Wear-resistant nylon bar and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, and discloses a wear-resistant nylon bar and a preparation method thereof. The nylon bar comprises the following raw materials in percentage by mass: 45-65% of nylon 6, 12-25% of glass fiber, 5-8% of nano silicon dioxide, 8-15% of a wear-resistant modifier, 4-8% of a flexibilizer, 0.5-2% of a silane coupling agent, 0.5-1.5% of a lubricant, 0.1-0.3% of an antioxidant and 0.5-2% of a heat stabilizer. According to the nylon bar, nylon 6 is used as a main material, and functional aids such as a wear-resistant modifier, a flexibilizer and glass fibers are added, so that the wear resistance of a matrix is improved; wherein the wear-resistant modifier has a microcapsule-like structure and can be broken when the base material is rubbed to release the internal modified base oil, so that the wear resistance is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and particularly relates to a wear-resistant nylon rod and a preparation method thereof. Background Art

[0002] Nylon, scientifically named Polyamide (PA), is an important type of thermoplastic engineering plastic. In many mechanical movements and industrial applications, friction and wear between components are one of the main reasons leading to equipment failure, performance degradation, increased energy consumption, and elevated maintenance costs. Especially under conditions of no lubrication (dry friction) or boundary lubrication, as well as in harsh working conditions with abrasive particles, dust, etc., the requirements for material wear resistance are particularly stringent. Although traditional metal materials have high strength, they have limitations in terms of wear resistance, friction reduction (low friction coefficient), anti-seizure property, and dependence on lubricants.

[0003] Pure nylon (such as PA6, PA66) has basic wear resistance, but under high load, high speed, high temperature, or extremely harsh dry friction conditions, its wear resistance is still insufficient. In an environment containing hard abrasive particles such as sand and metal chips, pure nylon may experience relatively fast abrasive wear, and in working conditions where friction generates significant heat, the increase in surface temperature of the material will cause a decrease in strength and modulus, exacerbating plastic deformation and wear, etc. Therefore, it is necessary to develop a nylon rod with excellent self-lubricity and wear resistance to overcome the limitations of pure nylon in terms of wear resistance and meet the more demanding industrial application requirements. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a wear-resistant nylon rod and a preparation method thereof.

[0005] The object of the present invention can be achieved by the following technical solutions: A wear-resistant nylon rod, comprising raw materials in the following mass percentages: 45 - 65% of nylon 6, 12 - 25% of glass fiber, 5 - 8% of nano-silica, 8 - 15% of wear-resistant modifier, 4 - 8% of toughening agent, 0.5 - 2% of silane coupling agent, 0.5 - 1.5% of lubricant, 0.1 - 0.3% of antioxidant, and 0.5 - 2% of heat stabilizer; Further, the toughening agent is maleic anhydride grafted POE; Further, the silane coupling agent is one of KH550 or KH560; Further, the lubricant is silicone masterbatch; Further, the antioxidant is one of antioxidant 1010, antioxidant 1098, or antioxidant 1076; Further, the heat stabilizer is a copper salt-based heat stabilizer; The wear-resistant modifier is prepared by the following steps: Step A1: Add 5,6-dimethylbenzimidazole, 10-chloro-1-decanol, tetrabutylammonium bromide, sodium hydroxide and water into a grinding tank, then add 12 stainless steel balls with a diameter of 5-9 mm, grind in a planetary ball mill at 350-450 rpm for 1-2 h, wash, filter and dry to obtain the benzimidazole derivative. Further, in step A1, the dosage ratio of 5,6-dimethylbenzimidazole, 10-chloro-1-decanol, tetrabutylammonium bromide, sodium hydroxide and water is 0.1-0.2 mol: 0.12-0.24 mol: 0.0015-0.003 mol: 0.75-1.5 g: 2-4 mL. Step A2: Add the benzimidazole derivative and boric acid into toluene, mix and stir evenly, and heat to 100-110 °C for reflux reaction for 6-8 h, then carry out reduced pressure distillation and drying to obtain the modified additive. Further, in step A2, the dosage ratio of the benzimidazole derivative, boric acid and toluene is 0.03-0.09 mol: 0.01-0.03 mol: 200 mL. Step A3: Add the modified additive into the base oil PAO, mix and stir evenly to obtain the modified base oil; mix the modified base oil and polyethersulfone (PES) evenly in dichloromethane to obtain mixture 1; stir gelatin and water in a 70 °C water bath at a speed of 300-500 rpm for 30-50 min, then cool down to 30 °C, stir at a speed of 700-800 rpm, and add mixture 1 dropwise within 20-30 min, then heat up to 40 °C and stir at a speed of 400 rpm for 3-5 h, centrifuge, wash and dry to obtain PES@base oil. Further, in step A3, the dosage ratio of gelatin, water and mixture 1 is 2-6 g: 100 g: 20 mL. Further, in mixture 1 in step A3, the dosage ratio of the modified base oil, PES and dichloromethane is 0.6-1 g: 1 g: 20 mL. Further, the addition amount of the modified additive in the modified base oil in step A3 is 0.5 wt%-1.5 wt%, and the rest is the base oil PAO. Step A4: Mix maleic anhydride evenly in benzene, add styrene and PES@base oil, under the condition of nitrogen, heat to 45-55 °C, slowly dropwise add benzoyl peroxide benzene solution, then heat up to 75-85 °C and stir for reaction for 3.5-4.5 h, filter, wash and dry to obtain the wear-resistant modifier. Further, in step A4, the dosage ratio of maleic anhydride, benzene, styrene, PES@base oil, and benzoyl peroxide benzene solution is 0.01 - 0.02 mol: 100 mL: 0.01 - 0.022 mol: 5 - 10 g: 5 mL; Further, in the benzoyl peroxide benzene solution described in step A4, the dosage ratio of benzoyl peroxide and benzene is 0.001 - 0.003 g: 5 mL.

