CN113136101B - Nylon composite material for realizing high strength by using composite compatilizer and preparation method thereof - Google Patents

Abstract

The invention discloses a nylon composite material for realizing high strength by using a composite compatilizer and a preparation method thereof, belonging to the technical field of modification of high polymer materials. The composite material comprises nylon, a composite compatilizer and polyphenylene sulfide, wherein the mass ratio of the nylon to the polyphenylene sulfide is (2.1-5.6): 1; the nylon and the polyphenylene sulfide are compatible through a composite compatilizer; the composite compatilizer is a composite graft obtained by melt grafting reaction of polyphenylene sulfide, thermoplastic elastomer X and a grafting monomer, and the polyphenylene sulfide and the thermoplastic elastomer X in the composite graft are connected through chemical bonds. The added polyphenylene sulfide resin can greatly improve the rigidity and hydrophobicity of the nylon material, the compatibility of the polyphenylene sulfide and the nylon can be effectively improved by adding the composite compatilizer, and the hydrophobicity and strength of the composite material are effectively improved from the aspect of improving the compatibility of the polyphenylene sulfide and the nylon.

Description

A kind of nylon composite material and its preparation using composite compatibilizer to realize high strength method

technical field

The invention belongs to the technical field of polymer material modification, and more specifically relates to a high-strength nylon composite material using a composite compatibilizer and a preparation method thereof.

Background technique

With the development of lightweight notebook computers, ultra-thin has become the mainstream of its development. This not only needs to redesign the product structure of the notebook computer, but also needs to optimize the material because of its structural changes. This involves the keyboard.

There are many letter or symbol keys on the keyboard, and there is a support frame under the keys. Before the ultra-thin design, the supporting frame is made of polyoxymethylene (POM) material. After the ultra-thin design of the support frame, its thickness has been reduced to about 0.6mm. However, due to the strength of the POM material, after the ultra-thin design, the POM can no longer meet its use requirements. The designer optimized the material to be a stronger glass fiber reinforced nylon 66 material. However, due to the hydrophilic amide group in the molecular structure of nylon 66 resin, which has strong water absorption, the glass fiber reinforced nylon 66 material cannot pass the product verification under high temperature and high humidity environment, even if the glass fiber content is increased to 50 %or above.

After retrieval, the Chinese invention patent CN111040442A discloses a whisker-reinforced hydrophobic nylon 66 composite material and its preparation method; it specifically discloses that by firmly attaching hydrophobic polytetrafluoroethylene to the surface of calcium sulfate whiskers, as The filler is dispersed in nylon 66, and the hydrophobicity of polytetrafluoroethylene endows nylon 66 with a good hydrophobic effect. There is a problem of PTFE segregation, and calcium sulfate whiskers can effectively increase the strength of nylon 66. It can be seen that the composite material is filled with calcium sulfate whiskers attached to polytetrafluoroethylene, and the hydrophobicity of the filler is used to improve the hydrophobicity of the nylon composite material; but the composite material only uses conventional maleic anhydride grafted POE as the phase. Compatibilizer, so its lower strength may be due to the fact that the compatibility between PTFE and nylon 66 has not been effectively resolved, resulting in the phase between the high-strength calcium sulfate whiskers wrapped in PTFE and nylon 66. The compatibility is poor, and in the case of poor compatibility between material components, the strength and other mechanical properties of the prepared composite material will be obviously insufficient.

Based on the above reasons, there is an urgent need to improve the glass fiber reinforced nylon 66 material and design a high hydrophobic and high strength nylon composite material to meet its strength requirements in high temperature and high humidity environments.

Contents of the invention

1. The problem to be solved

Aiming at the problem of strong water absorption and reduced strength of nylon composite materials in the prior art under high-temperature and high-humidity environments, the present invention provides a nylon composite material that uses a composite compatibilizer to achieve high strength and a preparation method thereof; by combining PPS with The thermoplastic elastomer composite grafted polar monomers can better improve the compatibility between nylon and PPS, thereby effectively improving the hydrophobicity and strength of nylon composite materials, and solving the problem of poor water absorption in high-temperature and high-humidity environments. Strong, low-strength problems.

