Anti-ultraviolet aging propylene-butadiene binary co-polypropylene composite material and preparation method thereof

Abstract

According to the invention, the propylene-butadiene binary co-polypropylene grafted with p-hydroxybenzoic acid acrylate and the propylene-butadiene binary co-polypropylene modified with surface modified nano ZnO are blended, so that the surface functionalized modified and nano ZnO hybrid synergistically enhanced ultraviolet aging resistant propylene-butadiene binary co-polypropylene composite material is formed; the ultraviolet absorbance can be reduced by 60%-85% within the ultraviolet wavelength range of 200-400 nm, compared with a traditional method, the ultraviolet resistance is remarkably improved, and the use requirements in outdoor and strong ultraviolet environments can be better met.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to a UV-aging-resistant propylene-butane binary copolymer polypropylene composite material and a preparation method thereof. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] Propylene-butene copolymer (PP) is a thermoplastic resin formed by the polymerization of propylene and butene. Combining the advantages of propylene and butene polymers, it is widely used in packaging, medical treatment, automotive interiors, and other fields. For example, in food packaging, its excellent flexibility allows the packaging to conform to the shape of the product, and its high transparency facilitates the display of the product contents. In the medical field, its safety and stability meet relevant standards. However, in ultraviolet light, the unsaturated bonds in the PP molecular chain are susceptible to photooxidation reactions, causing the material to turn yellow and become brittle, and degrading mechanical properties such as tensile strength and impact strength. This significantly limits its application outdoors and in applications requiring high weather resistance.

[0004] Currently, improving the UV resistance of CDP-PP relies primarily on the addition of traditional additives. Common UV absorbers, such as benzophenones and benzotriazoles, work by absorbing UV energy and releasing it harmlessly as heat. Hindered amine light stabilizers (HALSs) inhibit photooxidation by capturing free radicals. However, traditional UV absorbers have a limited absorption wavelength range, making comprehensive protection difficult. Hindered amine light stabilizers are prone to migration and volatilization over long-term use, leading to a decrease in the light stabilization effect. Furthermore, the addition of these additives can interfere with the original molecular structure of CDP-PP, reducing the material's melt flow and resulting in a decrease in the transparency of the finished product. Therefore, there is an urgent need to improve the UV resistance of CDP-PP while maintaining its original transparency and mechanical properties. Summary of the Invention

[0005] In order to overcome the above problems, the present invention provides a UV-resistant propylene-butane binary copolymer polypropylene composite material and a preparation method thereof.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention provides a UV-resistant propylene-butane binary copolymer polypropylene composite material, the raw materials of which include, by weight: 90-95 parts of propylene-butane binary copolymer polypropylene, 5-10 parts of propylene-butane binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate, 1-3 parts of propylene-butane binary copolymer polypropylene modified with surface-modified nano-ZnO, and 1-3 parts of ethylene-vinyl alcohol copolymer as a compatibilizer.

[0008] In one or more embodiments, the grafting rate of the propylene glycol dipolymer grafted with p-hydroxybenzoic acid acrylate is 0.5-3%.

[0009] In one or more embodiments, the preparation method of propylene glycol dipolymer grafted with p-hydroxybenzoic acid acrylate comprises the following steps:

[0010] The surface of propylene-butane binary copolymer polypropylene is treated by plasma, and the treated propylene-butane binary copolymer polypropylene is immersed in a p-hydroxybenzoic acid acrylate solution. Under the initiation of an initiator, the propylene-butane binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate is reacted to obtain the propylene-butane binary copolymer polypropylene.

[0011] Preferably, the plasma treatment method comprises:

[0012] Place the propylene-butane binary copolymer polypropylene in a plasma treatment device, evacuate to 1-10 Pa, and treat for 3-8 minutes at a power of 30-150 W under oxygen conditions.

[0013] Preferably, the solvent of the p-hydroxybenzoic acid acrylate solution is ethanol; further preferably, the concentration of the p-hydroxybenzoic acid acrylate is 5% to 15% (mass fraction).