[0006] A preparation method of a wear-resistant nylon rod includes the following steps: Step S1: Weigh raw materials by mass percentage, mix nylon 6, a wear-resistant modifier, and a toughening agent evenly in a blender, and then add nano-silica, a silane coupling agent, a lubricant, an antioxidant, and a heat stabilizer and mix and stir evenly to obtain a premix; Step S2: Feed the premix into the main feeding port of a twin-screw extruder, feed glass fiber into the side feeding port, and then extrude, cool, pelletize, and homogenize after melting to obtain a wear-resistant nylon rod; Further, in step S2, the rotation speed of the twin-screw extruder is 400 - 600 rpm, the temperature of the feeding section is 230°C - 250°C, the temperature of the melting section is 265°C - 285°C, and the temperature of the head section is 255°C - 265°C.

[0007] The beneficial effects of the present invention: The nylon rod in the present invention uses nylon 6 as the main material, and adds functional additives such as a wear-resistant modifier, a toughening agent, and glass fiber, which improves the wear resistance of the matrix; among them, the wear-resistant modifier has a structure similar to a microcapsule, and can rupture when the matrix material is rubbed, releasing the modified base oil inside to achieve wear resistance.

[0008] The wear-resistant modifier prepared by the present invention is different from traditional lubricants. Existing in a complete state in the matrix can ensure that it exerts the maximum lubrication effect and reduces its influence on other properties of the matrix. In addition, the addition of a small amount of silicone masterbatch lubricant in the nylon rod of the present invention is mainly used to improve processing fluidity and reduce friction and wear between the matrix and processing equipment.

[0009] The wear-resistant modifier prepared by the present invention has a structure similar to that of microcapsules, including an internal modified base oil, a sub-outer polyethersulfone layer, and an outermost functional polymer. During the friction process, this structure will be broken under the action of frictional force and frictional heat to release the internal modified base oil to the friction interface to participate in the lubrication, forming a lubricating oil film at the friction interface, avoiding direct contact between the friction object and the matrix material, and the cavity of the microcapsule after release can collect wear debris to prevent it from causing secondary damage to the friction interface. A modified additive is introduced into the internal modified base oil, and the modified additive contains a borate structure and a benzimidazole structure. The synergistic effect of the two improves the wear resistance and thermal stability of the modified base oil in the matrix, and reduces the volatilization of the internal base oil during high-temperature processing; the sub-outer polyethersulfone coats the modified base oil by solvent evaporation, with good sealing and thermal stability; the outermost functional polymer contains a rigid benzene ring and maleic anhydride, and this polymer can limit the movement of the polyethersulfone molecular chains in the sub-outer layer at high temperature, thereby inhibiting the decomposition of the wear-resistant modifier during high-temperature processing and reducing the phenomenon of performance degradation of the wear-resistant agent in nylon materials due to high processing temperature. In addition, the maleic anhydride group in the molecular chain of the outermost polymer can also improve the dispersibility of the wear-resistant modifier in the matrix, further improving the wear resistance of the matrix. Detailed implementation mode