2. Technical solution

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A kind of nylon composite material utilizing composite compatibilizer to realize high strength of the present invention comprises nylon, composite compatibilizer and polyphenylene sulfide, and the mass ratio of nylon and polyphenylene sulfide is (2.1～5.6): 1; Said nylon and polyphenylene sulfide are compatible through a composite compatibilizer; said composite compatibilizer is a composite graft obtained by melting polyphenylene sulfide, thermoplastic elastomer X and graft monomer, The polyphenylene sulfide and the thermoplastic elastomer X in the composite graft are connected by chemical bonds.

Preferably, the graft monomer includes MAH, and MAH in the present invention refers to maleic anhydride; the proportion of the composite compatibilizer in the composite material is 3wt% to 6wt%, which includes PPS-X-g-MAH and/or X-PPS-g-MAH and/or MAH-g-X-PPS-g-MAH.

Preferably, the nylon includes nylon 66, and nylon 66 is medium-viscosity nylon 66 and/or low-viscosity nylon 66; the molecular weight of the polyphenylene sulfide is 40,000-50,000.

Preferably, the mass ratio of polyphenylene sulfide and thermoplastic elastomer X in the composite compatibilizer is (1.4-5.5): 1; polyphenylene sulfide and thermoplastic elastomer X in this mass ratio can be combined with nylon composite material The nylon and polyphenylene sulfide components in the compound match, and a nylon composite material with high compatibility can be obtained, which makes it exhibit excellent hydrophobicity and strength.

Preferably, the thermoplastic elastomer X comprises SBS and/or POE and/or EPDM and/or SEBS.

Preferably, glass fibers treated with a coupling agent are also included, and the mass ratio of glass fibers to nylon is (1.16-1.73):1.

A kind of preparation method of nylon composite material utilizing composite compatibilizer to realize high strength of the present invention, described composite material is the composite material described in the present invention, first prepares composite compatibilizer, then nylon, composite compatibilizer It is mixed with polyphenylene sulfide and produced by melt extrusion with twin-screw extruder.

Preferably, the specific preparation steps are:

(1) Preparation of composite compatibilizer: PPS accounting for 15wt% to 85wt%, thermoplastic elastomer of 15wt% to 85wt%, initiator of 0.1wt% to 0.3wt%, and grafting of 1wt% to 3wt% The monomers are mixed evenly in a mixer, and then poured into a twin-screw extruder to melt and extrude, and then pelletized and dried to obtain a composite compatibilizer. The processing temperature of each zone of the twin-screw extruder is 250 ° C to 295 ° C ℃;

(2) Preparation of composite materials: Nylon 66 accounting for 31.9wt% to 38.6wt%, 7wt% to 15wt% of PPS resin, 3wt% to 6wt% of composite compatibilizer, and 45wt% to 55wt% of glass fiber , 0.1wt% to 0.3wt% of antioxidant and 0.3wt% to 0.8wt% of lubricant are mixed uniformly in a mixer, then poured into a twin-screw extruder to melt and extrude, and then pelletized and dried to obtain a composite phase Compatible agent, wherein the processing temperature of each zone of the twin-screw extruder is 255°C to 295°C.

Preferably, the initiator in the (1) step includes dicumyl peroxide or 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexane; and/or the ( 2) The diameter of the glass fiber monofilament in the step is 10 μm to 13 μm; the antioxidant is a mixture of antioxidant 1098 and antioxidant S-9228, and its mass ratio is (1 to 2): 1; the lubricating The agent is a silicone compound or an amide compound.

