A high-performance PPO / POK alloy material, its preparation method and application

Abstract

The present invention discloses a high-performance PPO / POK alloy material, its preparation method and application, belonging to the technical field of polymer materials. The PPO / POK alloy comprises 50 - 80 parts of PPO resin; 5 - 20 parts of PS-g-POK resin; 5 - 20 parts of POK resin; 0.1 - 1 part of antioxidant; and 0.1 - 1 part of lubricant. An intermediate product is prepared through a solution bromination reaction, and styrene monomer polymerization is carried out under the action of an initiator to obtain a surface-grafted and modified PS-g-POK resin. By adding PS-g-POK to PPO / POK in the present invention, an alloy material with excellent compatibility is prepared. Compared with existing alloys such as PPO / PS and PPO / PA, the heat resistance, impact performance, solvent resistance, flame retardancy and other properties of the material are significantly improved, greatly expanding the application scope of modified polyphenylene ether materials in the fields of electronics and electricity, automobiles and mechanical industries.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and particularly relates to a high-performance PPO / POK alloy material, a preparation method thereof, and an application thereof. Background Art

[0002] Polyphenylene oxide (abbreviated as PPO) is one of the five engineering plastics with a phenoxy group in the molecular main chain. The main chain is composed of benzene rings and oxygen atoms arranged, and has excellent properties such as high heat resistance, high dielectric properties, acid and alkali resistance, and hydrolysis resistance. It is widely used in the fields of electronics and electricity, household appliances, office automation, automotive industry, aerospace, and military industry, and is used as materials for automotive instrument panels, fenders, printed circuit boards, corrosion-resistant parts of pipes and valves, gears, and bearings.

[0003] However, the large rigidity of the PPO molecular main chain structure results in a high melting point, a very large melt viscosity, and poor fluidity, thus making processing difficult. In addition, it has the disadvantages of poor solvent resistance, easy stress cracking of products, and low notched impact strength. The high processing temperature (330°C) of PPO is prone to degradation, resulting in difficult processing and excessive energy consumption. In order to overcome these disadvantages and endow PPO with new properties, various modification methods have been carried out on it. Generally, polystyrene (PS) is used for modification to improve the processing fluidity of the alloy. Researchers continue to study the alloying of PPO, and modify PPO with engineering plastics such as polyamide (PA), polybutylene terephthalate (PBT), and polyphenylene sulfide (PPS) to develop the second-generation polyphenylene oxide alloy.

[0004] Both PPO and PS are amorphous polymers and have good compatibility. By mixing PS, the processing cost can be reduced, and the processing formability of PPO can be greatly improved, but the heat resistance is reduced. The blending modification of PPO and PA not only improves the processing performance and solvent resistance of PPO, but also improves the heat resistance and dimensional stability of PA, thus achieving complementary advantages. However, their compatibility is very poor, belonging to a completely incompatible system, and the phase separation of the blend alloy is serious, resulting in the alloy being brittle. It is necessary to compatibilize and toughen the PPO / PA alloy to meet the application requirements. However, the PPO / PA alloy still has the problem of relatively high water absorption.

[0005] Polyketone (POK) resin is a new type of green environmental protection and thermoplastic engineering plastic. Using carbon monoxide, ethylene, and propylene as the main raw materials, it has low water absorption, high wear resistance, high chemical resistance, high impact strength, and high gas barrier performance. Its wear resistance is 14 times that of polyoxymethylene (POM), the impact toughness is 2.5 times that of PA6, and the oil resistance is 2 times that of PA12. It is almost the most balanced engineering material currently and has very broad application prospects and is developing very rapidly. Currently, there are some reports on PPO / POK alloys. The patent with application number 201810179218.6 reported a polyphenylene ether / polyketone flame-retardant composite material and its preparation method. The PPO / POK was melt-blended and modified by adding a compatibilizer and a flame retardant. The flame-retardant performance of the material is excellent and can reach the 5VA flame-retardant performance, but the mechanical properties are greatly reduced. The patent with application number 202311362291.4 reported a preparation method of a low-dielectric PPO / POK alloy. A linear non-oil-filled styrene-ethylene-butene-styrene block copolymer (SEBS) and a linear oil-filled SEBS were used to toughen and modify the alloy, but it also led to a decrease in the modulus of the alloy. In addition, due to the large viscosity of PPO resin, the fluidity of preparing the alloy is poor. Summary of the Invention

[0006] One of the purposes of the present invention is to provide a high-performance PPO / POK alloy material to solve the problem of poor performance of existing PPO / POK alloys;

[0007] Another purpose of the present invention is to provide a preparation method of a high-performance PPO / POK alloy material;

[0008] The third purpose of the present invention is to provide an application of a high-performance PPO / POK alloy material.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] In the first aspect, the present invention provides a high-performance PPO / POK alloy material, which includes the following components in parts by weight:

[0011] PPO resin 50 - 80 parts;

[0012] PS-g-POK resin 5 - 20 parts;

[0013] POK resin 5 - 20 parts;

[0014] Antioxidant 0.1 - 1 part;

[0015] Lubricant 0.1 - 1 part.