[0010] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0011] Example 1: The wear-resistant modifier is prepared by the following steps: Step A1: Add 0.1 mol of 5,6-dimethylbenzimidazole, 0.12 mol of 10-chloro-1-decanol, 0.0015 mol of tetrabutylammonium bromide, 0.75 g of sodium hydroxide and 2 mL of water into a grinding jar, then add 12 5-mm stainless steel balls, and grind in a planetary ball mill at 350 rpm for 1 h, wash, filter and dry to obtain the benzimidazole derivative. Step A2: Add 0.03 mol of the benzimidazole derivative and 0.01 mol of boric acid into 200 mL of toluene, mix and stir evenly, and heat to 100 °C for reflux reaction for 6 h, carry out reduced pressure distillation and drying to obtain the modified additive. Step A3: Add the modified additive to the base oil PAO and mix and stir evenly to obtain the modified base oil; Mix 0.6 g of the modified base oil and 1 g of polyethersulfone (PES) evenly in 20 mL of dichloromethane to obtain mixture 1; Mix 2 g of gelatin and 100 g of water, stir at a speed of 300 rpm in a 70 °C water bath for 30 min, then cool down to 30 °C, stir at a speed of 700 rpm, and finish dropping mixture 1 within 20 min. Then heat up to 40 °C and stir at a speed of 400 rpm for 3 h, centrifuge, wash, and dry to obtain PES@base oil, where the addition amount of the modified additive in the modified base oil is 0.5 wt%, and the rest is base oil PAO; Step A4: Mix 0.01 mol of maleic anhydride evenly in 100 mL of benzene, add 0.01 mol of styrene and 5 g of PES@base oil. Under nitrogen conditions, heat to 45 °C, slowly drop 5 mL of benzoyl peroxide benzene solution, then heat up to 75 °C and stir and react for 3.5 h, filter, wash, and dry to obtain the wear-resistant modifier, where the dosage ratio of benzoyl peroxide to benzene in the benzoyl peroxide benzene solution is 0.001 g:5 mL.

[0012] Example 2: The wear-resistant modifier is prepared by the following steps: Step A1: Add 0.15 mol of 5,6-dimethylbenzimidazole, 0.18 mol of 10-chloro-1-decanol, 0.0023 mol of tetrabutylammonium bromide, 1.3 g of sodium hydroxide, and 3 mL of water to a grinding jar, then add 12 7-mm stainless steel balls, grind in a planetary ball mill at 400 rpm for 1.5 h, wash, filter, and dry to obtain the benzimidazole derivative; Step A2: Add 0.06 mol of the benzimidazole derivative and 0.02 mol of boric acid to 200 mL of toluene, mix and stir evenly, and heat to 105 °C for reflux reaction for 7 h, carry out vacuum distillation and dry to obtain the modified additive; Step A3: Add the modified additive to the base oil PAO and mix and stir evenly to obtain the modified base oil; Mix 0.8 g of the modified base oil and 1 g of polyethersulfone (PES) evenly in 20 mL of dichloromethane to obtain mixture 1; Mix 4 g of gelatin and 100 g of water, stir at a speed of 400 rpm in a 70 °C water bath for 40 min, then cool down to 30 °C, stir at a speed of 750 rpm, and finish dropping mixture 1 within 25 min. Then heat up to 40 °C and stir at a speed of 400 rpm for 4 h, centrifuge, wash, and dry to obtain PES@base oil, where the addition amount of the modified additive in the modified base oil is 1.0 wt%, and the rest is base oil PAO; Step A4: Mix 0.015 mol of maleic anhydride evenly in 100 mL of benzene, add 0.016 mol of styrene and 7.5 g of PES@base oil. Under nitrogen conditions, heat to 50 °C, slowly dropwise add 5 mL of benzoyl peroxide benzene solution, then raise the temperature to 80 °C and stir for 4 h. Filter, wash, and dry to obtain the wear-resistant modifier, where the dosage ratio of benzoyl peroxide to benzene in the benzoyl peroxide benzene solution is 0.002 g:5 mL.