Preferably, the processing temperature control of each zone of the twin-screw extruder includes the processing temperature control of the first zone to the ninth zone, and the processing temperature control of the first zone to the ninth zone is 255°C, 280°C, 290°C, 295°C, respectively. °C, 290 °C, 285 °C, 280 °C, 280 °C and 275 °C; the head temperature of the twin-screw extruder is 270 °C.

3. Beneficial effect

Compared with the prior art, the beneficial effects of the present invention are:

(1) A kind of nylon composite material utilizing composite compatibilizer of the present invention to realize high strength comprises nylon, composite compatibilizer and polyphenylene sulfide, and the mass ratio of nylon and polyphenylene sulfide is (2.1～5.6): 1; the nylon and polyphenylene sulfide are compatible through a composite compatibilizer; the composite compatibilizer is a composite graft obtained by melting and grafting polyphenylene sulfide, thermoplastic elastomer X and graft monomer The polyphenylene sulfide and the thermoplastic elastomer X in the composite graft are connected by chemical bonds. Through the above settings, the polyphenylene sulfide resin added to the nylon material only contains benzene rings and sulfur atoms in its molecular structure, and there is no amide group that reduces the rigidity of the material due to water absorption, so it is analyzed from the molecular structure. , the polyphenylene sulfide resin itself does not absorb water; in addition, because of the large aromatic benzene ring in the molecular structure of polyphenylene sulfide, its rigidity is much higher than that of the carbon-carbon chain (C-C) in aliphatic nylon; in addition, The addition of some polyphenylene sulfide also reduces the proportion of nylon in the entire material, so the addition of polyphenylene sulfide resin can greatly improve the rigidity and hydrophobicity of nylon materials; further, due to the relationship between nylon and polyphenylene sulfide The compatibility among them is poor, the present invention prepares above-mentioned composite compatibilizer by mixing polyphenylene sulfide, thermoplastic elastomer X and grafting monomer melt graft reaction, in this melt graft reaction, polyphenylene sulfide It can be combined with thermoplastic elastomer X through chemical bonds, and polyphenylene sulfide or thermoplastic elastomer X can also undergo grafting reaction with graft monomer to form polyphenylene sulfide, thermoplastic elastomer X and graft The composite graft of graft monomer composite graft effectively improves the hydrophobicity and strength of the composite material from the perspective of improving the compatibility of polyphenylene sulfide and nylon.

(2) A kind of nylon composite material utilizing composite compatibilizer of the present invention to realize high strength, described graft monomer comprises MAH; The proportion of described composite compatibilizer in composite material is 3wt%～6wt%, It includes PPS-X-g-MAH and/or X-PPS-g-MAH and/or MAH-g-X-PPS-g-MAH; It also includes glass fiber treated with coupling agent, and the mass ratio of glass fiber to nylon is ( 1.16～1.73): 1; The selected composite compatibilizer of the present invention is the composite graft that grafts simultaneously after PPS resin and thermoplastic elastomer X mix, and it is different with common single-component grafting reaction, in this grafting During the reaction, PPS-X-g-MAH, X-PPS-g-MAH and MAH-g-X-PPS-g-MAH were formed, which not only improved the compatibility between nylon and polyphenylene sulfide resin, but also MAH It can react with the coupling agent on the surface of glass fiber to further improve the bonding force between nylon, PPS and glass fiber, thereby improving the mechanical strength and rigidity of nylon composite materials; this is mainly due to the thermal decomposition of the initiator to generate free radicals, In this way, the hydrogen atoms on the thermoplastic elastomer X and PPS molecular chains are captured to form macromolecular free radicals, which can combine with MAH on the one hand to form a grafting reaction; on the other hand, the thermoplastic elastomer free radicals and PPS free radicals Reactions can also occur between them, and they can be combined in the form of chemical bonds to form the above-mentioned composite grafts.

detailed description

The proportions, sizes, etc. in this specification are only used to cooperate with the content disclosed in the specification for the understanding and reading of those who are familiar with this technology, and are not used to limit the conditions for the implementation of the present invention, so they have no technical significance , any modification of the structure, change of the proportional relationship or adjustment of the size shall still fall within the scope covered by the technical content disclosed in the present invention without affecting the effect and purpose of the present invention. . At the same time, terms such as "upper", "lower", "left", "right", and "middle" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation. The change or adjustment of the relative relationship shall also be regarded as the applicable scope of the present invention without substantially changing the technical content; in addition, the various embodiments of the present invention are not independent of each other, but can be combined of.