[0014] Preferably, the initiator is benzoyl peroxide.

[0015] Preferably, under the initiation of an initiator, the reaction temperature is 40-70° C., and the reaction time is 3-5 h.

[0016] In one or more embodiments, the propylene-butane binary copolymer polypropylene modified with surface-modified nano-ZnO is a composite material of nano-ZnO modified with a silane coupling agent and propylene-butane binary copolymer polypropylene.

[0017] Preferably, the silane coupling agent is selected from γ-methacryloxypropyltrimethoxysilane;

[0018] Further preferably, the mass ratio of the nano ZnO to γ-methacryloxypropyltrimethoxysilane is (6-20):(2-10).

[0019] More preferably, the particle size of the nano ZnO is 40 to 50 nm.

[0020] Preferably, the mass ratio of the nano ZnO modified by the silane coupling agent to the propylene-butane binary copolymer polypropylene is (2% to 8%):1.

[0021] In one or more embodiments, the preparation method of propylene-butane binary copolymer polypropylene modified with surface-modified nano-ZnO comprises the following steps:

[0022] Dispersing nano ZnO in toluene, adding silane coupling agent, and reacting to obtain surface-modified nano ZnO;

[0023] The surface-modified nano-ZnO and propylene-butane binary copolymer polypropylene are blended and extruded through a twin-screw extruder to obtain propylene-butane binary copolymer polypropylene modified with the surface-modified nano-ZnO.

[0024] Preferably, the silane coupling agent is selected from γ-methacryloxypropyltrimethoxysilane;

[0025] Further preferably, the mass ratio of the nano ZnO to γ-methacryloxypropyltrimethoxysilane is (6-20):(2-10).

[0026] Preferably, the temperature for the reaction to obtain the surface-modified nano-ZnO is 70-90° C., and the reaction time is 3-5 hours.

[0027] Preferably, the mass ratio of the surface-modified nano ZnO to the propylene-butane binary copolymer polypropylene is (2% to 8%):1.

[0028] Preferably, the processing temperature of the extruder is set to 170-210° C., and the screw speed is set to 200-350 r / min.

[0029] The second aspect of the present invention provides a method for preparing the UV-resistant propylene-butane binary copolymer polypropylene composite material according to the first aspect, comprising the following steps:

[0030] Propylene butadiene binary copolymer polypropylene, propane butadiene binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate, propane butadiene binary copolymer polypropylene modified with surface-modified nano-ZnO, and ethylene-vinyl alcohol copolymer as a compatibilizer are mixed uniformly, and then extruded through an extruder to obtain a propane butadiene binary copolymer polypropylene composite material resistant to ultraviolet aging.

[0031] In one or more embodiments, the extrusion temperature of the extruder is 160-190°C.

[0032] The beneficial effects of the present invention are:

[0033] (1) The present invention adopts a blend of propylene glycol binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate and propylene glycol binary copolymer polypropylene modified with surface-modified nano-ZnO to form a propylene glycol binary copolymer polypropylene composite material with surface functional modification and nano-ZnO hybridization synergistically enhanced anti-ultraviolet aging. The ultraviolet absorbance can be reduced by 60% to 85% in the ultraviolet wavelength range of 200 to 400 nm. Compared with traditional methods, the anti-ultraviolet performance is significantly improved, which can better meet the use requirements outdoors and in strong ultraviolet environments.

[0034] (2) The UV-resistant propylene-butane binary copolymer polypropylene composite material provided by the present invention has minimal effect on other properties of propylene-butane binary copolymer polypropylene while improving its UV resistance. Surface functionalization modification only acts on the surface of the material and does not affect the internal molecular structure and performance; nano-hybrid enhancement achieves uniform dispersion of nanoparticles through reasonable surface modification and processing technology, avoiding performance degradation due to agglomeration; the compatibilizer selected for blending synergistic modification effectively improves the compatibility of the blending system, ensuring that the basic properties of the material, such as mechanical properties, processing properties and high transparency, are maintained. The tensile strength retention rate of the treated material is above 93%, the elongation at break retention rate is above 90%, and the haze increase does not exceed 4%. While ensuring the UV resistance, it does not affect the application effect of the material in various fields.

