrene (recycled PS products) and a mixture of polystyrene (PS) and maleic anhydride grafted styrene-ethylene -Butene-styrene block copolymer (SEBS-g-MAH) is mixed evenly to obtain a mixed system; the mass proportion of each component is 20% PP (of which recycled PP and PP each account for 10%), 20% PA6 (of which recycled PA6 and PA6 each account for 10%), 20% PLA (of which recycled PLA and PLA each account for 10%), 5% SEBS (of which recycled SEBS and SEBS each account for 2.5%), 15% SEBS-g-MAH, and 20% PS (of which recycled PS and PS each account for 10%).

[0074] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0075] Comparative Example 1

[0076] (1) High-density polyethylene (HDPE), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS) and polystyrene (PS) are uniformly mixed to obtain a mixed system; the mass proportion of each component is 20% of HDPE, 20% of PA6, 20% of PLA, 20% of SEBS, and 20% of PS.

[0077] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0078] Comparative Example 2

[0079] (1) High-density polyethylene (HDPE), polyamide-6 (PA6), polylactic acid (PLA), maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) and polystyrene (PS) were uniformly mixed to obtain a mixed system; the mass proportion of each component was 20% HDPE, 20% PA6, 20% PLA, 20% SEBS-g-MAH and 20% PS.

[0080] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0081] Comparative Example 3

[0082] (1) Polypropylene (PP), polyamide-6 (PA6), polymethyl methacrylate (PMMA), styrene-ethylene-butylene-styrene block copolymer (SEBS) and polystyrene (PS) are uniformly mixed to obtain a mixed system; the mass proportion of each component is 20% PP, 20% PA6, 20% PMMA, 20% SEBS and 20% PS.

[0083] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0084] Comparative Example 4

[0085] (1) Polypropylene (PP), polyamide-6 (PA6), polymethyl methacrylate (PMMA), maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) and polystyrene (PS) were uniformly mixed to obtain a mixed system; the weight proportion of each component was 20% PP, 20% PA6, 20% PMMA, 20% SEBS-g-MAH and 20% PS.

[0086] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0087] Comparative Example 5

[0088] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS) and polystyrene (PS) were uniformly mixed to obtain a mixed system; the weight proportions of each component were 17% PP, 20% PA6, 20% PLA, 20% SEBS and 23% PS.

[0089] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0090] Comparative Example 6

[0091] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS), maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) and polystyrene (PS) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 17% PP, 20% PA6, 20% PLA, 5% SEBS, 15% SEBS-g-MAH and 23% PS.

[0092] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0093] Comparative Example 7

[0094] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) and polystyrene (PS) were uniformly mixed to obtain a mixed system; the weight proportions of each component were 17% PP, 20% PA6, 20% PLA, 20% SEBS-g-MAH and 23% PS.

[0095] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0096] Comparative Example 8

[0097] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS) and polystyrene (PS) are uniformly mixed to obtain a mixed system; the weight proportion of each component is 15% PP, 20% PA6, 20% PLA, 20% SEBS and 25% PS.

[0098] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0099] Comparative Example 9

[0100] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS), maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) and polystyrene (PS) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 15% PP, 20% PA6, 20% PLA, 5% SEBS, 15% SEBS-g-MAH and 25% PS.

[0101] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0102] Comparative Example 10

[0103] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) and polystyrene (PS) were uniformly mixed to obtain a mixed system; the weight proportion of each component was 15% PP, 20% PA6, 20% PLA, 20% SEBS-g-MAH and 25% PS.

[0104] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0105] Comparative Example 11

[0106] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS) and polystyrene (PS) are uniformly mixed to obtain a mixed system; the weight proportion of each component is 20% PP, 25% PA6, 15% PLA, 20% SEBS and 20% PS.

[0107] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0108] Comparative Example 12

[0109] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) and polystyrene (PS) were uniformly mixed to obtain a mixed system; the weight proportion of each component was 20% PP, 25% PA6, 15% PLA, 20% SEBS-g-MAH and 20% PS.

[0110] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0111] Comparative Example 13

[0112] (1) Recycled polypropylene (recycled PP products), recycled polyamide-6 (recycled PA6 products), recycled polylactic acid (recycled PLA products), recycled styrene-ethylene-butylene-styrene block copolymer (recycled SEBS products) and recycled polystyrene (recycled PS products) are mixed uniformly to obtain a mixed system; the mass proportion of each component is 20% recycled PP, 20% recycled PA6, 20% recycled PLA, 20% SEBS, and 20% recycled PS.

