High-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material and modification method

Abstract

The invention discloses a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material and a modification method, and relates to the technical field of composite materials. Ultra-high molecular weight polyethylene is firstly mixed with a fluorine-containing silane coupling agent, a thermal initiator and a crosslinking catalyst according to a specific proportion, and then the mixture is compounded with a low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material. The modification of the high-temperature-resistant injection molding grade ultrahigh molecular weight polyethylene composite material is realized. The method has the characteristics of being simple in process, low in cost, mild in reaction condition and wide in application field, and has a good development prospect.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of composite materials, and particularly relates to a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material and a modification method. BACKGROUND

[0002] Ultra-high molecular weight polyethylene (UHMWPE) is a thermoplastic engineering plastic with excellent comprehensive performance of linear structure, and has an average molecular weight of about 350-800 million. Due to the high molecular weight, the UHMWPE has excellent impact resistance, wear resistance, self-lubricating property, chemical corrosion resistance and other properties that cannot be compared with other plastics. Moreover, the UHMWPE has excellent low-temperature resistance and still has a high impact strength at-40℃, and can even be used at-269℃. However, due to the large molecular weight and low critical shear viscosity of the UHMWPE, the UHMWPE is prone to phase separation and extremely difficult to extrude during injection molding. So far, the injection molding technology has not been successfully applied on a large scale in the field of UHMWPE. In addition, the heat distortion temperature of the UHMWPE is relatively low, which is 85℃, and this also limits the application of the UHMWPE in high-temperature environments.

[0003] Patent CN102850627 discloses an injection molding grade carbon fiber reinforced ultra-high molecular weight polyethylene and a preparation method thereof, which has the following components by weight: 45-75 parts of ultra-high molecular weight polyethylene, 5-20 parts of liquid crystal polymer (LCP), 5-10 parts of MA-POE (maleic anhydride grafted-polyolefin elastomer), and 15-35 parts of carbon fiber. All the raw materials are mixed in a mixer, and then are extruded and granulated by a double-screw extruder at a temperature of 200-240℃ to obtain the injection molding grade carbon fiber reinforced ultra-high molecular weight polyethylene. The injection molding grade carbon fiber reinforced ultra-high molecular weight polyethylene has the advantages of super toughness, low-temperature resistance, high wear resistance, high strength, good dimensional stability, electrical conductivity and high rigidity. However, liquid crystal polymer and other components are used, the general applicability is low, and a double-screw granulator is needed, which has a high cost.

[0004] Patent CN109401171 discloses a high-temperature-resistant ultra-high molecular weight polyethylene pipe and a preparation method thereof. The 1,2,2-trifluorovinyltriphenylsilane, octavinyl-POSS (polystyrene spherical cluster siloxane), initiator, fluorine-containing adamantyl-based polycondensate, ultra-high molecular weight polyethylene and glycidyl methacrylate grafted ultra-high molecular weight polyethylene fiber are uniformly stirred at high speed, and then are extruded and formed by a double-screw extruder to obtain the high-temperature-resistant ultra-high molecular weight polyethylene pipe. However, the preparation of the raw materials has a high cost, the process is complicated, and the general applicability is low. SUMMARY

[0005] In order to solve the above problems in the prior art, the application provides a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material and a modification method. The technical problems to be solved by the application are solved by the following technical scheme. The application provides a modification method of a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, comprising the following steps: Step 1: mixing a fluorine-containing silane coupling agent, a thermal initiator and a crosslinking catalyst to obtain a mixed solvent; Step 2: blending and compounding the ultra-high molecular weight polyethylene resin with the mixed solvent by spray dispersion to obtain an intermediate; Step 3: blending and compounding the intermediate with a low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material; The low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 1-5 g / 10 min and polyethylene with a melt index of 5-10 g / 10 min in a weight ratio of 1:1-5:1 under a 2.16 Kg load. The structural formula of the fluorine-containing silane coupling agent is: ; R1, R2 and R3 are methoxy or ethoxy; Rf is n is an integer of 1-10; X is one of methylene, ethylene and amino; X1 is one of perfluoromethylene, methylene, amino, ester and oxygen; and Y is one of methyl, ethyl, propyl, amino, hydrogen and fluorine.