[0013] Example 3: The wear-resistant modifier is prepared by the following steps: Step A1: Add 0.2 mol of 5,6-dimethylbenzimidazole, 0.24 mol of 10-chloro-1-decanol, 0.003 mol of tetrabutylammonium bromide, 1.5 g of sodium hydroxide, and 4 mL of water into a grinding jar, then add 12 9-mm stainless steel balls, grind in a planetary ball mill at 450 rpm for 2 h, wash, filter, and dry to obtain the benzimidazole derivative. Step A2: Add 0.09 mol of benzimidazole derivative and 0.03 mol of boric acid into 200 mL of toluene, mix and stir evenly, and heat to 110 °C for reflux reaction for 8 h. Distill under reduced pressure and dry to obtain the modified additive. Step A3: Add the modified additive into the base oil PAO, mix and stir evenly to obtain the modified base oil; mix 1 g of the modified base oil and 1 g of polyethersulfone (PES) evenly in 20 mL of dichloromethane to obtain mixture 1; mix 6 g of gelatin and 100 g of water, stir at 500 rpm in a 70 °C water bath for 50 min, then cool to 30 °C, stir at 800 rpm, and add mixture 1 dropwise within 30 min. Then raise the temperature to 40 °C and stir at 400 rpm for 5 h. Centrifuge, wash, and dry to obtain PES@base oil, where the addition amount of the modified additive in the modified base oil is 1.5 wt%, and the rest is base oil PAO. Step A4: Mix 0.02 mol of maleic anhydride evenly in 100 mL of benzene, add 0.022 mol of styrene and 10 g of PES@base oil. Under nitrogen conditions, heat to 55 °C, slowly dropwise add 5 mL of benzoyl peroxide benzene solution, then raise the temperature to 85 °C and stir for 4.5 h. Filter, wash, and dry to obtain the wear-resistant modifier, where the dosage ratio of benzoyl peroxide to benzene in the benzoyl peroxide benzene solution is 0.003 g:5 mL.

[0014] Example 4: A preparation method of a wear-resistant nylon rod includes the following steps: 65% Nylon 6, 16.4% glass fiber, 5% nano-silica, 8% wear-resistant modifier prepared in Example 1, 4% maleic anhydride grafted POE, 0.5% silane coupling agent KH550, 0.5% silicone masterbatch, 0.1% antioxidant 1010, 0.5% copper salt heat stabilizer; Step S1: Weigh the raw materials according to the mass percentage. Mix nylon 6, the wear-resistant modifier prepared in Example 1, and maleic anhydride grafted POE evenly in a blender, and then add nano-silica, silane coupling agent KH550, silicone masterbatch, antioxidant 1010, and copper salt heat stabilizer and mix and stir evenly to obtain a premix; Step S2: Feed the premix into the main feeding port of a twin-screw extruder, then feed the glass fiber into the side feeding port, and then extrude, cool, pelletize, and homogenize after melting to obtain a wear-resistant nylon rod. The rotation speed of the twin-screw extruder is 400 rpm, the temperature of the feeding section is 230 °C, the temperature of the melting section is 265 °C, and the temperature of the head section is 255 °C.

[0015] Example 5: A method for preparing a wear-resistant nylon rod includes the following steps: 54.3% Nylon 6, 18% glass fiber, 6.5% nano-silica, 12% wear-resistant modifier prepared in Example 2, 6% maleic anhydride grafted POE, 1% silane coupling agent KH560, 1% silicone masterbatch, 0.2% antioxidant 1098, 1% copper salt heat stabilizer; Step S1: Weigh the raw materials according to the mass percentage. Mix nylon 6, the wear-resistant modifier prepared in Example 2, and maleic anhydride grafted POE evenly in a blender, and then add nano-silica, silane coupling agent KH560, silicone masterbatch, antioxidant 1098, and copper salt heat stabilizer and mix and stir evenly to obtain a premix; Step S2: Feed the premix into the main feeding port of a twin-screw extruder, then feed the glass fiber into the side feeding port, and then extrude, cool, pelletize, and homogenize after melting to obtain a wear-resistant nylon rod. The rotation speed of the twin-screw extruder is 500 rpm, the temperature of the feeding section is 240 °C, the temperature of the melting section is 275 °C, and the temperature of the head section is 260 °C.