[0113] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0114] Comparative Example 14

[0115] (1) Recycled polypropylene (recycled PP products), recycled polyamide-6 (recycled PA6 products), recycled polylactic acid (recycled PLA products), recycled polystyrene (recycled PS products) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) are mixed evenly to obtain a mixed system; the mass proportion of each component is 20% recycled PP, 20% recycled PA6, 20% recycled PLA, 20% SEBS-g-MAH, and 20% recycled PS.

[0116] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0117] Comparative Example 15

[0118] (1) High-density polyethylene (HDPE), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS), polystyrene (PS) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 20% HDPE, 20% PA6, 20% PLA, 5% SEBS, 15% SEBS-g-MAH and 20% PS.

[0119] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0120] Comparative Example 16

[0121] (1) Polypropylene (PP), polyamide-6 (PA6), polylactic acid (PLA), styrene-ethylene-butylene-styrene block copolymer (SEBS), polystyrene (PS) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) were mixed uniformly to obtain a mixed system; the mass proportion of each component was 20% PP, 25% PA6, 15% PLA, 5% SEBS, 15% SEBS-g-MAH and 20% PS.

[0122] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0123] Comparative Example 17

[0124] (1) A mixture of recycled polypropylene (recycled PP products) and polypropylene (PP), a mixture of recycled polyamide-6 (recycled PA6 products) and polyamide-6 (PA6), a mixture of recycled polylactic acid (recycled PLA products) and polylactic acid (PLA), a mixture of recycled styrene-ethylene-butylene-styrene block copolymer (recycled SEBS products) and styrene-ethylene-butylene-styrene block copolymer (SEBS), and a mixture of recycled polystyrene (recycled PS products) and polystyrene (PS) are uniformly mixed to obtain a mixed system; the mass proportion of each component is 20% PP (of which recycled PP and PP each account for 10%), 20% PA6 (of which recycled PA6 and PA6 each account for 10%), 20% PLA (of which recycled PLA and PLA each account for 10%), 20% SEBS (of which recycled SEBS and SEBS each account for 10%), and 20% PS (of which recycled PS and PS each account for 10%).

[0125] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0126] Comparative Example 18

[0127] (1) A mixture of recycled polypropylene (recycled PP products) and polypropylene (PP), a mixture of recycled polyamide-6 (recycled PA6 products) and polyamide-6 (PA6), a mixture of recycled polylactic acid (recycled PLA products) and polylactic acid (PLA), a mixture of recycled polystyrene (recycled PS products) and polystyrene (PS) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MAH) are mixed uniformly to obtain a mixed system; the mass proportion of each component is 20% PP (of which recycled PP and PP each account for 10%), 20% PA6 (of which recycled PA6 and PA6 each account for 10%), 20% PLA (of which recycled PLA and PLA each account for 10%), 20% SEBS-g-MAH, and 20% PS (of which recycled PS and PS each account for 10%).

[0128] (2) The mixed system was melt-blended in an internal mixer at a temperature of 230°C and a rotation speed of 60 r / min for 10 min to prepare a high entropy polymer alloy.

[0129] The high-entropy polymer alloy materials prepared in each embodiment and each comparative example of the present invention were subjected to mechanical property testing. The method for conducting the mechanical property testing of the present invention is as follows: the high-entropy polymer alloy material was prepared into a standard tensile specimen at 230° C. using a hot press (MP-SCL), and the mechanical properties of the prepared specimens were tested on an Instron 3345 tensile tester. The results of the Young's modulus and elongation at break are shown in Table 1, wherein the sample size was 28 mm (length) × 4 mm (width) × 2.5 mm (thickness), and the tensile rate was 50 mm / min.

[0130] Table 1: Comparative properties of high entropy polymer alloys prepared in various embodiments of the present invention and various comparative examples.

[0131]

[0132]

[0133] Table 1 above also provides the Young's modulus and elongation at break data of PLA, PS, SEBS and SEBS-g-MAH used in various embodiments of the present invention and various comparative examples.