[0006] In an embodiment of the application, the mass ratio of the fluorine-containing silane coupling agent, the thermal initiator and the crosslinking catalyst is (1-10):1:3.

[0007] In an embodiment of the application, the mass of the mixed solvent is 0.1%-5% of the mass of the ultra-high molecular weight polyethylene resin.

[0008] In an embodiment of the application, the mass ratio of the intermediate and the low molecular weight polyolefin flow modifier is 9:1-1:9.

[0009] In an embodiment of the application, the viscosity-average molecular weight of the ultra-high molecular weight polyethylene resin is 1-7 million.

[0010] In an embodiment of the application, the thermal initiator is dicumyl peroxide, benzoyl peroxide, diisopropylbenzene peroxide or 2,5-dimethyl-2,5-di-tert-butylperoxyhexane.

[0011] In an embodiment of the application, the crosslinking catalyst is dibutyltin dilaurate, stannous octoate, bis(dodecylthio)dibutyltin or dibutyltin diacetate.

[0012] The application provides a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material obtained by the modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material.

[0013] Compared with the prior art, the application has the beneficial effects that: 1. The modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, by the synergistic effect of the fluorine-containing silane coupling agent, the thermal initiator and the crosslinking catalyst, introduces a crosslinking structure into the molecular chain of the ultra-high molecular weight polyethylene (UHMWPE), realizes the surface modification and crosslinking structure regulation of the ultra-high molecular weight polyethylene resin in the spray dispersion process, effectively inhibits the slip of the molecular chain at high temperature, and further delays the thermal degradation of the material due to the heat resistance of the fluorine-containing silane, so that the composite material can still maintain excellent mechanical properties and dimensional stability in a high-temperature environment.

[0014] 2. The modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, adopts a low molecular weight polyolefin flow modifier with a specific melt index range (1-10 g / 10 min), and especially by compounding (1:1-5:1) of high and low melt index polyethylene, effectively reduces the melt viscosity of the ultra-high molecular weight polyethylene, and solves the problem of difficult injection molding of the traditional ultra-high molecular weight polyethylene.

[0015] 3. The modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, by the step-by-step compounding process, first realizes the distribution of the nano-scale modifier by spray dispersion, and then introduces the flow modifier to optimize the rheological properties, on the basis of retaining the high strength of the ultra-high molecular weight polyethylene, realizes the synergistic optimization of high melt flowability and excellent mechanical properties by precise regulation of the low molecular weight polyolefin, and the step-by-step blending design avoids the segregation of components caused by direct mixing.

[0016] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the application to achieve the predetermined application purpose, the following describes in detail a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material and a modification method according to the application by combining the drawings and specific embodiments.

[0019] The foregoing and other technical contents, features and effects of the present application will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. Through the description of the embodiments, the technical means and effects adopted by the present application to achieve the predetermined purposes can be understood more deeply and specifically. However, the accompanying drawings are provided for reference and illustration only, and are not intended to limit the technical solutions of the present application.

[0020] In a first aspect, the embodiments of the present application provide a modification method of a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, please refer to Figure 1 , Figure 1 The flow chart of the modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material provided by the embodiments of the present application is shown in Figure 1 The modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material of the present embodiment can include the following steps: Step 1: mixing fluorine-containing silane coupling agent, thermal initiator and crosslinking catalyst to obtain a mixed solvent.

[0021] Optionally, the mass ratio of the fluorine-containing silane coupling agent, the thermal initiator and the crosslinking catalyst is (1-10):1:3. Preferably, the mass ratio is (1-5):1:3.

[0022] In the present embodiment, the structural formula of the fluorine-containing silane coupling agent is: ; Wherein, R1, R2 and R3 are methoxy or ethoxy; Rf is , n is an integer from 1 to 10; X is one of methylene, ethylene and amino; X1 is one of perfluoromethylene, methylene, amino, ester and oxygen; Y is one of methyl, ethyl, propyl, amino, hydrogen and fluorine.

[0023] In the present embodiment, the thermal initiator is: dicumyl peroxide, benzoyl peroxide, diisopropylbenzene peroxide or 2,5-dimethyl-2,5-di-tert-butylperoxyhexane.