The present invention will be further described below in conjunction with specific embodiments.

Example 1

This embodiment provides a nylon composite material that uses a composite compatibilizer to achieve high strength. In terms of mass percentage, its raw materials are composed of the following components: 36.6wt% nylon 66 resin, 15wt% PPS resin, 3wt% composite compatibilizer, 45wt% glass fiber, 0.1wt% antioxidant, 0.3wt% lubricant; wherein the compatibilizer is calculated by mass percentage, and its raw material is composed of the following components: 13.9wt% PPS resin, 85wt% thermoplastic elastomer, 0.1wt% Initiator, 1 wt% grafting monomer. The nylon 66 is medium-viscosity nylon 66; the molecular weight of the PPS resin is 40,000 to 50,000; the diameter of the glass fiber monofilament is 13 microns; the antioxidant is antioxidant 1098 and antioxidant S -9228 mixture, its mass ratio is 1:1; the lubricant is silicone powder; the thermoplastic elastomer is SBS, so the composite compatibilizer of the present embodiment includes PPS-SBS-g-MAH, SBS-PPS-g-MAH and MAH-g-SBS-PPS-g-MAH; the initiator is dicumyl peroxide; the graft monomer is maleic anhydride.

This embodiment also provides a method for preparing a nylon composite material that utilizes a composite compatibilizer to achieve high strength: dry nylon 66, PPS resin, composite compatibilizer, antioxidant, lubricant in the stated mass percentage The ratio requires pre-mixing in the mixer to make a premix; then pour the premix into the main hopper, and the side feeding port is supplemented with a certain mass percentage of glass fiber to be melted and extruded by a twin-screw extruder After cutting and drying, a glass fiber reinforced nylon 66 composite material is finally made; the processing temperature control of each zone of the twin-screw extruder includes the processing temperature control of the first zone to the ninth zone, and the first zone to the ninth zone The processing temperature controls are 255°C, 280°C, 290°C, 295°C, 290°C, 285°C, 280°C, 280°C and 275°C respectively; the head temperature of the twin-screw extruder is 270°C.

Example 2

This embodiment provides a nylon composite material that uses a composite compatibilizer to achieve high strength. In terms of mass percentage, its raw materials are composed of the following components: 34.3wt% nylon 66 resin, 10wt% PPS resin, 5wt% composite compatibilizer, 50wt% glass fiber, 0.2wt% antioxidant, 0.5wt% lubricant; wherein the composite compatibilizer is calculated by mass percentage, and its raw material is composed of the following components: 57.8wt% PPS resin, 40wt% thermoplastic elastomer, 0.2wt% % initiator, 2wt% grafting monomer. The nylon 66 is low-viscosity nylon 66; the molecular weight of the PPS resin is 40,000 to 50,000; the diameter of the glass fiber monofilament is 10 microns; the antioxidant is antioxidant 1098 and antioxidant S -9228 mixture, its mass ratio is 1:1; the lubricant is TAF; the thermoplastic elastomer is POE, so the composite compatibilizer of this embodiment includes PPS-POE-g-MAH, POE- PPS-g-MAH and MAH-g-POE-PPS-g-MAH; the initiator is dicumyl peroxide; the graft monomer is maleic anhydride.

