Phthalonitrile-based composite material and preparation method and application thereof

A technology of phthalonitrile-based and phthalonitrile resins, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, coatings, etc., can solve the problem of complex secondary processing and secondary molding processes, which are not conducive to Promote the use of other issues to achieve the effect of matching the mechanical properties of ablation resistance and thermal expansion coefficient

Active Publication Date: 2021-08-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the composite materials prepared with these resins as the matrix can only be used as functional parts, especially in the prior art, the composite structural parts and functional parts are usually pressed separately, and there may be secondary processing defects in the subsequent processing and compounding
And the secondary molding process is complicated, which is not conducive to popularization and use

Method used

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  • Phthalonitrile-based composite material and preparation method and application thereof
  • Phthalonitrile-based composite material and preparation method and application thereof
  • Phthalonitrile-based composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Phthalonitrile resin prepreg, which is made of glue by mixing phthalonitrile resin and acetone at a weight ratio of 100:150. The viscosity of the glue is about 800mPa.s, and then the glue is mixed evenly and coated Cover on 120 parts of glass fiber plain weave cloth (brand SW-280), the number of times of brushing is 2 times, and fully air until the weight content of acetone drops below 4%, to obtain the phthalonitrile resin glass fiber prepreg.

[0067] When preparing another prepreg, mix the above-mentioned glue solution evenly and apply it on 120 parts of high-silica fiber plain weave cloth. The number of times of brushing is 2 times, and it is fully aired until the weight content of acetone drops below 4%. Phthalonitrile resin high silica fiber plain weave prepreg.

[0068] Among them, the phthalonitrile resin glass fiber prepreg is the same as the phthalonitrile resin in the phthalonitrile resin high-silica fiber plain cloth prepreg, which consists of phthalonitrile...

Embodiment 2

[0077] Phthalonitrile resin prepreg, which is made of glue by mixing phthalonitrile resin and acetone at a weight ratio of 100:185. The viscosity of the glue is about 900mPa.s, and then the glue is mixed evenly and coated Coating on 12 parts of T700 carbon fiber, the number of times of brushing is 2 times, and fully airing until the weight content of acetone drops below 4%, to obtain a phthalonitrile resin prepreg.

[0078] Phthalonitrile resin premix, which is made of glue by mixing phthalonitrile resin and acetone in a weight ratio of 100:160, the viscosity of the glue is about 800mPa.s, and then 120 parts of chopped high The silicone fiber and the mixed glue solution are poured into a mixer, mixed evenly, spread out and left standing until the acetone volatilizes until the weight content is less than 4%, and the phthalonitrile resin premix is ​​obtained.

[0079] Wherein, the phthalonitrile resin prepreg is the same as the phthalonitrile resin in the phthalonitrile resin pr...

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Abstract

The invention discloses a phthalonitrile-based composite material and a preparation method and application thereof. The phthalonitrile-based composite material comprises an integrally formed structure consisting of a heat-proof layer and a structural layer coated with the heat-proof layer, or comprises an integrally formed sandwich structure formed by stacking heat-proof layers and a structural layer; in the sandwich structure, the heat-proof layers serve as an upper layer and a bottom layer, and the structural layer serves as a middle layer; and the heat-proof layers are selected from a phthalonitrile resin premix and / or a phthalonitrile resin prepreg, and the structural layer is selected from a phthalonitrile resin prepreg. The composite material is obtained through one-time mold pressing curing molding. The process complexity that a structure sample piece and a functional sample piece of the composite material are separately pressed and subjected to secondary forming is overcome, and a structure ablation integrated phthalonitrile composite material component which is resistant to ablation and excellent in mechanical property can be industrially produced; and the composite material can be widely applied to the aerospace technology.

Description

technical field [0001] The invention belongs to the technical field of composite material molding, and in particular relates to a phthalonitrile-based composite material and its preparation method and application. Background technique [0002] When a space vehicle (rocket, missile, spacecraft) enters the atmosphere at supersonic speed and returns to the ground, the aerodynamic and thermal environment is extremely harsh. At this time, there is a great requirement for the heat insulation and ablation resistance of the aircraft. Most of the matrix composite materials currently used for heat insulation and ablation resistance are phenolic resins, silicone resins, inorganic fillers, etc. However, most of the composite materials prepared with these resins as the matrix can only be used as functional parts. Especially in the prior art, the structural parts and functional parts of composite materials are usually pressed separately, and there may be secondary processing defects in t...

Claims

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Application Information

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IPC IPC(8): B29C70/42B29C70/54B32B17/04B32B27/04B32B27/28B32B27/26B32B27/20B32B27/12B32B27/06B32B9/00B32B9/04B32B7/08B32B33/00
CPCB29C70/42B29C70/54B32B5/02B32B5/26B32B27/20B32B27/28B32B27/12B32B27/26B32B27/08B32B7/08B32B33/00B32B2255/02B32B2255/26B32B2262/101B32B2250/40B32B2250/20B32B2262/106B32B2260/046B32B2260/021B32B2307/3065B32B2307/546Y02T50/40
Inventor 周恒郭颖刘翔赵彤李东辉
Owner INST OF CHEM CHINESE ACAD OF SCI
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