[0024] In the present embodiment, the crosslinking catalyst is: dibutyltin dilaurate, stannous octoate, bis(dodecylthio)dibutyltin or dibutyltin diacetate.

[0025] Step 2: blending and compounding the ultra-high molecular weight polyethylene resin with the mixed solvent by using spray dispersion to obtain an intermediate; Optionally, the mass of the mixed solvent is 0.1%-5% of the mass of the ultra-high molecular weight polyethylene resin.

[0026] In the present embodiment, the viscosity average molecular weight of the ultra-high molecular weight polyethylene resin is 1-7 million.

[0027] In the present embodiment, by the synergistic effect of the fluorine-containing silane coupling agent and the thermal initiator and the crosslinking catalyst, a crosslinking structure is introduced into the molecular chain of the ultra-high molecular weight polyethylene (UHMWPE), the surface modification and the crosslinking structure regulation of the ultra-high molecular weight polyethylene resin are realized in the spray dispersion process, the molecular chain slip under high temperature is effectively inhibited, the heat resistance of the fluorine-containing silane further delays the thermal degradation of the material, and the composite material can still maintain excellent mechanical properties and dimensional stability under high temperature environment.

[0028] Step 3: blending and compounding the intermediate with a low molecular weight polyolefin flow modifier to obtain a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material.

[0029] In the formula, the low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 1-5 g / 10 min and polyethylene with a melt index of 5-10 g / 10 min in a weight ratio of 1:1-5:1 under a load of 2.16 Kg.

[0030] Optionally, the mass ratio of the intermediate to the low molecular weight polyolefin flow modifier is 9:1-1:9. Preferably, the mass ratio is 8:2-6:4.

[0031] In the present embodiment, the low molecular weight polyolefin flow modifier with a specific melt index range (1-10 g / 10 min) is used, and especially by compounding (1:1-5:1) of high and low melt index polyethylene, the melt viscosity of the ultra-high molecular weight polyethylene is effectively reduced, and the problem of difficult injection molding of traditional ultra-high molecular weight polyethylene is solved.

[0032] The modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material of the embodiment of the present application realizes the synergistic optimization of high melt flowability and excellent mechanical properties by accurately regulating the low molecular weight polyolefin on the basis of retaining the high strength of the ultra-high molecular weight polyethylene, and the step-by-step blending design avoids the segregation of components caused by direct mixing.

[0033] Further, the performance of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material obtained by the modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material of the present application is described through specific embodiments.

[0034] Embodiment 1 A modification method of a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, comprising: Step 1: 3-(methacryloyloxy)perfluoropropylethyltrimethoxysilane, dicumyl peroxide and dibutyl tin dilaurate are mixed in a mass ratio of 2:1:3 to obtain a mixed solvent; Step 2: The ultrahigh molecular weight polyethylene resin with a viscosity average molecular weight of 3 million is blended and compounded with the mixed solvent by spray dispersion to obtain an intermediate, wherein the mass of the mixed solvent is 1.5% of the mass of the ultrahigh molecular weight polyethylene resin; Step 3: 7 parts of the intermediate are blended and compounded with 3 parts of the low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection-grade ultrahigh molecular weight polyethylene composite material, wherein the low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 2 g / 10 min and polyethylene with a melt index of 7 g / 10 min in a weight ratio of 2:1.

[0035] The high-temperature-resistant injection-grade ultrahigh molecular weight polyethylene composite material of Example 1 has a Vicat softening point of 149.8℃ after being injection molded into a standard product according to GB / T1633-2000, and a tensile strength of 37.2MPa according to GB / T1040.2-2006.

[0036] Example 2 A modification method of a high-temperature-resistant injection-grade ultrahigh molecular weight polyethylene composite material, comprising: Step 1: 2-(acryloyloxy)perfluoroethylmethyltrimethoxysilane, dicumyl peroxide and stannous octoate are mixed in a mass ratio of 1:1:3 to obtain a mixed solvent; Step 2: The ultrahigh molecular weight polyethylene resin with a viscosity average molecular weight of 2 million is blended and compounded with the mixed solvent by spray dispersion to obtain an intermediate, wherein the mass of the mixed solvent is 0.1% of the mass of the ultrahigh molecular weight polyethylene resin; Step 3: 8 parts of the intermediate are blended and compounded with 2 parts of the low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection-grade ultrahigh molecular weight polyethylene composite material, wherein the low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 1.5 g / 10 min and polyethylene with a melt index of 6 g / 10 min in a weight ratio of 1:1.