[0035] (3) The surface functionalization modification, nano-hybrid enhancement and blending synergistic modification methods adopted in the present invention have relatively simple process operations, and the required equipment is common plastic processing equipment, which is easy to achieve industrial large-scale production. DETAILED DESCRIPTION

[0036] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] Example 1

[0039] (1) Preparation of propylene glycol dipolymer grafted with p-hydroxybenzoic acid acrylate: A propylene glycol dipolymer sheet was placed in a low-temperature plasma treatment apparatus, evacuated to 5 Pa, and introduced with an argon-oxygen mixed gas (oxygen content 20%) at a power of 80 W for 5 min. The sheet was then immersed in a 10% by mass ethanol solution of p-hydroxybenzoic acid acrylate (containing 1% by mass benzoyl peroxide as an initiator) at 55°C for 4 h, washed, and dried to obtain a propylene glycol dipolymer grafted with p-hydroxybenzoic acid acrylate with a grafting rate of 1.5%.

[0040] (2) Preparation of propylene glycol dipolymer polypropylene modified with surface-modified nano-ZnO: 3 g of nano-ZnO (particle size is 40-50 nm) was dispersed in 100 mL of toluene, ultrasonicated for 60 min, 3 g of γ-methacryloxypropyltrimethoxysilane was added, and stirred at 80 ° C for 4 h. After treatment, 4 g of nano-ZnO was blended with 99.2 g of propylene glycol dipolymer polypropylene resin in a twin-screw extruder and extruded into granules at 180-200 ° C and 300 r / min.

[0041] (3) Blending synergistic modification: The mass ratio of propylene glycol binary copolymer polypropylene: propylene glycol binary copolymer polypropylene grafted with parahydroxybenzoic acid acrylate: propylene glycol binary copolymer polypropylene modified with surface-modified nano-ZnO and compatibilizer ethylene-vinyl alcohol copolymer is 93:6:1:1. The mixture is mixed in a high-speed mixer at 80°C for 15 minutes, and melt-blended and extruded in a single-screw extruder at 170-180°C and 220 r / min to obtain a propylene glycol binary copolymer polypropylene composite material that is resistant to UV aging.

[0042] Comparative Example 1

[0043] Compared with Example 1, no blending was performed, and only the propylene-butane binary copolymer polypropylene, the propylene-butane binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate, and the propylene-butane binary copolymer polypropylene modified with surface-modified nano-ZnO were mixed in a mass ratio of 93:6:1.

[0044] Comparative Example 2

[0045] Compared with Example 1, the propylene-butane binary copolymer polypropylene without the addition of surface-modified nano-ZnO is

[0046] According to the mass ratio of propylene-butane binary copolymer polypropylene: propylene-butane binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate: compatibilizer ethylene-vinyl alcohol copolymer of 93:6:1, mixing was carried out in a high-speed mixer at 80°C for 15 minutes, and melt-blending and extruding was carried out in a single-screw extruder at 170-180°C and 220r / min to obtain a propylene-butane binary copolymer polypropylene composite material.

[0047] Example 2

[0048] Compared with Example 1, the proportion of nano ZnO is adjusted.

[0049] (1) Preparation of polypropylene copolymerized with propylene glycol grafted with p-hydroxybenzoic acid acrylate: the same as in Example 1.

[0050] (2) Preparation of propylene glycol dipolymer polypropylene modified with surface-modified nano-ZnO: 5 g of nano-ZnO (particle size is 40-50 nm) was dispersed in 150 mL of toluene, ultrasonicated for 70 min, added with 5 g of γ-methacryloxypropyltrimethoxysilane, and stirred at 90 ° C for 5 h. After treatment, 6.5 g of nano-ZnO was blended with 99.2 g of propylene glycol dipolymer polypropylene resin in a twin-screw extruder and extruded into granules at 190-210 ° C and 350 r / min.