This embodiment also provides a method for preparing a nylon composite material that utilizes a composite compatibilizer to achieve high strength: dry nylon 66, PPS resin, composite compatibilizer, antioxidant, lubricant in the stated mass percentage The ratio requires pre-mixing in the mixer to make a premix; then pour the premix into the main hopper, and the side feeding port is supplemented with a certain mass percentage of glass fiber to be melted and extruded by a twin-screw extruder After cutting and drying, a glass fiber reinforced nylon 66 composite material is finally made; the processing temperature control of each zone of the twin-screw extruder includes the processing temperature control of the first zone to the ninth zone, and the first zone to the ninth zone The processing temperature controls are 255°C, 280°C, 290°C, 295°C, 290°C, 285°C, 280°C, 280°C and 275°C respectively; the head temperature of the twin-screw extruder is 270°C.

Example 3

This embodiment provides a nylon composite material that uses a composite compatibilizer to achieve high strength. In terms of mass percentage, its raw materials are composed of the following components: 31.9wt% nylon 66 resin, 7wt% PPS resin, 5wt% composite compatibilizer, 55wt% glass fiber, 0.3wt% antioxidant, 0.8wt% lubricant; wherein the composite compatibilizer is calculated by mass percentage, and its raw material is composed of the following components: 81.7wt% PPS resin, 15wt% thermoplastic elastomer, 0.3wt% % initiator, 3wt% grafting monomer. The nylon 66 is medium-viscosity nylon 66; the molecular weight of the PPS resin is 40,000 to 50,000; the diameter of the glass fiber monofilament is 13 microns; the antioxidant is antioxidant 1098 and antioxidant S -9228 mixture, its mass ratio is 1:1; the lubricant is silicone powder; the thermoplastic elastomer is EPDM, so the composite compatibilizer of the present embodiment includes PPS-EPDM-g-MAH, EPDM-PPS-g-MAH and MAH-g-EPDM-PPS-g-MAH; the initiator is dicumyl peroxide; the graft monomer is maleic anhydride.

This embodiment also provides a method for preparing a nylon composite material that utilizes a composite compatibilizer to achieve high strength: dry nylon 66, PPS resin, composite compatibilizer, antioxidant, lubricant in the stated mass percentage The ratio requires pre-mixing in the mixer to make a premix; then pour the premix into the main hopper, and the side feeding port is supplemented with a certain mass percentage of glass fiber to be melted and extruded by a twin-screw extruder After cutting and drying, a glass fiber reinforced nylon 66 composite material is finally made; the processing temperature control of each zone of the twin-screw extruder includes the processing temperature control of the first zone to the ninth zone, and the first zone to the ninth zone The processing temperature controls are 255°C, 280°C, 290°C, 295°C, 290°C, 285°C, 280°C, 280°C and 275°C respectively; the head temperature of the twin-screw extruder is 270°C.

Example 4

This embodiment provides a nylon composite material that uses a composite compatibilizer to achieve high strength. In terms of mass percentage, its raw materials are composed of the following components: 38.6wt% nylon 66 resin, 10wt% PPS resin, 6wt% composite compatibilizer, 45wt% glass fiber, 0.1wt% antioxidant, 0.3wt% lubricant; wherein the composite compatibilizer is calculated by mass percentage, and its raw material is composed of the following components: 68.9wt% PPS resin, 30wt% thermoplastic elastomer, 0.1wt% % initiator, 1 wt% grafting monomer. The nylon 66 is medium-viscosity nylon 66; the molecular weight of the PPS resin is 40,000 to 50,000; the diameter of the glass fiber monofilament is 13 microns; the antioxidant is antioxidant 1098 and antioxidant S -9228 mixture, its mass ratio is 1:1; the lubricant is silicone powder; the thermoplastic elastomer is SEBS, so the composite compatibilizer of the present embodiment includes PPS-SEBS-g-MAH, SEBS-PPS-g-MAH and MAH-g-SEBS-PPS-g-MAH; The initiator is 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane; the The graft monomer described is maleic anhydride.