[0037] The high-temperature-resistant injection-grade ultrahigh molecular weight polyethylene composite material of Example 2 has a Vicat softening point of 147.3℃ after being injection molded into a standard product according to GB / T1633-2000, and a tensile strength of 35.3MPa according to GB / T1040.2-2006.

[0038] Example 3 A modification method of a high-temperature-resistant injection-grade ultrahigh molecular weight polyethylene composite material, comprising: Step 1: 2-(methacryloyloxy)perfluoroethyl ethyl trimethoxysilane, 2,5-dimethyl-2,5 di-tert-butyl peroxide and dibutyl tin diacetate are mixed according to a mass ratio of 5:1:3 to obtain a mixed solvent; Step 2: The ultrahigh molecular weight polyethylene resin with a viscosity average molecular weight of 5 million is blended and compounded with the mixed solvent by spray dispersion to obtain an intermediate, wherein the mass of the mixed solvent is 5% of the mass of the ultrahigh molecular weight polyethylene resin; Step 3: 6 parts of the intermediate are blended and compounded with 4 parts of the low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection molding grade ultrahigh molecular weight polyethylene composite material, wherein the low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 5 g / 10 min and polyethylene with a melt index of 10 g / 10 min according to a weight ratio of 2:1.

[0039] The high-temperature-resistant injection molding grade ultrahigh molecular weight polyethylene composite material of Example 3 has a Vicat softening point of 145.8°C after injection molding of a standard product according to GB / T1633-2000, and a tensile strength of 34.7 MPa according to GB / T1040.2-2006.

[0040] Example 4 A modification method of a high-temperature-resistant injection molding grade ultrahigh molecular weight polyethylene composite material, comprising: Step 1: 3-(methacryloyloxy)perfluoropropyl ethyl trimethoxysilane, benzoyl peroxide and di(dodecylthio) dibutyl tin are mixed according to a mass ratio of 3:1:3 to obtain a mixed solvent; Step 2: The ultrahigh molecular weight polyethylene resin with a viscosity average molecular weight of 7 million is blended and compounded with the mixed solvent by spray dispersion to obtain an intermediate, wherein the mass of the mixed solvent is 3% of the mass of the ultrahigh molecular weight polyethylene resin; Step 3: 1 part of the intermediate is blended and compounded with 9 parts of the low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection molding grade ultrahigh molecular weight polyethylene composite material, wherein the low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 2 g / 10 min and polyethylene with a melt index of 7 g / 10 min according to a weight ratio of 5:1.

[0041] Example 5 A modification method of a high-temperature-resistant injection molding grade ultrahigh molecular weight polyethylene composite material, comprising: Step 1: 3-(methacryloyloxy)perfluoropropyl ethyl trimethoxysilane, dicumyl peroxide and dibutyl tin dilaurate are mixed according to a mass ratio of 2:1:3 to obtain a mixed solvent; Step 2: blend and compound the ultra-high molecular weight polyethylene resin with a viscosity average molecular weight of 1 million with the mixed solvent by spray dispersion to obtain an intermediate, wherein the mass of the mixed solvent is 1.5% of the mass of the ultra-high molecular weight polyethylene resin; Step 3: blend and compound 9 parts of the intermediate with 1 part of the low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, wherein the low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 1 g / 10 min and polyethylene with a melt index of 5 g / 10 min in a weight ratio of 3:1.

[0042] Comparative Example 1 A method for preparing a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, comprising: Step 1: mix 3-(methacryloyloxy)propyltrimethoxysilane, dicumyl peroxide and dibutyltin dilaurate in a mass ratio of 2:1:3 to obtain a mixed solvent; Step 2: blend and compound the ultra-high molecular weight polyethylene resin with a viscosity average molecular weight of 3 million with the mixed solvent by spray dispersion to obtain an intermediate, wherein the mass of the mixed solvent is 1.5% of the mass of the ultra-high molecular weight polyethylene resin; Step 3: blend and compound 7 parts of the intermediate with 3 parts of the low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, wherein the low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 2.5 g / 10 min and polyethylene with a melt index of 7.5 g / 10 min in a weight ratio of 2:1.

