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A kind of modified phenolic resin suitable for RTM molding and its preparation method and application

A technology of phenolic resin and phthalonitrile-based phenolic resin, which is applied in the field of high-performance phenolic resin and its preparation, can solve the problems such as the further improvement of the thermo-oxidative stability of the resin and the application of great pressure, and achieve excellent molding and curing. Process performance, excellent high temperature resistance, and the effect of good application prospects

Active Publication Date: 2016-08-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this resin is condensation curing, releasing small molecules, making dense composite materials must apply a lot of pressure, and the thermo-oxidative stability of the resin needs to be further improved

Method used

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  • A kind of modified phenolic resin suitable for RTM molding and its preparation method and application
  • A kind of modified phenolic resin suitable for RTM molding and its preparation method and application
  • A kind of modified phenolic resin suitable for RTM molding and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Under nitrogen protection, take 15g of 3-APA monomer and place it in a three-neck flask equipped with a condenser, a thermometer and agitator, preheat to 90°C, and slowly add 60g of PN30 resin (characterized by GPC, number average molecular weight) under mechanical stirring. 390 g / mol) powder. Keep the temperature at 90° C., and react for 1 hour under the protection of nitrogen. After the reaction is complete, pour out the solution while it is hot, mark it as PN30-APA20, and keep it sealed.

Embodiment 2

[0063] Under nitrogen protection, take 20g of 3-APA monomer and place it in a three-necked flask equipped with a condenser, a thermometer and agitator, preheat it to 100°C, and slowly add 46.67g of PN50 resin under mechanical stirring (GPC characterization, number average Powder with a molecular weight of 985 g / mol). Keep the temperature at 100° C., and react for 2 hours under the protection of nitrogen. After the reaction is complete, pour out the solution while it is hot, mark it as PN50-APA30, and keep it sealed.

Embodiment 3

[0065] Under nitrogen protection, take 20g of 3-APA monomer and place it in a three-necked flask equipped with a condenser, a thermometer and agitator, preheat it to 110°C, and slowly add 30g of PN80 resin (characterized by GPC, number average molecular weight) under mechanical stirring. 1150g / mol) powder. Keep the temperature at 120° C., and react for 2 hours under the protection of nitrogen. After the reaction is complete, pour out the solution while it is hot, mark it as PN80-APA40, and keep it sealed.

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Abstract

The invention discloses a novel modified phthalonitrile-based phenolic resin (PN‑APA) suitable for RTM molding and a preparation method thereof. PN‑APA resins are prepared by a thermal blending process between phthalonitrile-based phenolic resin (PN) and m-aminophenylacetylene monomer (3‑APA). The resin has excellent processing performance and curing performance. After post-curing at 250°C for 4 hours, the resin cured product can obtain excellent heat resistance and carbon residual performance. The 5% weight loss temperature of the cured product (T d 5 )≥420°C, carbon residue rate at 900°C (R 900℃ ) ≥ 75%.

Description

technical field [0001] The invention relates to a high-performance phenolic resin and its preparation method and application, in particular to a high-performance phenolic resin suitable for RTM molding process, high temperature resistance and high carbon residue, and its preparation method and application, specifically to a meta-amino Phenylacetylene-modified phthalonitrile-based phenolic resin and its preparation method and application. The application fields involved in the resin may include high-temperature resistant composite material matrix, high-performance heat-resistant composite material matrix resin, refractory materials, coated sand and other fields. Background technique [0002] Phenolic resin (PF) is the first synthetic resin to be industrialized in the world, and has a history of nearly a hundred years so far. Because the synthetic raw materials of the resin are easy to obtain, the price is low, the production process and equipment are simple, and it has a ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/30C08L61/14
Inventor 罗振华王晓鹏张勃兴李昊赵彤
Owner INST OF CHEM CHINESE ACAD OF SCI