[0051] (3) Blending synergistic modification: same as Example 1.

[0052] Example 3

[0053] Compared with Example 1, the blending polymer ratio is changed.

[0054] According to the mass ratio of propylene butadiene binary copolymer polypropylene: propylene butadiene binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate: propylene butadiene binary copolymer polypropylene modified with surface-modified nano-ZnO and compatibilizer ethylene-vinyl alcohol copolymer of 90:8:2:1, they were mixed in a high-speed mixer at 5°C for 20 minutes, and melt-blended and extruded in a single-screw extruder at 160-170°C and 200 r / min to obtain a propylene butadiene binary copolymer polypropylene composite material that is resistant to UV aging.

[0055] Example 4

[0056] Compared with Example 1, the surface modification reaction time was changed and adjusted.

[0057] Preparation of propylene glycol dipolymer grafted with p-hydroxybenzoic acid acrylate: A propylene glycol dipolymer sheet was placed in a low-temperature plasma treatment apparatus, evacuated to 8 Pa, and introduced with an argon-oxygen mixture (20% oxygen content) at 10 W for 6 minutes. The sheet was then immersed in a 10% (mass fraction) ethanol solution of p-hydroxybenzoic acid acrylate (containing 1.5% (mass fraction) benzoyl peroxide as an initiator) at 60°C for 3.5 hours. The sheet was then washed and dried to obtain a propylene glycol dipolymer grafted with p-hydroxybenzoic acid acrylate with a grafting efficiency of 1.0%.

[0058] The preparation of propylene-butane binary copolymerized polypropylene modified with surface-modified nano-ZnO is the same as that in Example 1.

[0059] Blending synergistic modification: same as Example 1.

[0060] Comparative Example 3: Unmodified

[0061] The original propylene-butane binary copolymer polypropylene material is directly used without any modification.

[0062] Comparative Example 4: Traditional additive addition

[0063] 2% by mass of benzophenone ultraviolet absorber and 1% by mass of hindered amine light stabilizer are added to propylene-butane binary copolymer polypropylene, and the mixture is evenly mixed and then processed into a mold.

[0064] Comparative Example 5: Adding only a single traditional additive

[0065] 3% by mass of benzotriazole ultraviolet absorber is added to propylene and butylene copolymer polypropylene, mixed evenly and then processed into a shape.

[0066] Comparative Example 6: Changing the proportion of traditional additives

[0067] 3% by mass of benzophenone ultraviolet absorber and 2% by mass of hindered amine light stabilizer are added to propylene-butane binary copolymer polypropylene, and the mixture is evenly mixed and then processed and formed.

[0068] Comparative Example 7: Using other conventional blends

[0069] A propylene-butane binary copolymer polypropylene resin and an ordinary ethylene-vinyl acetate copolymer (EVA) were mixed in a high-speed mixer at a mass ratio of 95:5, and then melt-blended and extruded in a single-screw extruder at 170°C. No polymer with dual functions of ultraviolet absorption and free radical scavenging and no compatibilizer were added.

[0070] Comparative Example 8: Blending with Nanoparticles without Surface Modification

[0071] (1) Weigh 10g of unsurface-modified nano-ZnO and directly blend it with 99g of propylene-butane copolymerized polypropylene resin and 1g of EVOH in a twin-screw extruder at a processing temperature of 170-200°C and a screw speed of 280r / min.

[0072] (2) No subsequent surface functionalization modification and blending synergistic modification steps are performed.

[0073] Comparative Example 9: Using simple physical mixing of ultraviolet absorbers

[0074] (1) 2% by mass of p-hydroxybenzoic acid acrylate powder and propylene-butane dipolymer polypropylene resin were simply mixed in a high-speed mixer without plasma treatment and grafting reaction in surface functionalization modification.

[0075] (2) Nano-hybrid reinforcement and blending synergistic modification steps are not performed.