[0043] The high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material of Comparative Example 1 has a Vicat softening point of 138.5℃ measured according to GB / T1633-2000 after being injection molded into a standard product, and a tensile strength of 28.5MPa measured according to GB / T1040.2-2006.

[0044] In a second aspect, an embodiment of the present application provides a high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material obtained by the modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material provided in the first aspect.

[0045] For specific contents and corresponding beneficial effects of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material, please refer to the related contents of the modification method of the high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material provided in the first aspect, which will not be repeated here.

[0046] It is to be understood that the terminology used herein such as first and second, and the like, is only intended to distinguish between one

[0047] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0048] The above is a further detailed description of the present application in conjunction with specific preferred embodiments, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For those skilled in the art, a number of simple deductions or replacements can be made without departing from the concept of the present application, which should be considered as falling within the scope of protection of the present application.

Claims

1. A method of modifying a high temperature resistant injection molding grade ultra-high molecular weight polyethylene composite material, characterized in that, The application relates to a modification method of a high-temperature-resistant injection-grade ultra-high molecular weight polyethylene composite material. Step 1: mixing a fluorine-containing silane coupling agent, a thermal initiator and a crosslinking catalyst to obtain a mixed solvent; Step 2: blending and compounding an ultra-high molecular weight polyethylene resin with the mixed solvent by using spray dispersion to obtain an intermediate; Step 3: blending and compounding the intermediate with a low molecular weight polyolefin flow modifier to obtain the high-temperature-resistant injection-grade ultra-high molecular weight polyethylene composite material; The low molecular weight polyolefin flow modifier is a mixture of polyethylene with a melt index of 1-5 g / 10 min and polyethylene with a melt index of 5-10 g / 10 min in a weight ratio of 1:1-5:1 under a 2.16 Kg load. The structure of the fluorine-containing silane coupling agent is shown in the description. ； wherein R1, R2and R3are methoxy or ethoxy; Rfis n is an integer from 1 to 10; X is one of methylene, ethylene and amino; X1is one of perfluoromethylene, methylene, amino, ester and oxygen; Y is one of methyl, ethyl, propyl, amino, hydrogen and fluorine.

2. The method of modifying a high temperature resistant injection molding grade ultra-high molecular weight polyethylene composite according to claim 1, characterized in that, The mass ratio of the fluorine-containing silane coupling agent, the thermal initiator and the crosslinking catalyst is (1-10):1:

3.

3. The method of modifying a high temperature resistant injection molding grade ultra-high molecular weight polyethylene composite according to claim 1, wherein, The mass of the mixed solvent is 0.1%-5% of the mass of the ultra-high molecular weight polyethylene resin.

4. The method of modifying a high temperature resistant injection molding grade ultra-high molecular weight polyethylene composite according to claim 1, wherein, The mass ratio of the intermediate and the low molecular weight polyolefin flow modifier is 9:1-1:

9.

5. The method of modifying a high temperature resistant injection molding grade ultra-high molecular weight polyethylene composite according to claim 1, wherein, The viscosity-average molecular weight of the ultra-high molecular weight polyethylene resin is 10-70 million.

6. The method of modifying a high temperature resistant injection molding grade ultra-high molecular weight polyethylene composite of claim 1, wherein, The thermal initiator is dicumyl peroxide, benzoyl peroxide, diisopropylbenzene peroxide or 2,5-dimethyl-2,5-di-tert-butylperoxyhexane.

7. The method of modifying a high temperature resistant injection molding grade ultra-high molecular weight polyethylene composite according to claim 1, wherein, The crosslinking catalyst is dibutyltin dilaurate, stannous octoate, bis(dodecylthio)dibutyltin or dibutyltin diacetate.

8. A high temperature resistant injection molded grade ultra-high molecular weight polyethylene composite material characterized in that, The high-temperature-resistant injection-grade ultra-high molecular weight polyethylene composite material is obtained by using the modification method.

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