[0016] Example 6: A method for preparing a wear-resistant nylon rod includes the following steps: 45% Nylon 6, 22.7% glass fiber, 6% nano-silica, 15% wear-resistant modifier prepared in Example 3, 6% maleic anhydride grafted POE, 1.5% silane coupling agent KH550, 1.5% silicone masterbatch, 0.3% antioxidant 1076, 2% copper salt heat stabilizer; Step S1: Weigh the raw materials by mass percentage. Mix nylon 6, the wear-resistant modifier prepared in Example 3, and maleic anhydride grafted POE evenly in a blender, and then add nano-silica, silane coupling agent KH550, silicone masterbatch, antioxidant 1076, and copper salt heat stabilizer and mix and stir evenly to obtain the premix. Step S2: Feed the premix into the main feeding port of a twin-screw extruder, and feed glass fiber into the side feeding port. Then, after melting, extrude, cool, pelletize, and homogenize to obtain the wear-resistant nylon rod. The rotation speed of the twin-screw extruder is 600 rpm, the temperature of the feeding section is 250 °C, the temperature of the melting section is 285 °C, and the temperature of the head section is 265 °C.

[0017] Comparative Example 1: This comparative example is a nylon rod. The difference from Example 6 is that the wear-resistant agent prepared by the following steps is used instead of the wear-resistant modifier prepared in Example 3, and the rest are the same. The above-mentioned wear-resistant agent is prepared by the following steps: Step A1: Mix 1 g of base oil PAO and 1 g of polyethersulfone (PES) evenly in 20 mL of dichloromethane to obtain mixture 1. Stir 6 g of gelatin and 100 g of water in a water bath at 70 °C at a rotation speed of 500 rpm for 50 min, then cool down to 30 °C, stir at a rotation speed of 800 rpm, and add mixture 1 dropwise within 30 min. Then, heat up to 40 °C and stir at a rotation speed of 400 rpm for 5 h, centrifuge, wash, and dry to obtain PES@base oil. Step A2: Mix 0.02 mol of maleic anhydride evenly in 100 mL of benzene, add 0.022 mol of styrene and 10 g of PES@base oil. Under nitrogen conditions, heat to 55 °C, slowly dropwise add 5 mL of benzoyl peroxide benzene solution, then heat up to 85 °C and stir and react for 4.5 h. Filter, wash, and dry to obtain the wear-resistant agent, where the dosage ratio of benzoyl peroxide to benzene in the benzoyl peroxide benzene solution is 0.003 g:5 mL.

[0018] Comparative Example 2: This comparative example is a nylon rod. The difference from Example 6 is that the PES@base oil prepared in Example 3 is used instead of the wear-resistant modifier prepared in Example 3, and the rest are the same.

[0019] Perform performance tests on the nylon rods prepared in Examples 4-6 and Comparative Examples 1-2: Wear resistance test: Test the friction coefficient of the specimen according to the ISO 8295 standard; the wear amount is tested according to the ISO 9352-2012 standard. Thermal stability test: Use a thermogravimetric analyzer to test the decomposition temperature T of the wear-resistant modifiers in Examples 4-6 and Comparative Examples 1-2 5%(Initial decomposition temperature), the test temperature was 30 - 700 °C, the heating rate was 10 °C / min, and the test environment was argon; The test results are shown in Table 1: Table 1: Performance test results

[0020] As can be seen from Table 1, after the wear resistance test of the nylon rod prepared by the present invention, the friction coefficient is in the range of (0.08 - 0.09), and the wear amount is in the range of (5.6 - 5.9)%, indicating that the nylon rod has excellent wear resistance; after the thermal decomposition temperature test, the initial decomposition temperature is in the range of (395.4 - 396.9) °C. Combining with the wear resistance test results, it can be known that the wear-resistant modifier prepared by the present invention has better thermal stability, and further makes the nylon rod prepared by melt blending of each component material at high temperature have better wear resistance.

[0021] The above content is only an example and explanation of the concept of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the scope defined by the concept of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A wear-resistant nylon rod, characterized in that, It comprises raw materials in the following mass percentages: 45 - 65% of nylon 6, 12 - 25% of glass fiber, 5 - 8% of nano - silica, 8 - 15% of wear - resistant modifier, 4 - 8% of toughening agent, 0.5 - 2% of silane coupling agent, 0.5 - 1.5% of lubricant, 0.1 - 0.3% of antioxidant, and 0.5 - 2% of heat stabilizer; The wear - resistant modifier is prepared by polymerizing and coating maleic anhydride and styrene on PES@base oil. The PES@base oil is prepared by coating and modifying the base oil with polyethersulfone by the solvent evaporation method. The modified base oil is prepared by mixing a modified additive and base oil PAO. The modified additive is prepared by reacting a benzimidazole derivative and boric acid. The benzimidazole derivative is prepared by grinding and reacting 5,6 - dimethylbenzimidazole and 10 - chloro - 1 - decanol.

