Reinforced wear-resistant nylon 66 composite material and preparation method thereof

A composite material and nylon technology, applied in the field of enhanced wear-resistant nylon 66 composite material and its preparation, can solve the problems of high glass fiber wear-resistant agent addition, increased composite material density, poor interface force, etc., and achieve good mechanical properties , Improve compatibility, good dimensional stability

Inactive Publication Date: 2014-12-31
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In terms of reinforced modification of nylon 66, commonly used fibers such as glass fiber and carbon fiber are mainly added by melt blending method. The interface performance is poor, and if it is necessary to obtain a composite material with better wear resistance, it is necessary to add fillers such as wear-resistant agents
Chinese patent CN101182388A discloses a high wear-resistant and high-rigidity reinforced nylon 66 composite material prepared by a melt blending method. Its glass fiber and wear-resistant agent are added in a high amount. On the one hand, the high addition of glass fiber greatly increases the density of the composite material, which is difficult to use on some lightweight equipment
[0005] At present, the preparation of aramid pulp reinforced nylon 66 composites by in-situ polymerization has not been reported.

Method used

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  • Reinforced wear-resistant nylon 66 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Weigh 100 parts by weight of nylon 66 salt, 8 parts by weight of aramid fiber 1414 pulp with a length of 0.5-1.5mm and a water content of 5%-12%, 0.5 parts by weight of acetic acid, and mix the above Components are added to the autoclave;

[0031] 2) Weigh 50 parts by weight of deionized water and 0.1 parts by weight of nano-titanium dioxide and dissolve them in deionized water to prepare a solution. Stir the prepared solution under ultrasound for 1-2 hours, and then add it to the high pressure In the reactor;

[0032] 3) Replace the air in the high-pressure reactor with nitrogen for at least three times, and then pass in nitrogen as a reaction protection gas; keep the pressure at 1.7MPa and 230°C for 2 hours, then release the pressure to normal pressure, and raise the temperature at the same time , the temperature does not exceed 280°C, react at normal pressure for 30 minutes, and vacuumize for 30 minutes, discharge and pelletize.

Embodiment 2

[0034] 1) Weigh 100 parts by weight of nylon 66 salt, 1 part by weight of aramid fiber 1414 pulp with a length of 0.5-1.5mm and a water content of 5%-12%, 0.1 parts by weight of acetic acid, and mix the above Components are added to the autoclave;

[0035] 2) Weigh 30 parts by weight of deionized water and 0.02 parts by weight of nano-titanium dioxide and dissolve them in deionized water to prepare a solution. Stir the prepared solution under ultrasound for 1-2 hours, and then add it to the high pressure In the reactor;

[0036] 3) Replace the air in the high-pressure reactor with nitrogen for at least three times, and then pass in nitrogen as a reaction protection gas; keep the pressure at 1.5MPa and 210°C for 2 hours, then release the pressure to normal pressure, and raise the temperature at the same time , the temperature does not exceed 280°C, react at normal pressure for 30 minutes, and vacuumize for 30 minutes, discharge and pelletize.

Embodiment 3

[0038] 1) Weigh 100 parts by weight of nylon 66 salt, 10 parts by weight of aramid fiber 1414 pulp with a length of 0.5-1.5 mm and a water content of 5%-12%, and 1 part by weight of acetic acid, and mix the above Components are added to the autoclave;

[0039] 2) Weigh 60 parts by weight of deionized water and 0.3 parts by weight of nano-titanium dioxide and dissolve them in deionized water to prepare a solution. Stir the prepared solution under ultrasound for 1-2 hours, and then add it to the high pressure In the reactor;

[0040] 3) Replace the air in the high-pressure reactor with nitrogen for at least three times, and then pass in nitrogen as a reaction protection gas; keep the pressure at 1.8MPa and 240°C for 3 hours, then release the pressure to normal pressure, and raise the temperature at the same time , the temperature does not exceed 280°C, react at normal pressure for 30 minutes, and vacuumize for 30 minutes, discharge and pelletize.

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Abstract

The invention belongs to the technical field of reinforced wear-resistant nylon composite materials, and relates to a reinforced wear-resistant nylon 66 composite material and a preparation method thereof. The composite material includes 100 parts of nylon 66 salt, 1-10 parts of aramid pulp, 0.1-1 part of an end capping agent, 0.05-0.2 pars of a nucleating agent and 30-60 parts of deionized water. The interface adhesion between aramid fiber and a nylon 66 matrix is improved through an in situ polymerization process to improve the mechanical properties and the wear resistance of the composite material. The reinforced wear-resistant nylon 66 composite material prepared in the invention has better mechanical properties and wear resistance, higher thermal deformation temperature and better dimensional stability than the pure nylon 66 matrix, has good interface adhesion, and has higher extrusion reinforcement strength than nylon 66 aramid fiber, and the method is simple, is easy to carry out, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of reinforced wear-resistant nylon composite materials, and relates to a reinforced wear-resistant nylon 66 composite material and a preparation method thereof. technical background [0002] Nylon 66 is a widely used engineering plastic, which is formed by polycondensation of hexamethylenediamine and adipic acid. The amide group on its molecular chain is polar and easy to form hydrogen bonds, so it has excellent mechanical properties, such as high strength and high modulus. Quantity, high hardness, etc.; in addition, it also exhibits excellent creep resistance, wear resistance and sound attenuation. However, due to its special structure, its water absorption rate is high, resulting in poor dimensional stability, which also reduces its wear resistance and heat resistance. Some modifications can be made to nylon 66 to improve its deficiencies and greatly improve its performance. [0003] The modification of nylon 66 c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L77/10C08G69/28C08K3/30C08K3/22
CPCC08G69/28C08K2201/011C08L77/06C08L2201/08C08L2205/02C08L2205/16C08L77/10C08K2003/3045C08K2003/2241
Inventor 杨桂生田文伟
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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