[0134] As can be seen from the data in Table 1, by comparing Examples 1, 2, 3, 4, 5, and 6, it can be seen that with the increase of the compatibilizer content, the Young's modulus of the material gradually decreases, while the overall elongation at break shows a trend of first increasing and then decreasing. When the compatibilizer content reaches 15wt%, the elongation at break of the material reaches its maximum value, indicating that the compatibilizer enhances the interaction between the components.

[0135] By comparing Example 1 with Comparative Examples 1 and 3, and Example 6 with Comparative Examples 2 and 4, it can be seen that the high-entropy polymer alloy material prepared by PP blending has better comprehensive mechanical properties than the material prepared by HDPE blending and the material prepared by PMMA blending, that is, PP has better interaction with each component in the entire system.

[0136] Comparison of Examples 1, 4, and 6 with Comparative Examples 5, 6, and 7, as well as Comparative Examples 8, 9, and 10, reveals that as the PS content in the components increases and the PP content decreases, the overall mechanical properties of the material gradually decrease. Simultaneously, the compatibilizing effect of the compatibilizer gradually weakens, with the elongation at break decreasing from 663% to 435%. Comparison of Examples 1 and 6 with Comparative Examples 8, 10, and 11 and 12 reveals that the compatibilizing effect is worse when the components are blended in non-equal proportions than when the components are blended in equal proportions. The comprehensive mechanical properties of the materials obtained from non-equal proportion blends are also worse than when the components are blended in equal proportions, demonstrating the importance of equal proportions.

[0137] Comparing Examples 1 and 6 with Comparative Examples 13 and 14, it can be seen that for the recycled plastic, the addition of a compatibilizer can improve the interaction between the various phases of the material, but the compatibilization effect is poor compared to the original material. The difference between the Young's modulus of the recycled plastic after compatibilization and the modulus of the original plastic is reduced and almost equal. After adding 20wt% of the compatibilizer, the elastic modulus of the material reaches the level of low-density polyethylene, with a certain mechanical strength. At the same time, the fracture productivity reaches about 12%, reaching a medium elongation at break level (1%-50%), and has a certain degree of toughness. As can be seen from the data of Examples 7 and 8 of the present invention, under the concept of preparing high-entropy polymer alloys of the present invention, by adding a compatibilizer to the recycled plastic mixture, the compatibilization between different plastic components can be achieved, thereby improving the mechanical properties of the blend.

[0138] The present invention also observed the freeze-quenching surface morphology of the high entropy polymer alloy materials prepared in Example 1, Example 4 and Example 6, respectively. Figure 1 、 Figure 2 and Figure 3 As shown in the figure, the test method is: using S4700 cold field scanning electron microscope, the scanning voltage is 20kV, and the magnification is 5k. Figure 1 and Figure 2 By comparison, it can be seen that Figure 1 The interface between the smooth area and the rough area is obvious. Figure 2 is relatively fuzzy, indicating that the interaction between the phases has increased. Figure 2 and Figure 3 By comparison, it can be seen that Figure 3 Small and medium-sized dot-like protrusions compared to Figure 2 There is a significant increase compared to Figure 1 It can be seen that the interface also becomes blurred, indicating that the interaction has increased, but for Figure 2 In general, the interfacial adhesion is reduced, resulting in the performance of Example 6 being inferior to that of Example 4.

[0139] Parts of the present invention that are not described in detail are well known to those skilled in the art.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for preparing a high entropy polymer alloy, characterized in that: The method comprises the following steps: (1) Polyolefin, polyamide, polyester, thermoplastic elastomer, styrene resin and compatibilizer are uniformly mixed to obtain a mixed system; the mixed system consists of 20% polyolefin, 20% polyamide, 20% polyester, 5% thermoplastic elastomer, 20% styrene resin and 15% compatibilizer in percentage by mass; the polyolefin is polypropylene, the polyamide is polyamide-6, the polyester is polylactic acid, the thermoplastic elastomer is styrene-ethylene-butylene-styrene block copolymer, the styrene resin is polystyrene, and the compatibilizer is maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer; (2) The mixed system is melt-blended in an internal mixer or extruder at a temperature of 150-300°C and a rotation speed of 40-260 r / min to obtain a high entropy polymer alloy.

2. A high entropy polymer alloy prepared by the preparation method according to claim 1.

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