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Interfacial compatibilizer for nylon/glass fiber reinforced composite material and preparation method thereof

A reinforced composite material and glass fiber technology, which is applied in the field of interface compatibilizer and its preparation, can solve the problems of serious wear and tear of processing equipment, increased machine loss costs, low physical and mechanical strength of products, etc., and achieve good processing performance and mechanical properties, Effect of improving dispersion and reducing floating fiber phenomenon

Inactive Publication Date: 2017-02-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the dispersion of glass fiber in the matrix nylon resin will directly affect the reinforcement effect of the composite material, because the addition of glass fiber makes the original smooth surface of nylon very rough, which in turn affects the surface quality of the product. The interface between fiber and nylon is relatively poor, so that the physical and mechanical strength of the product is low
In addition, the wear and tear of glass fiber on processing equipment is also very serious, which increases the loss cost of the machine to a large extent and seriously limits its application.
[0004] Silane coupling agents are usually used to improve the compatibility between glass fiber and nylon, but because silane coupling agents are small molecules without long enough molecular chains to form an adsorption layer on the surface of glass fibers, their corresponding three-dimensional barriers are not enough to overcome nylon. The mutual attraction between glass fibers cannot effectively hinder the aggregation between glass fibers, and the effect of reducing viscosity and dispersing is not obvious enough

Method used

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  • Interfacial compatibilizer for nylon/glass fiber reinforced composite material and preparation method thereof
  • Interfacial compatibilizer for nylon/glass fiber reinforced composite material and preparation method thereof
  • Interfacial compatibilizer for nylon/glass fiber reinforced composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw material ratio:

[0025]

[0026] In the three-necked flask, after adding caprolactam, aminoacetic acid and benzoic acid according to the ratio, the air in the bottle was replaced by nitrogen at a high speed, and the temperature was slowly raised to 220°C, and the ring-opening polymerization was carried out at 220°C for 2 hours, and the temperature was properly lowered to 190°C, and then Add KH550 (3-aminopropyltriethoxysilane) and p-toluenesulfonic acid in sequence, and react at 190° C. for 15 minutes. Finally, use xylene as a solvent to remove unreacted monomers mixed with the product in a Soxhlet extractor. and drying at 100° C. to obtain an interfacial compatibilizer product for nylon / glass fiber reinforced composite materials of the present invention.

Embodiment 2

[0028] Raw material ratio:

[0029]

[0030]

[0031] In the three-neck flask, after adding caprolactam, aminoacetic acid and adipic acid according to the proportion, the air in the bottle was replaced by nitrogen passage at high speed, and the temperature was slowly raised to 200°C, and the ring-opening polymerization was carried out at 200°C for 2 hours, and the temperature was properly lowered to 170°C, followed by Add KH550 and p-toluenesulfonic acid, react at 170°C for 15min. Finally, use xylene as a solvent to remove unreacted monomers mixed with the product in a Soxhlet extractor. and drying at 100° C. to obtain an interfacial compatibilizer product for nylon / glass fiber reinforced composite materials of the present invention.

Embodiment 3

[0033] Raw material ratio:

[0034]

[0035] In the three-necked flask, add caprolactam, aminoacetic acid and adipic acid according to the ratio, and then replace the air in the bottle with nitrogen at a high speed, slowly raise the temperature to 190°C, perform ring-opening polymerization at 190°C for 2 hours, cool down to 170°C appropriately, and then add KH560 (3-(2,3-glycidoxy)propyltrimethoxysilane) and tetrahexylammonium bromide were reacted at 170°C for 15min. Finally, use xylene as a solvent to remove unreacted monomers mixed with the product in a Soxhlet extractor. and drying at 100° C. to obtain an interfacial compatibilizer product for nylon / glass fiber reinforced composite materials of the present invention.

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Abstract

The invention relates to an interface compatibilizer for a nylon / glass fiber reinforced composite material. The interface compatibilizer for the nylon / glass fiber reinforced composite material is prepared by using the following components in parts by weight: 77-89 parts of carboxyl-terminated polycaprolactam low polymer, 10-20 parts of silane coupling agent and 1-3 parts of initiator, wherein the carboxyl-terminated polycaprolactam low polymer is prepared by using the following components in parts by weight: 75-85 parts of caprolactam, 8-15 parts of organic acid and 7-10 parts of aminocaproic acid. By using the interface compatibilizer with certain diffusion chains provided by the invention in the nylon / glass fiber reinforced composite material, not only can enough adsorbing layers be formed on the surface of glass fibers, but also an effective compatible interface can be formed together with nylon, the dispersibility of the glass fibers at a high filling capacity is improved, the phenomenon of floating fibers is reduced and the composite material is enabled to have better processing performance and mechanical performance.

Description

technical field [0001] The invention relates to chemical additives, in particular to an interface compatibilizer for nylon / glass fiber reinforced composite materials and a preparation method thereof. Background technique [0002] Nylon (PA) is a widely used engineering plastic. It has good rigidity, oil resistance and wear resistance, easy processing, and can be recycled at the same time. A series of advantages such as sufficient sources determine that it is used in the automotive industry to replace steel with plastic. , to realize the development prospect of lightweight design of the vehicle body. However, pure nylon has high water absorption, poor acid resistance, low dry and low-temperature impact strength, and easy deformation after water absorption, which affects the dimensional stability of the product and limits its application range to a certain extent. In this regard, in order to meet the high-temperature and wear-resistant requirements of nylon in the automotive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08K5/544C08K5/5435C08G69/16C08G69/10
CPCC08G69/10C08G69/16C08K5/5435C08K5/544C08K2201/014C08L77/02
Inventor 李远唐颂超王丽李文振邓泽星米易晓
Owner EAST CHINA UNIV OF SCI & TECH