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High strength and high toughness epoxy resin composition applicable for hot melt method preparation of carbon fiber reinforced composite prepreg

A reinforced composite material and epoxy resin technology, which is applied in the field of high-strength and high-toughness epoxy resin compositions, can solve the problems of compressive strength, low interlaminar shear strength, low fatigue resistance and impact strength, and high crosslinking density. Good high strength, outstanding impact resistance, high mechanical strength effect

Active Publication Date: 2014-10-29
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high crosslinking density of epoxy resin after curing, its cured product has disadvantages such as poor toughness, fatigue resistance and low impact strength, which lead to low post-impact compressive strength and interlaminar shear strength of fiber reinforced composite materials, so It is very necessary to toughen and modify epoxy resin to improve the performance of fiber composites

Method used

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  • High strength and high toughness epoxy resin composition applicable for hot melt method preparation of carbon fiber reinforced composite prepreg
  • High strength and high toughness epoxy resin composition applicable for hot melt method preparation of carbon fiber reinforced composite prepreg
  • High strength and high toughness epoxy resin composition applicable for hot melt method preparation of carbon fiber reinforced composite prepreg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 34.4g of bisphenol A polyether alcohol with the following structural formula, 92.5g of epichlorohydrin and 13g of dimethyl sulfoxide in a 250ml three-necked flask equipped with mechanical stirring, reflux condenser, thermometer and nitrogen gas guide tube. In a nitrogen atmosphere, heat to 60°C to completely dissolve the bisphenol A polyether alcohol in epichlorohydrin, then add 2g of solid sodium hydroxide to start the reaction, then add 2g of solid sodium hydroxide every 0.5 hours for a total of 4 times Add 4g of sodium hydroxide after reacting for 3.5 hours, and then finish the reaction after reacting for 3 hours (reacting in total for 8 hours). After the reaction is over, add deionized water to the reaction system for washing, and wash the water phase to neutrality; then separate the organic phase and distill the volatiles in the organic phase under reduced pressure at 100°C and 3mmHg to obtain bisphenol with the following structure A polyether epoxy resin 41g, ...

Embodiment 2

[0044] Add 46g of bisphenol A polyether alcohol with the following structural formula, 111g of epichlorohydrin and 16g of dimethyl sulfoxide into a 250ml three-necked flask equipped with a mechanical stirrer, a reflux condenser, a thermometer, and a nitrogen airway tube. , heated to 70°C to completely dissolve the bisphenol A polyether alcohol in epichlorohydrin, then added 3g of sodium hydroxide solid to start the reaction, then added 3g of sodium hydroxide solid every 0.5 hours, adding 4 times in total, and reacted After 2.5 hours, 4 g of sodium hydroxide was added, and the reaction was completed after 3 hours of reaction (total reaction of 7 hours). After the reaction is over, add deionized water to the reaction system for washing, and wash the water phase to neutrality; then separate the organic phase and distill the volatiles in the organic phase under reduced pressure at 100°C and 3mmHg to obtain bisphenol with the following structure A polyether epoxy resin 50g, product...

Embodiment 3

[0047] Add 262g of bisphenol A polyether alcohol with the following structural formula, 740g of epichlorohydrin and 100g of dimethyl sulfoxide into a 2000ml three-necked flask equipped with a mechanical stirrer, a reflux condenser, a thermometer and a nitrogen gas guide tube, in a nitrogen atmosphere , heated to 50°C to dissolve the bisphenol A polyether alcohol in epichlorohydrin completely, then added 16g of sodium hydroxide solid to start the reaction, then added 16g of sodium hydroxide solid every 1 hour, adding 4 times in total, and reacting After 2 hours, 32 g of sodium hydroxide was added, and the reaction was completed after 2 hours of reaction (total reaction of 7 hours). After the reaction is over, add deionized water to the reaction system for washing, and wash the water phase to neutrality; then separate the organic phase and distill the volatiles in the organic phase under reduced pressure at 100°C and 3mmHg to obtain bisphenol with the following structure A polye...

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Abstract

The invention relates to a high strength and high toughness epoxy resin composition applicable for hot melt method preparation of a carbon fiber reinforced composite prepreg. The high strength and high toughness epoxy resin composition comprises epoxy resin with multiple degrees of functionality and high epoxy value, bisphenol A polyether epoxy resin with low viscosity, high performance thermoplastic resin and a solid curing agent. The high strength and high toughness epoxy resin composition provided by the invention has the advanategs of flexible formula, simple preparation process and adjustable viscosity, is especially suitable for hot melt preparation of prepreg; and the cured material has the characteristics of high strength and high toughness, and can used for preparation of composite materials with high mechanical properties.

Description

technical field [0001] The invention relates to a high-strength and high-toughness epoxy resin composition suitable for preparing a carbon fiber reinforced composite material prepreg by a hot-melt method and a preparation method thereof. Background technique [0002] In recent years, reinforced composite materials made of carbon fibers have been widely used in structural materials of aircraft and automobiles, sports equipment such as tennis rackets and golf clubs, and general industrial applications due to their high specific strength and high specific modulus. More than 70% of the above-mentioned carbon fiber-reinforced composite materials are formed by laying and curing prepregs. The prepregs are impregnated with uncured thermosetting resins such as epoxy resins, phenolic resins, and maleimide resins in the reinforcing fibers. For the sheet-like intermediate made of matrix resin, epoxy resin is usually used as the matrix resin used in the prepreg in consideration of cost, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L63/02C08L81/06C08L79/08C08G59/06
Inventor 何佩佩杨欣赵晓娟张茵黄伟
Owner INST OF CHEM CHINESE ACAD OF SCI
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