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High-strength and high-toughness modified nylon 66 composite material and preparation method thereof

A modified nylon, high-strength and high-toughness technology, applied in the field of high-strength and high-toughness modified nylon 66 composite material and its preparation, can solve the problems of poor toughness, low impact performance and notched impact strength, insufficient strength, etc. Improve the dry and low temperature toughness, the effect of excellent comprehensive performance

Inactive Publication Date: 2016-08-24
SUZHOU HAOSHUN PLASTIC RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, nylon 66 and its existing modified materials still have the following disadvantages: 1. Compared with metal materials, the strength is still insufficient; 2. The toughness at low temperature and dry state is poor, and the impact performance and notched impact strength are low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-strength and high-toughness modified nylon 66 composite material, comprising the following components in parts by weight: 60 parts of nylon 66, 20 parts of composite toughening agent, 1 part of carbon nanotube, 10 parts of basalt fiber, 3 parts of nano-modifier, anti- 0.5 parts of oxygen agent, 5 parts of lubricant, 3 parts of coupling agent; among them,

[0023] The composite toughening agent is a mixture of silica gel powder and EPDM rubber grafted maleic anhydride in a mass ratio of 2:1;

[0024] The carbon nanotubes are surface hydroxylated multi-walled carbon nanotubes with a diameter of 50-80nm and a specific surface area of ​​80-150m 2 / g; the preparation method is: put the multi-walled carbon nanotubes into a ball mill jar, add 10 times the weight of a strong base (sodium hydroxide or potassium hydroxide), add ethanol with the same quality as the strong base, and ball mill for 15 hours Washing with deionized water until neutral, drying in vacuum to obtai...

Embodiment 2

[0032] A high-strength and high-toughness modified nylon 66 composite material, comprising the following components in parts by weight: 80 parts of nylon 66, 30 parts of composite toughening agent, 3 parts of carbon nanotubes, 30 parts of reinforcing fibers, 8 parts of nano-modifiers, 2 parts of oxygen agent, 10 parts of lubricant, 5 parts of coupling agent; wherein,

[0033] The composite toughening agent is a mixture of silica gel powder and EPDM rubber grafted maleic anhydride in a mass ratio of 3:1;

[0034] The carbon nanotubes are surface hydroxylated multi-walled carbon nanotubes with a diameter of 50-80nm and a specific surface area of ​​80-150m 2 / g; the preparation method is: immerse the multi-walled carbon nanotubes in a mixture of concentrated hydrochloric acid and concentrated nitric acid with a weight ratio of 4:3, first ultrasonic at 55-60°C and 80-100Hz for 1-3 hours, and then Reflux at 80-100°C for 2 hours, then wash with distilled water until neutral, and fi...

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Abstract

The invention discloses a high-strength and high-toughness modified nylon 66 composite material and a preparation method thereof. The high-strength and high-toughness modified nylon 66 composite material is prepared from, by weight, 60-80 parts of nylon 66, 20-30 parts of a composite toughening agent, 1-3 parts of carbon nanotubes, 10-30 parts of reinforced fibers, 3-8 parts of a nano modification agent, 0.5-2 parts of an antioxidant, 5-10 parts of a lubricant and 3-5 parts of a coupling agent. The preparation method of the composite material comprises the steps of 1 reinforced fiber modification, 2 preparation of toughening masterbatch, 3 extrusion for granulation and 4 injection molding. The dry state and low-temperature toughness of the nylon 66 composite material are effectively improved by using the composite toughening agent, the nano modification agent and a preparation process of the toughening masterbatch, and the rigidity of the composite material is effectively improved by modifying the reinforced fibers. The nylon 66 composite material has excellent comprehensive performance and wide market prospect and overcomes the shortcomings on the strength and toughness aspects of existing modified nylon 66.

Description

technical field [0001] The invention relates to the technical field of modified polyamide, in particular to a high-strength and high-toughness modified nylon 66 composite material and a preparation method thereof. Background technique [0002] PA66 is widely used in machinery, electronics, automobiles, chemicals, textiles and other fields due to its excellent mechanical properties, heat resistance, wear resistance, self-lubrication and other properties. With the economic growth and the improvement of living standards, the domestic demand for PA66 products is growing at an average annual growth rate of 15%, and its use is also expanding. It is a steel substitute plastic with broad application prospects. [0003] However, nylon 66 and its existing modified materials still have the following disadvantages: 1. Compared with metal materials, the strength is still insufficient; 2. The toughness at low temperature and dry state is poor, and the impact performance and notched impact...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L83/04C08L51/04C08L13/00C08K13/06C08K9/02C08K9/06C08K7/24C08K7/10C08K7/14C08J3/22
CPCC08L77/06C08J3/226C08J2377/06C08J2477/06C08K2201/003C08K2201/006C08K2201/011C08L2205/025C08L2205/035C08L83/04C08L51/04C08L13/00C08K13/06C08K9/06C08K9/02C08K7/24C08K7/10C08K7/14C08L51/003
Inventor 邹晓明
Owner SUZHOU HAOSHUN PLASTIC RUBBER CO LTD
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