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Method for improving mechanical property of silicon-containing arylacetylene resin based composite material

A technology of composite materials and silicon aryne, which is applied in the field of composite materials, can solve the problems of poor mechanical strength, poor processing technology, high curing temperature, etc., and achieve the improvement of flexural modulus, mechanical properties and interlaminar shear strength. Effect

Inactive Publication Date: 2015-10-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are also some shortcomings, such as poor processing technology, high curing temperature (above 200 ° C), poor mechanical strength (brittleness)

Method used

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  • Method for improving mechanical property of silicon-containing arylacetylene resin based composite material
  • Method for improving mechanical property of silicon-containing arylacetylene resin based composite material
  • Method for improving mechanical property of silicon-containing arylacetylene resin based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Phenol (0.2mol), paraformaldehyde 12g (0.4mol) and p-aminophenyl propargyl ether 29.4g (0.2mol) were added stoichiometrically into a 250mL three-necked round-bottom flask equipped with a mechanical stirring device, a thermometer and a condenser. ). Heat to 90°C-110°C under stirring, and react for 30 minutes. After the reaction, the product was dissolved in toluene, ethyl acetate or diethyl ether, washed three times with 1mol / L sodium hydroxide solution, then washed with deionized water until neutral, the organic layer was separated, dried by adding anhydrous sodium sulfate, The solvent was removed by rotary evaporation to obtain the monopropargyl ether type benzoxazine P-appe, which was a yellow-brown viscous liquid with a yield of 83%.

Embodiment 2

[0048] With reference to the process for preparing P-appe in Example 1, p-cyanophenol replaced phenol as a monohydric phenolic compound and reacted with formaldehyde and p-aminophenyl propargyl ether to prepare monopropargyl ether type benzoxazine CP -appe is a yellow-brown viscous liquid with a yield of 81%.

Embodiment 3

[0050] With reference to the process for preparing P-appe in Example 1, p-methoxyphenol replaced phenol as a monohydric phenolic compound and reacted with formaldehyde and p-aminophenyl propargyl ether to prepare monopropargyl ether type benzoxazine MP-appe is yellow-brown viscous liquid with a yield of 81%.

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Abstract

The invention relates to a method for improving the mechanical property of a silicon-containing arylacetylene resin based composite material. The method specifically comprises the following steps of uniformly mixing benzoxazine containing propargyl ether and silicon-containing arylacetylene resin (PSA) in a solvent, and obtaining prepreg compounds of carbon fibers and modified silicon-containing arylacetylene resin PSA; after overlaying the prepreg compounds of the carbon fibers and the modified silicon-containing arylacetylene resin, obtaining a carbon fiber reinforced modified silicon-containing arylacetylene resin composite material through hot press molding. The propargyl ether type benzoxazine modified silicon-containing arylacetylene resin prepared by the method is wide in process window, can be cured and molded at the temperature of 120 to 260 DEG C, and cannot release small molecular substances during curing, the glass-transition temperature of the cured modified silicon-containing arylacetylene resin is still higher than 500 DEG C, the heat stability is not influenced greatly, the mechanical property of the PSA resin after modifying is improved. The interlaminar shear strength of the carbon fiber reinforced modified PSA based composite material is obviously improved, and is expected to be used as a high-temperature-resistant lightweight-structure material.

Description

【Technical field】 [0001] The invention relates to the technical field of composite materials, in particular to a method for improving the mechanical properties of silicon-containing aryne resin-based composite materials. 【Background technique】 [0002] Silicon-containing aryne resin (PSA) is a new type of aryne-based thermosetting resin, which has a highly cross-linked structure after curing. In addition to the characteristics of aryne-based resins, it also has excellent electrical properties and high-temperature ceramics Chemical properties (that is, stable ceramic structures can be formed in such polymers at high temperatures, such as SiC or / and SiO 2 Wait). [0003] Arynes and silanes can be dehydrogenated by cuprous chloride and magnesium oxide to prepare silicon-containing arynes. Itoh et al. synthesized a silicon-hydrogen-containing aryne resin-MSP (Macromolecules1994, 27: 7917-7917.) using magnesium oxide catalysis and Grignard method, which has excellent thermal pr...

Claims

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Application Information

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IPC IPC(8): C08L83/16C08L79/04C08G77/60C08G73/06C08K7/06C08J5/24B29C70/40
Inventor 黄发荣袁荞龙杨丽章婷婷张涛刘志华杜磊
Owner EAST CHINA UNIV OF SCI & TECH
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