2. The wear-resistant nylon rod according to claim 1, characterized in that, The wear - resistant modifier is prepared by the following steps: Step A1: Add 5,6 - dimethylbenzimidazole, 10 - chloro - 1 - decanol, tetrabutylammonium bromide, sodium hydroxide, and water into a grinding tank, then add 12 stainless steel balls with a diameter of 5 - 9 mm, and grind in a planetary ball mill at 350 - 450 rpm for 1 - 2 h, wash, filter, and dry to obtain the benzimidazole derivative; Step A2: Add the benzimidazole derivative and boric acid into toluene, mix and stir evenly, and heat to 100 - 110 °C for reflux reaction for 6 - 8 h, carry out vacuum distillation and dry to obtain the modified additive; Step A3: Add the modified additive into base oil PAO, mix and stir evenly to obtain the modified base oil; mix the modified base oil and polyethersulfone evenly in dichloromethane to obtain mixture 1; stir gelatin and water in a 70 °C water bath at a speed of 300 - 500 rpm for 30 - 50 min, then cool to 30 °C, stir at a speed of 700 - 800 rpm, and add mixture 1 dropwise within 20 - 30 min, then heat to 40 °C and stir at a speed of 400 rpm for 3 - 5 h, centrifuge, wash, and dry to obtain PES@base oil; Step A4: Mix maleic anhydride evenly in benzene, add styrene and PES@base oil, under nitrogen conditions, heat to 45 - 55 °C, slowly dropwise add a benzoyl peroxide benzene solution, then heat to 75 - 85 °C and stir for reaction for 3.5 - 4.5 h, filter, wash, and dry to obtain the wear - resistant modifier.

3. A wear-resistant nylon rod according to claim 2, characterized in that, In step A1, the dosage ratio of 5,6 - dimethylbenzimidazole, 10 - chloro - 1 - decanol, tetrabutylammonium bromide, sodium hydroxide, and water is 0.1 - 0.2 mol:0.12 - 0.24 mol:0.0015 - 0.003 mol:0.75 - 1.5 g:2 - 4 mL.

4. A wear-resistant nylon rod according to claim 2, characterized in that In step A2, the dosage ratio of the benzimidazole derivative, boric acid, and toluene is 0.03 - 0.09 mol:0.01 - 0.03 mol:200 mL.

5. A wear-resistant nylon rod according to claim 2, characterized in that, In step A3, the dosage ratio of gelatin, water and mixture 1 is 2-6 g: 100 g: 20 mL. In the mixture 1, the dosage ratio of the modified base oil, PES and dichloromethane is 0.6-1 g: 1 g: 20 mL. The addition amount of the modifying additive in the modified base oil is 0.5 wt%-1.5 wt%, and the rest is the base oil PAO.

6. A wear-resistant nylon rod according to claim 2, characterized in that, In step A4, the dosage ratio of maleic anhydride, benzene, styrene, PES@base oil and benzoyl peroxide benzene solution is 0.01-0.02 mol: 100 mL: 0.01-0.022 mol: 5-10 g: 5 mL.

7. An abrasion-resistant nylon rod according to claim 2, characterized in that, In the benzoyl peroxide benzene solution in step A4, the dosage ratio of benzoyl peroxide and benzene is 0.001-0.003 g: 5 mL.

8. An abrasion-resistant nylon rod according to claim 1, characterized in that, The toughening agent is maleic anhydride grafted POE, the silane coupling agent is one of KH550 or KH560, the lubricant is silicone masterbatch, the antioxidant is one of antioxidant 1010, antioxidant 1098 or antioxidant 1076, and the heat stabilizer is a copper salt heat stabilizer.

9. A method for preparing the wear-resistant nylon rod according to any one of claims 1-8, characterized in that, It includes the following steps: Step S1: Weigh the raw materials by mass percentage, mix nylon 6, the wear-resistant modifier and the toughening agent evenly in a blender, and then add nano-silica, the silane coupling agent, the lubricant, the antioxidant and the heat stabilizer and mix and stir evenly to obtain the premix. Step S2: Put the premix into the main feeding port of a twin-screw extruder, put the glass fiber into the side feeding port, and then extrude, cool, pelletize and homogenize after melting to obtain the wear-resistant nylon bar.

10. The preparation method of a wear-resistant nylon rod according to claim 9, characterized in that, In step S2, the rotation speed of the twin-screw extruder is 400-600 rpm, the temperature of the feeding section is 230°C-250°C, the temperature of the melting section is 265°C-285°C, and the temperature of the head section is 255°C-265°C.

Images