[0016] As a further scheme of the present invention, the PS-g-POK resin is prepared by the following steps:

[0017] S1. Caprolactam Dissolution: Using CPL (caprolactam) as a solvent, dissolve the POK resin in CPL at a temperature of 135 - 145 °C, mix evenly to obtain a POK / CPL solution;

[0018] S2. Bromination Reaction Grafting: Under nitrogen and stirring conditions, add a strong base solution to the POK / CPL solution, react at 135 - 145 °C for 2 - 4 h; then add a 4-bromostyrene solution and continue to react for 5 - 7 h to obtain an intermediate product;

[0019] S3. Styrene Graft Polymerization: Under nitrogen conditions at a temperature of 95 - 105 °C, add AIBN (azobisisobutyronitrile) and styrene to the intermediate product, stir and react for 7 - 9 h, collect the product, and obtain the PS-g-POK resin after drying.

[0020] As a further scheme of the present invention, in S1, the mass ratio of the POK resin to CPL is 10:90.

[0021] As a further scheme of the present invention, in S2, the concentration of the strong base solution is 0.1 M, and the strong base is any one of potassium tert-butoxide (tBuOK) and sodium ethoxide.

[0022] As a further scheme of the present invention, in S2, the mass ratio of POK to the strong base in the POK / CPL solution is 10:1.

[0023] As a further scheme of the present invention, in S2, the mass ratio of POK to 4-bromostyrene in the POK / CPL solution is 1:2.

[0024] As a further scheme of the present invention, in S2, the concentration of the 4-bromostyrene solution is 0.5 M, and the solvent of the 4-bromostyrene solution is ethanol or dimethyl sulfoxide.

[0025] As a further scheme of the present invention, in S2, the stirring speed is 50 - 100 r / min.

[0026] As a further scheme of the present invention, in S3, as an initiator, the mass ratio of AIBN to POK in the intermediate product is 0.01 - 0.1:1.

[0027] As a further scheme of the present invention, in S3, the mass ratio of styrene to POK in the intermediate product is 0.1:1.

[0028] As a further scheme of the present invention, in S3, the product is precipitated, filtered, and washed with a mixed solvent of water and ethanol (V / V = 1:1), and then vacuum dried at 60 °C.

[0029] As a further aspect of the present invention, the POK resin is one of a carbon monoxide-ethylene binary copolymer or a carbon monoxide-ethylene-propylene terpolymer, wherein the amount of propylene in the terpolymer is less than twice that of ethylene.

[0030] As a further aspect of the present invention, the antioxidant is composed of antioxidant 1010 and antioxidant 168.

[0031] As a further aspect of the present invention, the lubricant is ethylene bisstearamide (EBS).

[0032] In a second aspect, the present invention provides a method for preparing a high-performance PPO / POK alloy material, comprising the following steps:

[0033] Weigh each component by weight, perform co-blending modification through a twin-screw extruder, dry after cooling, cutting, and pelletizing to obtain the PPO / POK alloy material.

[0034] As a further aspect of the present invention, the temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 200 - 220 °C, the temperature of the metering section is 220 - 240 °C, the temperature of the die head is 230 °C, and the rotational speed of the screw is 200 - 300 r / min.

[0035] As a further aspect of the present invention, the temperature for drying after pelletizing is 100 °C, and the drying time is 4 h.

[0036] In a third aspect, the present invention provides an application of the high-performance PPO / POK alloy material in the fields of automotive instrument panels, pipes, valves, gears, and bearings.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] 1. The present invention provides a high-performance PPO / POK alloy material. Through the bromo-addition of the carbonyl group of POK under alkaline conditions, styrene monomers are attached to the side chain of POK; then through a free radical polymerization reaction, PS is grafted onto the surface of POK. Since PPO and PS have good interfacial interactions, the compatibility between POK and PPO is improved, and the comprehensive performance of the PPO / POK alloy is enhanced.