[0076] Performance Testing

[0077] (1) UV absorbance test

[0078] Ultraviolet absorbance of the materials in the examples and comparative examples was measured using a UV-visible spectrophotometer within a wavelength range of 200-400 nm. The results showed that the ultraviolet absorbance of the material in Example 1 decreased by 78%, Comparative Example 1 by 62%, Comparative Example 2 by 65%, Example 2 by 70%, Example 3 by 68%, and Example 4 by 72%. Comparative Example 3 showed no decrease in absorbance, Comparative Example 4 by only 35%, Comparative Example 5 by 28%, Comparative Example 6 by 38%, Comparative Example 7 by 15%, Comparative Example 8 by 20%, and Comparative Example 9 by 18%.

[0079] (2) Mechanical properties test

[0080] Tensile strength and elongation at break were tested using an electronic universal material testing machine in accordance with national standard GB / T 1040.2-2006. Example 1 showed a tensile strength retention rate of 96% and an elongation at break retention rate of 93%. Comparative Example 1 showed a tensile strength retention rate of 95% and an elongation at break retention rate of 92%. Comparative Example 2 showed a tensile strength retention rate of 97% and an elongation at break retention rate of 94%. Example 2 showed a tensile strength retention rate of 94% and an elongation at break retention rate of 91%. Example 3 showed a tensile strength retention rate of 95% and an elongation at break retention rate of 93%. Example 4 showed a tensile strength retention rate of 96% and an elongation at break retention rate of 92%. Comparative Example 3 shows the performance of the original material; Comparative Example 4 has a tensile strength retention rate of 85%, and an elongation at break retention rate of 80%; Comparative Example 5 has a tensile strength retention rate of 88%, and an elongation at break retention rate of 82%; Comparative Example 6 has a tensile strength retention rate of 83%, and an elongation at break retention rate of 78%; Comparative Example 7 has a tensile strength retention rate of 90%, and an elongation at break retention rate of 85%; Comparative Example 8 has a tensile strength retention rate of 87%, and an elongation at break retention rate of 83%; Comparative Example 9 has a tensile strength retention rate of 92%, but due to the simple mixing, the internal structure of the material is uneven, and the performance stability is poor in actual use.

[0081] (3) Transparency test

[0082] Transparency was assessed using a haze meter. Example 1 showed a 2.5% increase in haze, while Comparative Example 1 showed a 3% increase, Comparative Example 2 showed a 2% increase, Example 2 showed a 3.5% increase, Example 3 showed a 2.8% increase, and Example 4 showed a 3.2% increase. Comparative Example 3 represents the haze of the original material; Comparative Example 4 showed a 10% increase in haze, Comparative Example 5 showed an 8% increase, Comparative Example 6 showed a 12% increase, Comparative Example 7 showed a 5% increase, Comparative Example 8 showed a 6% increase, and Comparative Example 9 showed a 7% increase. Due to uneven mixing, transparency varied significantly in different areas.

[0083] The performance test results are shown in Table 1 below.

[0084] Table 1 Performance test results

[0085]

[0086]

[0087] The UV-resistant propylene-butane binary copolymer polypropylene composite material provided by the present invention has minimal effect on other properties of the propylene-butane binary copolymer polypropylene while improving the UV resistance. Surface functionalization modification only acts on the surface of the material and does not affect the internal molecular structure and performance; nano-hybrid enhancement achieves uniform dispersion of nanoparticles through reasonable surface modification and processing technology, avoiding performance degradation due to agglomeration; the compatibilizer selected for blending synergistic modification effectively improves the compatibility of the blending system, ensuring that the basic properties of the material, such as mechanical properties, processing properties and high transparency, are maintained. The tensile strength retention rate of the treated material is above 93%, the elongation at break retention rate is above 90%, and the haze increase does not exceed 4%. While ensuring the UV resistance, it does not affect the application effect of the material in various fields.