This embodiment also provides a method for preparing a nylon composite material that utilizes a composite compatibilizer to achieve high strength: dry nylon 66, PPS resin, composite compatibilizer, antioxidant, lubricant in the stated mass percentage The ratio requires pre-mixing in the mixer to make a premix; then pour the premix into the main hopper, and the side feeding port is supplemented with a certain mass percentage of glass fiber to be melted and extruded by a twin-screw extruder After cutting and drying, a glass fiber reinforced nylon 66 composite material is finally made; the processing temperature control of each zone of the twin-screw extruder includes the processing temperature control of the first zone to the ninth zone, and the first zone to the ninth zone The processing temperature controls are 255°C, 280°C, 290°C, 295°C, 290°C, 285°C, 280°C, 280°C and 275°C respectively; the head temperature of the twin-screw extruder is 270°C.

Example 5

This embodiment provides a nylon composite material that uses a composite compatibilizer to achieve high strength. In terms of mass percentage, its raw materials are composed of the following components: 33.3wt% nylon 66 resin, 12wt% PPS resin, 4wt% composite compatibilizer, 50wt% glass fiber, 0.2wt% antioxidant, 0.5wt% lubricant; wherein the composite compatibilizer is calculated by mass percentage, and its raw material is composed of the following components: 37.8wt% PPS resin, 60wt% thermoplastic elastomer, 0.2wt% % initiator, 2wt% grafting monomer. The nylon 66 is medium-viscosity nylon 66; the molecular weight of the PPS resin is 40,000 to 50,000; the diameter of the glass fiber monofilament is 13 microns; the antioxidant is antioxidant 1098 and antioxidant S The mixture of -9228, its mass ratio is 2:1; Described lubricant is silicone powder; Described thermoplastic elastomer is SEBS, therefore the composite compatibilizer of the present embodiment comprises PPS-SEBS-g-MAH, SEBS-PPS-g-MAH and MAH-g-SEBS-PPS-g-MAH; the initiator is dicumyl peroxide; the graft monomer is maleic anhydride.

This embodiment also provides a method for preparing a nylon composite material that utilizes a composite compatibilizer to achieve high strength: dry nylon 66, PPS resin, composite compatibilizer, antioxidant, lubricant in the stated mass percentage The ratio requires pre-mixing in the mixer to make a premix; then pour the premix into the main hopper, and the side feeding port is supplemented with a certain mass percentage of glass fiber to be melted and extruded by a twin-screw extruder After cutting and drying, a glass fiber reinforced nylon 66 composite material is finally made; the processing temperature control of each zone of the twin-screw extruder includes the processing temperature control of the first zone to the ninth zone, and the first zone to the ninth zone The processing temperature controls are 255°C, 280°C, 290°C, 295°C, 290°C, 285°C, 280°C, 280°C and 275°C respectively; the head temperature of the twin-screw extruder is 270°C.

Comparative example 1

This comparative example provides a glass fiber reinforced nylon 66 material, the raw material of which is composed of the following components in terms of mass percentage: 44.7wt% nylon 66 resin, 55wt% glass fiber, 0.2wt% antioxidant, 0.5wt% lubricant. The nylon 66 is medium-viscosity nylon 66; the diameter of the glass fiber monofilament is 13 microns; the antioxidant is a mixture of antioxidant 1098 and antioxidant S-9228, and its mass ratio is 1: 1; the lubricant is silicone powder;

The preparation method is as follows: pre-mix the dried nylon 66, antioxidant and lubricant in a mixer according to the ratio of the mass percentage to obtain a premix; then pour the premix into the main The feeding hopper, the side feeding port and supplemented with a certain mass percentage of glass fiber are melted and extruded by a twin-screw extruder, and then pelletized and dried to finally make a glass fiber-reinforced nylon 66 material; the twin-screw extruder The processing temperature control of each zone includes the processing temperature control of the first zone to the ninth zone, and the processing temperature control of the first zone to the ninth zone is 250°C, 260°C, 270°C, 275°C, 270°C, 270°C, 265°C , 265°C and 260°C; the head temperature of the twin-screw extruder is 255°C.