[0039] 2. The improvement in the compatibility of the PPO / POK alloy prepared by the present invention endows the alloy material with excellent strength and toughness, as well as higher chemical resistance, heat resistance, and wear resistance, avoiding problems such as reduced strength and heat resistance and increased water absorption that occur when PS or PA is used to modify PPO, and broadening the application in automotive instrument panels, corrosion-resistant parts of pipes, valves, gears, and wear-resistant parts of bearings. Description of the Drawings

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] Figure 1 is the preparation flow chart of the PS-g-POK resin prepared in Preparation Example 1 of the present invention;

[0042] Figure 2 is the infrared test characterization diagram of the PS-g-POK resin prepared in Preparation Example 1 of the present invention;

[0043] Figure 3 is Figure 2 the corresponding enlarged view of Region 1 in

[0044] Figure 4 is Figure 2 the corresponding enlarged view of Region 2 in

[0045] Figure 5 is Figure 2 the corresponding enlarged view of Region 3 in Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Obviously, the following description is only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some designs, manufacturing or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0048] However, there will be cases where unnecessary detailed descriptions are omitted. For example, there are cases where the detailed descriptions of well-known matters are omitted and the repeated descriptions of actually identical structures are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the following description is provided for those skilled in the art to fully understand the present application and is not intended to limit the subject matter described in the claims.

[0049] If there is no special description, all the implementation manners and optional implementation manners of the present application can be combined with each other to form new technical solutions, and all the technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention.

[0051] Any range recited in the present invention includes the end values and any numerical values between the end values, as well as any sub-ranges formed by any of the end values or any numerical values between the end values.

[0052] Preparation Example 1

[0053] Please refer to Figure 1 the preparation flow chart shown below. This preparation example provides a PS-g-POK resin, which is prepared by the following steps:

[0054] Raw material weighing and preparation: 10 g of POK resin (Hyosung, grade M630); 90 g of CPL; 1 g of tBuOK. Using deionized water as the solvent, a 0.1 M tBuOK solution of 88.5 mL is prepared; 20 g of 4-bromostyrene. Using ethanol as the solvent, a 0.5 M 4-bromostyrene solution of 218 mL is prepared; 0.2 g of AIBN; 1 g of styrene;

[0055] S1. Dissolution of caprolactam: Add 90 g of CPL to a round-bottom flask, heat it to 140 °C to melt it. Using CPL as the solvent, dissolve 10 g of POK resin in CPL at a stirring speed of 100 r / min to obtain a uniformly mixed POK / CPL solution;

[0056] S2. Grafting by bromination reaction: Under the conditions of nitrogen and a stirring speed of 50 r / min, add 88.5 mL of 0.1 M tBuOK solution to the POK / CPL solution. As the strong base substance is added, the color of the solution turns black. Under the condition of a temperature of 140 °C, continue to stir and react for 3 h; then add 218 mL of 0.5 M 4-bromostyrene solution, continue to stir and react for 6 h, cool down to 100 °C, and evacuate to remove the excessive 4-bromostyrene to obtain an intermediate product;

[0057] S3. Graft polymerization of styrene: Under the conditions of a temperature of 100 °C and nitrogen, add 0.2 g of AIBN and 1 g of styrene to the intermediate product, stir and react at a speed of 100 r / min for 8 h. Use a mixed solvent of water and ethanol (v / v = 1:1) to precipitate, filter and wash the product 3 times, and then dry it in vacuo at 60 °C to obtain the PS-g-POK resin.

[0058] The prepared PS-g-POK resin was characterized. Before the test, it was purified. Using tetrahydrofuran as the solvent, the PS-g-POK grafted product was purified by a Soxhlet extractor to remove the self-polymerized polystyrene. After vacuum drying, it was pressed into a sheet by a vulcanizer and subjected to ATR infrared testing. The characterization test results of the PS-g-POK resin and the ungrafted and unmodified POK resin are compared as Figure 2 shown; to facilitate the observation of the differences in infrared characteristic peaks, the regions 1, 2, and 3 in the spectrum were magnified.

