改性硅炔树脂及其复合材料的耐热性能

Modification and HeatResistance of Hybrid Composite Containing Silicon and Acetylene Resin

摘要: 通过格氏试剂反应制得了改性硅炔杂化树脂（GMD）。采用DSC、TGA等分析方法研究了GMD的固化反应及耐热性能。结果表明：GMD固化物在氮气气氛下质量损失5%时的温度(Td5)为631 °C，1 000 °C时的质量残留率为59%。所制备的玻璃纤维增强复合材料在常温下的弯曲强度为320 MPa，在240 °C的弯曲强度保留率高达90%，空气条件下经500 °C处理7 min后，质量保留率仍达到99.7%。该复合材料的玻璃化温度大于400 °C，具有优异的耐热性能、力学性能及介电性能。

Abstract: The siliconcontaining poly(arylaeetylene) resin (GMD) was synthesized by condensation reaction. The curing the cured GMD was 631°C in nitrogen. The residual of mass was 59% based on the initial mass at 1 000 °C. The flexural the cured GMD was 631°C in nitrogen. The residual of mass was 59% based on the initial mass at 1 000 °C. The flexural strength at room temperature of the composite was 324 MPa and the retention rate of flexural strength was 90% at 240 °C. After heat treated for 7 min at 500°C in air, the retain ratio of the composite was 99.7%. The composite of which Tg was more than 400 °C possessed excellent high temperatureresistance properties, excellent mechanical and dielectric properties.