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A tough epoxy resin system compatible with liquid oxygen

A tough epoxy resin and epoxy resin technology, applied in the fields of chemical industry and materials, can solve the problems of liquid oxygen incompatibility, material performance degradation, etc., and achieve the effect of good toughness and excellent liquid oxygen compatibility

Active Publication Date: 2020-11-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Current research shows that carbon fiber has good compatibility with liquid oxygen, but epoxy resin will degrade the material performance at low temperature, and simple epoxy resin is brittle and incompatible with liquid oxygen

Method used

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  • A tough epoxy resin system compatible with liquid oxygen
  • A tough epoxy resin system compatible with liquid oxygen
  • A tough epoxy resin system compatible with liquid oxygen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A flexible epoxy resin system compatible with liquid oxygen prepared by:

[0027] 1) Preparation of modified amine curing agent: at a temperature of 80°C, slowly add vinyl triethoxysilane to the alicyclic amine curing agent, the mixture of alicyclic amine curing agent and vinyl triethoxysilane The molar ratio is 1:1, and the temperature of the reaction system is controlled at 80°C during the dropping process. After the dropping is completed, it is kept at 80°C for 2 hours to obtain a modified amine curing agent;

[0028] 2) Preparation of modified epoxy resin: at a temperature of 120°C, add DOPO to the epoxy resin for stirring (the mass ratio of DOPO to epoxy resin is 1:13), and after DOPO is completely dissolved, raise the temperature to 160°C and keep it warm 5h, obtain modified epoxy resin;

[0029] 3) Preparation of liquid oxygen compatible epoxy resin system: mix 100 parts of modified epoxy resin with 68 parts of modified amine curing agent in parts by mass, gel a...

Embodiment 2

[0032] A tough epoxy resin system compatible with liquid oxygen and a preparation method thereof, the preparation method is as follows:

[0033] 1) Preparation of modified amine curing agent: at a temperature of 80°C, slowly add vinyl triethoxysilane to the alicyclic amine curing agent, the mixture of alicyclic amine curing agent and vinyl triethoxysilane The molar ratio is 1:2, and the temperature of the reaction system is controlled at 80°C during the dropping process. After the dropping is completed, it is kept at 80°C for 2 hours to obtain a modified amine curing agent;

[0034] 2) Preparation of modified epoxy resin: at a temperature of 120°C, add DOPO to the epoxy resin for stirring (the mass ratio of DOPO to epoxy resin is 1:13), and after DOPO is completely dissolved, raise the temperature to 160°C and keep it warm 5h, obtain modified epoxy resin;

[0035] 3) Preparation of liquid oxygen compatible epoxy resin system: mix 100 parts of modified epoxy resin with 102 par...

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Abstract

The invention provides a tough epoxy resin system compatible with liquid oxygen. The epoxy resin system is obtained through curing on modified epoxy resin and a modified amine curing agent, wherein the modified epoxy resin is formed through polymerization of epoxy resin with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and the modified amine curing agent is formed through polymerization ofan alicyclic amine curing agent and vinyl silane. The synthesis methods of the modified amine curing agent and the modified epoxy resin have simple processes and easy control; and the tough epoxy resin system compatible with liquid oxygen has the advantages of no explosion, combustion and obvious flash reactions with liquid oxygen, and is compatible with liquid oxygen, and can be used as a low-temperature storage material for carbon fiber-reinforced composite materials.

Description

technical field [0001] The invention relates to the technical fields of chemical industry and materials, in particular to a tough epoxy resin system compatible with liquid oxygen. Background technique [0002] Epoxy resin has very good properties, such as good temperature resistance, mechanical stability and chemical resistance, etc., while fiber-reinforced composite materials have excellent specific strength, specific modulus and good thermal resistance. Among them, carbon fiber reinforced epoxy resin composites can reduce the weight by 27%-35% compared with metal alloy materials, so they are widely used in the aerospace field. However, when most epoxy resins and their composite materials are in contact with liquid oxygen, they may explode and burn under the action of external energy such as impact, collision, friction, etc., that is, liquid oxygen is incompatible. Moreover, the boiling point of liquid oxygen is -183°C. Compared with normal temperature, the mechanical perf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/50C08G59/14
Inventor 蔡浩鹏傅伟王钧
Owner WUHAN UNIV OF TECH
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