[0088] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A UV-resistant propylene-butane binary copolymer polypropylene composite material, characterized in that: The raw materials include, by weight, 90-95 parts of propylene-butane binary copolymerized polypropylene, 5-10 parts of propylene-butane binary copolymerized polypropylene grafted with p-hydroxybenzoic acid acrylate, 1-3 parts of propylene-butane binary copolymerized polypropylene modified with surface-modified nano-ZnO, and 1-3 parts of ethylene-vinyl alcohol copolymer as a compatibilizer.

2. The UV-resistant propylene-butane binary copolymer polypropylene composite material according to claim 1, wherein: The grafting rate of the propylene glycol binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate is 0.5-3%.

3. The UV-resistant propylene-butane binary copolymer polypropylene composite material according to claim 1, wherein: The preparation method of propylene glycol dipolymer grafted with p-hydroxybenzoic acid acrylate comprises the following steps: The surface of propylene-butane binary copolymer polypropylene is treated by plasma, and the treated propylene-butane binary copolymer polypropylene is immersed in a p-hydroxybenzoic acid acrylate solution. Under the initiation of an initiator, the propylene-butane binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate is reacted to obtain the propylene-butane binary copolymer polypropylene.

4. The UV-resistant propylene-butane binary copolymer polypropylene composite material according to claim 3, wherein: The plasma treatment method comprises: Place the propylene-butane binary copolymer polypropylene in a plasma treatment device, evacuate to 1-10 Pa, and treat for 3-8 minutes at a power of 30-150 W under oxygen conditions; Alternatively, the solvent of the p-hydroxybenzoic acid acrylate solution is ethanol; preferably, the concentration of the p-hydroxybenzoic acid acrylate is 5% to 15% (mass fraction).

5. The UV-resistant propylene-butane binary copolymer polypropylene composite material according to claim 3, wherein: The initiator is benzoyl peroxide; Alternatively, under the initiation of an initiator, the reaction temperature is 40-70° C., and the reaction time is 3-5 hours.

6. The UV-resistant propylene-butane binary copolymer polypropylene composite material according to claim 1, wherein: The surface-modified nano-ZnO-co-propylene-butane-dipolymerized polypropylene is a composite material of nano-ZnO modified with a silane coupling agent and the surface-modified nano-ZnO-co-propylene-butane-dipolymerized polypropylene. Preferably, the silane coupling agent is selected from γ-methacryloxypropyltrimethoxysilane; preferably, the mass ratio of the nano ZnO to γ-methacryloxypropyltrimethoxysilane is (6-20): (2-10); Preferably, the particle size of the nano ZnO is 40 to 50 nm; Preferably, the mass ratio of the nano ZnO modified by the silane coupling agent to the propylene-butane binary copolymer polypropylene is (2% to 8%):

1.

7. The UV-resistant propylene-butane binary copolymer polypropylene composite material according to claim 1, wherein: The preparation method of propylene-butane binary copolymer polypropylene modified with surface-modified nano-ZnO comprises the following steps: Dispersing nano ZnO in toluene, adding silane coupling agent, and reacting to obtain surface-modified nano ZnO; The surface-modified nano-ZnO and propylene-butane binary copolymer polypropylene are blended and extruded through a twin-screw extruder to obtain propylene-butane binary copolymer polypropylene modified with the surface-modified nano-ZnO.

8. The UV-resistant propylene-butane binary copolymer polypropylene composite material according to claim 7, wherein: The extruder processing temperature is set at 170-210°C and the screw speed is 200-350 r / min.

9. The method for preparing the UV-resistant propylene-butane binary copolymer polypropylene composite material according to any one of claims 1 to 8, characterized in that: The steps include: Propylene butadiene binary copolymer polypropylene, propane butadiene binary copolymer polypropylene grafted with p-hydroxybenzoic acid acrylate, propane butadiene binary copolymer polypropylene modified with surface-modified nano-ZnO, and ethylene-vinyl alcohol copolymer as a compatibilizer are mixed uniformly, and then extruded through an extruder to obtain a propane butadiene binary copolymer polypropylene composite material resistant to ultraviolet aging.

10. The preparation method according to claim 9, characterized in that The extrusion temperature of the extruder is 160-190°C.

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