[0059] Figure 2 The magnified view corresponding to region 1 in Figure 3 is Figure 3 . It can be seen from -1 that characteristic peaks appear at 3081 cm -1 , 3059 cm -1 , corresponding to the stretching vibration of the C-H of the benzene ring;

[0060] Figure 2 The magnified view corresponding to region 2 in Figure 4 is Figure 4 . It can be seen from -1 that characteristic peaks appear at 1602 cm -1 , 1493 cm -1 , corresponding to the stretching vibration of the C=C on the benzene ring;

[0061] Figure 2 The magnified view corresponding to region 3 in Figure 5 is Figure 5 . It can be seen from -1 that characteristic peaks appear at 759 cm -1 and 698 cm

[0062] , corresponding to the in-plane bending vibration of the C-H of the monosubstituted benzene ring.

[0063] Preparation Example 2

[0064] This preparation example provides a method for preparing a PS-g-POK resin. The difference from Preparation Example 1 is that the POK resin is M330 produced by Hyosung, and the remaining steps and parameters are the same as those in Preparation Example 1.

[0065] Example 1

[0066] A high-performance PPO / POK alloy material, by weight, comprises the following components:

[0067] 70 parts of PPO resin (BlueStar, grade LXR-040);

[0068] 5 parts of PS-g-POK resin (prepared in Preparation Example 1);

[0069] 15 parts of POK resin (Hyosung, grade M630);

[0070] 0.2 part of antioxidant 1010 and 0.2 part of antioxidant 168;

[0071] 0.1 part of ethylene bisstearamide;

[0072] The preparation method of the PPO / POK alloy material includes the following steps:

[0073] Weigh each component according to the above weight parts, and carry out blending modification through a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotational speed of the screw is 250 r / min; after cooling, cutting and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0074] Example 2

[0075] A high-performance PPO / POK alloy material, by weight, includes the following components:

[0076] 70 parts of PPO resin (Blue Star, grade LXR-040);

[0077] 10 parts of PS-g-POK resin (prepared in Preparation Example 1);

[0078] 20 parts of POK resin (Hyosung, grade M630);

[0079] 0.2 part of antioxidant 1010 and 0.2 part of antioxidant 168;

[0080] 0.1 part of ethylene bisstearamide;

[0081] The preparation method of the PPO / POK alloy material includes the following steps:

[0082] Weigh each component according to the above weight parts, and carry out blending modification through a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotational speed of the screw is 250 r / min; after cooling, cutting and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0083] Example 3

[0084] A high-performance PPO / POK alloy material, by weight, includes the following components:

[0085] 70 parts of PPO resin (BlueStar, grade LXR-040);

[0086] 10 parts of PS-g-POK resin (prepared in Preparation Example 2);

[0087] 20 parts of POK resin (Hyosung, grade M330);

[0088] 0.2 part of antioxidant 1010 and 0.2 part of antioxidant 168;

[0089] 0.1 part of ethylene bisstearamide;

[0090] The preparation method of the PPO / POK alloy material includes the following steps:

[0091] Weigh each component according to the above weight parts, and carry out blending modification through a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotation speed of the screw is 250 r / min; after cooling, cutting, and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0092] Example 4

[0093] A high-performance PPO / POK alloy material, by weight, includes the following components:

[0094] 65 parts of PPO resin (BlueStar, grade LXR-040);

[0095] 15 parts of PS-g-POK resin (prepared in Preparation Example 1);

[0096] 20 parts of POK resin (Hyosung, grade M630);

[0097] 0.2 part of antioxidant 1010 and 0.2 part of antioxidant 168;

[0098] 0.1 part of ethylene bisstearamide;

[0099] The preparation method of the PPO / POK alloy material includes the following steps:

[0100] Weigh each component according to the above weight parts, and carry out blending modification through a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotation speed of the screw is 250 r / min; after cooling, cutting, and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0101] Example 5

[0102] A high-performance PPO / POK alloy material, by weight, comprises the following components:

[0103] 50 parts of PPO resin (BlueStar, grade LXR-040);

[0104] 20 parts of PS-g-POK resin (prepared in Preparation Example 1);

[0105] 10 parts of POK resin (Hyosung, grade M630);

[0106] 0.2 part of antioxidant 1010 and 0.2 part of antioxidant 168;

[0107] 0.1 part of ethylene bisstearamide;

[0108] The preparation method of the PPO / POK alloy material comprises the following steps:

[0109] Weigh each component according to the above weight parts, and carry out blending modification by a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotation speed of the screw is 250 r / min; after cooling, cutting and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0110] Example 6

[0111] A high-performance PPO / POK alloy material, by weight, comprises the following components:

[0112] 80 parts of PPO resin (BlueStar, grade LXR-040);

[0113] 15 parts of PS-g-POK resin (prepared in Preparation Example 1);

