Modified silicon-containing aryne resin, and composite material, preparation method and application thereof

A technology of resin composite materials and aryne resins, which is applied in the field of modified silicon-containing aryne resins, composite materials and their preparation and application, can solve the problems of not being able to meet the viscosity requirements of the wet winding molding process and low mechanical properties, and achieve The effects of long pot life, good mechanical properties and simple preparation process

Inactive Publication Date: 2019-06-14
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects that the existing silicon-containing aryne resin cannot meet the viscosity requirements and low mechanical properties of the wet winding molding process, the present invention provides a modified silicon-containing aryne resin, a composite material and its preparation method and application

Method used

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  • Modified silicon-containing aryne resin, and composite material, preparation method and application thereof
  • Modified silicon-containing aryne resin, and composite material, preparation method and application thereof
  • Modified silicon-containing aryne resin, and composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1. Synthesis of each component

[0058] (1) Synthesis of ethynylphenyl-terminated silicon-containing aryne resin (PSA)

[0059] Diethynylbenzene (12.61 g, 0.1 mol) was weighed into a 500 mL four-necked flask equipped with a mechanical stirrer, a condenser, a constant pressure dropping funnel, and a thermometer, and 100 mL of THF was added. Stir and dissolve evenly under the protection of argon, and control the temperature to -10°C with a liquid nitrogen / ethanol bath. Draw 80mL of 2.5M n-butyllithium solution with a syringe, and slowly add it dropwise through a constant pressure dropping funnel. After the dropwise addition, the temperature was raised to 20-30° C. and reacted for 2 hours. Weigh 8.6g of dimethyldichlorosilane and dissolve it in 100mL of THF, and slowly drop it into the reaction flask through a constant pressure dropping funnel. After dropping, the temperature was raised to reflux for 2h. Then cool down to 30°C, measure 10mL of glacial acetic acid and d...

Embodiment 2

[0069] The synthesis of each component is the same as in Example 1.

[0070] Add 5.6g of PSA resin and 2.4g of FEC-PSA resin into a 250mL three-neck flask equipped with mechanical stirring and reflux condenser, add 17mL of solvent THF, stir and dissolve for 0.5h, then add 2g of P-appe, and continue stirring to form a homogeneous co- mixed resin solution; then use a rotary evaporator to remove the solvent in vacuum to obtain a modified silicon-containing aryne resin, which is designated as PFP-2.

Embodiment 3

[0072] The synthesis of each component is the same as in Example 1.

[0073] Add 4.9g of PSA resin and 2.1g of FEC-PSA resin into a 250mL three-neck flask equipped with mechanical stirring and reflux condenser, add 17mL of solvent THF, stir and dissolve for 0.5h, then add 3g of P-appe, and continue stirring to form a homogeneous co- mixed resin solution; then use a rotary evaporator to remove the solvent in vacuum to obtain a modified silicon-containing aryne resin, which is designated as PFP-3.

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Abstract

The invention discloses a modified silicon-containing aryne resin, and a composite material, a preparation method and an application thereof. The modified silicon-containing aryne resin is a blend of49-63 mass% of an ethynyl phenyl-terminated silicon-containing aryne resin, 21-27 mass% of a phenylacetylene fully-terminated silicon-containing aryne resin and 10-30 mass% of propargyloxy-containingbenzoxazine. The modified silicon-containing aryne resin has a viscosity at 30-50 DEG C of below 50 Pa.s, has a long working life, good mechanical properties and a high heat resistance, and is suitable for a wet winding forming process, and the composite material prepared from the modified silicon-containing aryne resin is widely used in fields of aerospace and transportation.

Description

technical field [0001] The invention relates to a modified silicon-containing aryne resin, a composite material, a preparation method and application thereof. Background technique [0002] High heat-resistant materials are widely used in the aerospace field as thermal protection materials and structural-heat-resistant integrated materials. Poly(silylene-arylacetylene), referred to as PSA) is a kind of high heat-resistant organic-inorganic hybrid compound containing -Si-C≡C-Ar-structural unit. The resin has good processability and curing No by-products are produced during the reaction, and it exhibits excellent properties such as high heat resistance, low dielectric constant and high-temperature ceramicization, and can be applied in the fields of high heat resistance, ablation resistance and high-temperature ceramic materials. At present, the processing methods for preparing composite materials using PSA are usually compression molding and resin transfer molding (RTM) techno...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C08L83/16C08K7/06C08J5/24C08G77/60
Inventor袁荞龙黄发荣王呈成陆韡张之翎田杰
OwnerEAST CHINA UNIV OF SCI & TECH