Comparative example 2

This comparative example provides a glass fiber reinforced nylon 66 material, which is basically the same as that of Example 3, the difference being that the compatibilizer used in this comparative example is not a composite compatibilizer, but EPDM-g-MAH.

In the present invention, the nylon composite materials prepared in Examples 1 to 5 and Comparative Examples 1 to 2 have been tested for various properties: tensile strength, flexural strength, flexural modulus, Izod notched impact strength and product qualification certification, specifically The test results are shown in Table 1. Among them, the test method for product qualification certification is as follows: make various materials into a key support frame with a thickness of 0.6mm, and then install it on the keyboard, and then carry out vibration test, high temperature test and low temperature test on the keyboard in turn, and observe the keyboard after the test Whether the button operation is abnormal, if there is no abnormality, it is qualified. Vibration test: vibration at -40°C for 5 hours plus +60°C for 5 hours, repeat 24 cycles; high temperature test: place at 60°C and humidity 60% for 2 hours, then place at 85°C for 2 hours, Finally, place it at room temperature for 30 minutes; low temperature test: place it at 0°C for 2 hours, at -20°C for 2 hours, and at room temperature for 30 minutes; press the button to assemble the tested sample.

Table 1, various performance tests of the nylon composite materials prepared in Examples 1 to 5 and Comparative Examples 1 and 2

By comparing Examples 1 to 5 with Comparative Examples 1 and 2, it can be seen that under the action of lacking the composite compatibilizer and PPS of the present invention, the nylon composite material obtained is obviously unqualified, and wherein Comparative Example 2 uses a single The compatibilizer also can make the tensile strength of composite material, flexural strength and flexural modulus drop significantly, and this point also can be seen from the composite material disclosed by CN111040442A in background technology and the present invention; In addition, from embodiment 2 As can be seen from Example 3, under the condition of ensuring that the product is qualified, its tensile strength, flexural strength, flexural modulus, Izod notched impact strength are all at a relatively high level, and this is due to Example 2 and Example There is an appropriate mass ratio between polyphenylene sulfide and thermoplastic elastomer X in the composite compatibilizer of 3, and the appropriate mass ratio is (1.4-5.5): 1 described in the present invention, so compatibilization can be obtained Nylon composite materials with high resistance, so that nylon composite materials show excellent mechanical properties. In summary, for the nylon composite material of the present invention, by adding an appropriate number of PPS resins and composite compatibilizers, the problem that the rigidity of the nylon composite material decreases due to water absorption in a high-temperature and high-humidity environment can be effectively solved, especially for keyboards. Thin-walled products such as materials can still maintain high hydrophobicity and strength under low temperature and vibration environments, which further expands the application of the nylon composite material of the present invention.

The present invention has been described in detail above with reference to specific exemplary embodiments. However, it should be understood that various modifications and changes can be made without departing from the scope of the present invention as defined in the appended claims. The detailed description should be regarded as illustrative only, not restrictive, and if there are any such modifications and variations, they are intended to fall within the scope of the invention as described herein. In addition, the background art is intended to illustrate the research and development status and significance of the present technology, and is not intended to limit the present invention or the application and the application field of the present invention.

More specifically, although exemplary embodiments of the present invention have been described herein, the present invention is not limited to these embodiments but includes modifications, omissions, Any and all embodiments such as combinations, adaptations, and/or substitutions between the various embodiments. The definitions in the claims are to be interpreted broadly according to the language used in the claims and not limited to the examples described in the foregoing detailed description or during the prosecution of this application, which examples should be considered non-exclusive. Any steps recited in any method or process claims may be performed in any order and are not limited to the order presented in the claims. Accordingly, the scope of the present invention should be determined only by the appended claims and their legal equivalents, rather than by the description and examples given above.