[0114] 5 parts of POK resin (Hyosung, grade M630);

[0115] 0.2 part of antioxidant 1010 and 0.2 part of antioxidant 168;

[0116] 0.1 part of ethylene bisstearamide;

[0117] The preparation method of the PPO / POK alloy material comprises the following steps:

[0118] Weigh each component according to the above weight parts, and carry out blending modification through a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotation speed of the screw is 250 r / min; after cooling, cutting and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0119] Comparative Example 1

[0120] A PPO / POK alloy material, by weight, comprises the following components:

[0121] 70 parts of PPO resin (BlueStar, grade LXR-040);

[0122] 10 parts of PS resin (grade 525);

[0123] 20 parts of POK resin (Hyosung, grade M630);

[0124] 0.2 part of antioxidant 1010 and 0.2 part of antioxidant 168;

[0125] 0.1 part of ethylene bisstearamide;

[0126] The preparation method of the PPO / POK alloy material comprises the following steps:

[0127] Weigh each component according to the above weight parts, and carry out blending modification through a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotation speed of the screw is 250 r / min; after cooling, cutting and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0128] Comparative Example 2

[0129] A PPO / POK alloy material, by weight, comprises the following components:

[0130] 70 parts of PPO resin (BlueStar, grade LXR-040);

[0131] 10 parts of a mixed resin of PS resin (Yangzi Petrochemical, grade GP-525) and POK resin (Hyosung, grade M630) in a mass ratio of 1:1;

[0132] 20 parts of POK resin (Hyosung, grade M630);

[0133] 0.2 part of antioxidant 1010 and 0.2 part of antioxidant 168;

[0134] Ethylene bisstearamide 0.1 part;

[0135] The preparation method of the PPO / POK alloy material comprises the following steps:

[0136] Weigh each component according to the above weight parts, and carry out blending modification through a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotation speed of the screw is 250 r / min; after cooling, cutting and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0137] Comparative Example 3

[0138] A high-performance PPO / POK alloy material, by weight, comprises the following components:

[0139] PPO resin (BlueStar, grade LXR-040) 70 parts;

[0140] PS-g-POK resin (prepared in Preparation Example 1) 1 part;

[0141] POK resin (Hyosung, grade M630) 20 parts;

[0142] Antioxidant 1010 0.2 part, antioxidant 168 0.2 part;

[0143] Ethylene bisstearamide 0.1 part;

[0144] The preparation method of the PPO / POK alloy material comprises the following steps:

[0145] Weigh each component according to the above weight parts, and carry out blending modification through a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotation speed of the screw is 250 r / min; after cooling, cutting and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0146] Comparative Example 4

[0147] A high-performance PPO / POK alloy material, by weight, comprises the following components:

[0148] PPO resin (BlueStar, grade LXR-040) 70 parts;

[0149] PS-g-POK resin (prepared in Preparation Example 1) 25 parts;

[0150] POK resin (Hyosung, grade M630) 20 parts;

[0151] 0.2 parts of antioxidant 1010 and 0.2 parts of antioxidant 168;

[0152] 0.1 part of ethylene bisstearamide;

[0153] The preparation method of the PPO / POK alloy material comprises the following steps:

[0154] Weigh each component according to the above weight parts, and carry out blending modification by a twin-screw extruder. The temperature of the feeding section of the screw of the twin-screw extruder is 200 °C, the temperature of the compression section is 210 °C, the temperature of the metering section is 230 °C, the temperature of the die head is 230 °C, and the rotational speed of the screw is 250 r / min; after cooling, cutting and pelletizing, the pellets are dried at 100 °C for 4 h to obtain the PPO / POK alloy material.

[0155] The relevant parameters in the above examples and comparative examples are summarized in Table 1.

[0156] Table 1

[0157]

[0158] Performance test:

[0159] The PPO / POK alloy materials prepared in Examples 1 - 6 and Comparative Examples 1 - 4 are injection molded into mechanical property test specimens by a plastic injection molding machine for mechanical property tests:

[0160] (1) The tensile property is in accordance with the standard of GB / T 1040;

[0161] (2) The flexural property is in accordance with GB / T 9341;

[0162] (3) The notched impact is tested in accordance with the standard of GB / T 1843;

[0163] The number of tests for each specimen is 5, and the average value is taken as the result of this group.

[0164] The above test results are shown in Table 2.

