通过共混将Si 引入到芳基乙炔树脂中, 运用傅里叶红外光谱(Fourier transform infrared spectroscope,FT-IR)研究了硅烷改性芳基乙炔(arylacetylene, AA)固化物的结构, 并采用热失重分析(thermogravimetry analysis,TGA)法分析了硅烷改性芳基乙炔固化物的热稳定性以及水煮对固化物热稳定性的影响. 结果显示: 硅烷改性芳基乙炔固化物在N2 中的耐热性随着硅烷量的增加而降低; 硅烷改性芳基乙炔固化物的耐热氧性能随着硅烷量的增加而提高, 其中当芳基乙炔与乙烯基三甲氧基硅烷(vinyl trimethoxy siloxane, VTMS)的质量配比为10∶5 时,在空气氛围下800 ℃ 的残炭率为23.6%; 水煮能使固化物的耐热性能进一步提高.
In order to introduce Si into poly arylacetylene (PAA), siloxane was used to blend with arylacetylene.The structure and thermal stability of the cured arylacetylene/siloxane were studied. Effect of boiling on the thermal stability of the cured arylacetylene/siloxane was also investigated. The results show that thermal stability of the cured arylacetylene/siloxane in N2 is weaker than PAA, which is affected by the amount of siloxane. Thermooxidative stability of the cured arylacetylene/siloxane is improved with an increase of siloxane. For the cured resins (mAA ∶ mVTMS=10 ∶ 5, where VTMS is vinyl trimethoxy siloxane), the residue yield at 800 ℃ in air is 23.6%. After boiling, thermal stability of the cured arylacetylene/siloxane is improved further.
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