Claims (7)

1. A nylon composite material utilizing composite compatibilizer to realize high strength is characterized in that, said composite material is made of 31.9wt%～38.6wt% nylon, 7wt%～15wt% polyphenylene sulfide, 3wt%～ 6wt% composite compatibilizer, 45wt%~55wt% glass fiber treated with coupling agent, 0.1wt%~0.3wt% antioxidant and 0.3wt%~0.8wt% lubricant, the nylon Compatible with polyphenylene sulfide through a composite compatibilizer; the composite compatibilizer consists of 57.8wt%~81.7wt% polyphenylene sulfide, 15wt%~40wt% thermoplastic elastomer X, 0.1wt%~0.3 wt% initiator and 1wt%~3wt% graft monomer, and the composite compatibilizer is a composite graft obtained by melt grafting reaction of polyphenylene sulfide, thermoplastic elastomer X and graft monomer The polyphenylene sulfide in the composite graft is connected with the thermoplastic elastomer X through a chemical bond, wherein the thermoplastic elastomer X is SBS, POE, EPDM or SEBS, and the graft monomer is MAH. 2. A kind of nylon composite material utilizing composite compatibilizer to realize high strength according to claim 1, characterized in that, said composite compatibilizer comprises PPS-X-g-MAH and/or X-PPS-g-MAH and/or MAH-g-X-PPS-g-MAH. 3. A nylon composite material utilizing a composite compatibilizer to achieve high strength according to claim 1, wherein the nylon comprises nylon 66, and the molecular weight of the polyphenylene sulfide is 40,000 to 50,000. 4. a method for preparing a nylon composite material utilizing a composite compatibilizer to realize high strength, the composite material is the composite material according to any one of claims 1 to 3, wherein the composite compatibilizer is first prepared, It is prepared by mixing nylon, compound compatibilizer, polyphenylene sulfide and glass fiber treated with coupling agent through twin-screw extruder. 5. a kind of nylon composite material preparation method utilizing composite compatibilizer to realize high strength according to claim 4, is characterized in that, concrete preparation steps are: (1) Preparation of composite compatibilizer: PPS with a proportion of 57.8wt%~81.7wt%, thermoplastic elastomer at 15wt%~40wt%, initiator at 0.1wt%~0.3wt%, and 1wt%~3wt% The grafted monomers are mixed evenly in a mixer, poured into a twin-screw extruder, melted and extruded, and then pelletized and dried to obtain a composite compatibilizer, wherein the processing temperature of each zone of the twin-screw extruder is 250°C ~295°C; (2) Preparation of composite materials: 31.9wt%~38.6wt% nylon 66, 7wt%~15wt% PPS resin, 3wt%~6wt% composite compatibilizer, 45wt%~55wt% glass fiber , 0.1wt%~0.3wt% of antioxidant and 0.3wt%~0.8wt% of lubricant are mixed evenly in the mixer, and then poured into the twin-screw extruder to melt and extrude, then pelletized and dried to obtain the composite phase Compatible agent, wherein the processing temperature of each zone of the twin-screw extruder is 255 ° C ~ 295 ° C. 6. A method for preparing a high-strength nylon composite material using a composite compatibilizer according to claim 5, wherein the initiator in the step (1) includes dicumyl peroxide or 2, 5-Dimethyl-2,5-bis(tert-butylperoxy)hexane; The diameter of the glass fiber monofilament in the step (2) is 10 μm-13 μm; the antioxidant is a mixture of antioxidant 1098 and antioxidant S-9228, and the mass ratio thereof is (1-2):1; The lubricant is a silicone compound or an amide compound. 7. A method for preparing a high-strength nylon composite material utilizing a composite compatibilizer according to claim 5, wherein the processing temperature control in each zone of the twin-screw extruder includes the processing of one zone to nine zones Temperature control, the processing temperature control of the first zone to the ninth zone is 255°C, 280°C, 290°C, 295°C, 290°C, 285°C, 280°C, 280°C and 275°C; the twin-screw extrusion The head temperature of the machine is 270°C.