[0165] Table 2

[0166]

[0167] (4) The water absorption rate is tested according to the ISO 62 standard, and left standing for 24 h at 23 °C and 50% RH;

[0168] (5) The heat distortion temperature is in accordance with the provisions of GB / T 1634.2. A load is applied to make the maximum bending normal stress of the specimen reach 1.82 MPa, and the temperature at which the relative change in the midpoint deflection of the specimen before and after heating reaches 0.25 mm is taken as the heat distortion temperature of the specimen;

[0169] (6) Solvent corrosion resistance: Use a medical gauze saturated with solvent to wipe the surface of the specimen at the same place with the same pressure for 200 times, and calculate the mass loss rate.

[0170] (7) Flame retardancy performance: Refer to the UL94 test method.

[0171] The above test results are shown in Table 3.

[0172] Table 3

[0173]

[0174] It can be seen from Table 2 and Table 3 that when comparing Example 2 with Comparative Example 1, all the PS-g-POK resin is replaced with PS resin. Although PS resin has good interfacial interaction with PPO resin, PS resin is not graft-polymerized with POK resin, and its compatibility between PPO resin and POK resin is not improved, resulting in poor performance of the PPO / POK alloy; when comparing Example 2 with Comparative Example 2, the PS-g-POK resin is replaced with a mixed resin of PS and POK. Since the compatibility problem between PS and POK is not solved, the PPO / POK alloy material still has poor performance; when comparing Example 2 with Comparative Example 3 and Comparative Example 4, reducing the amount of PS-g-POK resin results in poor performance of the PPO / POK alloy material, and increasing the amount of PS-g-POK resin can also keep the performance of the PPO / POK alloy material relatively stable. In order to reduce the preparation cost of the PPO / POK alloy material, the ratio of 5-20 parts by weight of PS-g-POK resin in the present invention can not only achieve good alloy material performance, but also realize cost reduction and efficiency increase.

[0175] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0176] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high performance PPO / POK alloy material, characterized in that: According to weight parts, it includes the following components: PPO resin 50-80 parts; PS-g-POK resin 5-20 parts; 5-20 parts of POK resin; Antioxidant 0.1-1 part; Lubricant 0.1-1 part; The PS-g-POK resin is prepared by the following steps: S1. Dissolve the POK resin in CPL at a temperature of 135-145°C, mix well, and obtain a POK / CPL solution; S2. Add a strong base solution to the POK / CPL solution under nitrogen and stirring conditions, and react at 135-145°C for 2-4 hours; then add 4-bromostyrene solution and continue to react for 5-7 hours to obtain an intermediate product; S3. Add AIBN and styrene to the intermediate product at a temperature of 95-105°C and nitrogen, stir and react for 7-9 hours, collect the product, and obtain PS-g-POK resin after drying.

2. A high performance PPO / POK alloy material according to claim 1, characterized in that: In S1, the mass ratio of POK resin to CPL is 10:

90.

3. A high performance PPO / POK alloy material according to claim 1, characterized in that: In S2, the concentration of the strong base solution is 0.1 M, and the strong base is any one of potassium tert-butoxide and sodium ethoxide; The mass ratio of POK to strong base in the POK / CPL solution is 10:

1.

4. A high performance PPO / POK alloy material according to claim 1, characterized in that: In S2, the concentration of the 4-bromostyrene solution is 0.5 M, and the solvent of the 4-bromostyrene solution is ethanol or dimethyl sulfoxide; The mass ratio of POK to 4-bromostyrene in the POK / CPL solution is 1:

2.

5. A high performance PPO / POK alloy material according to claim 1, characterized in that: In S3, the mass ratio of AIBN to POK in the intermediate product is 0.01-0.1:

1.

6. A high performance PPO / POK alloy material according to claim 1, characterized in that: In S3, the mass ratio of styrene to POK in the intermediate product is 0.1:

1.

7. A method for preparing a high-performance PPO / POK alloy material as claimed in claim 1, characterized in that: The following steps are involved: The components are weighed according to their weight proportions, blended and modified by a twin-screw extruder, and dried after cooling, cutting, granulation, to obtain a PPO / POK alloy material.

8. The method for preparing a high-performance PPO / POK alloy material according to claim 7, characterized in that: The feeding section temperature of the screw of the twin-screw extruder is 200°C, the compression section temperature is 200-220°C, the metering section temperature is 220-240°C, the die head temperature is 230°C, and the screw speed is 200-300r / min.

9. Application of the high performance PPO / POK alloy material as claimed in claim 1 in automobile instrument panels, pipes, valves, gears and bearings.

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