PREPARETION AND PROPERTIES OF A NEW SILICON-POLYTRIAZOLE RESIN AND ITS COMPOSITE

Abstract

Abstract: Low molecular weight silicon-containing arylacetylene (LPSA) was designed and synthesized from diethynylbenzene and dimethyldichlorosilane. A new silicon-polytriazole (Si-PTA) resin was synthesized from 4,4'-diazidomethyl biphenyl (DAMBP) and LPSA via 1,3-dipolar cycloaddition. The results show that the resin could be cured at 80℃. The dynamic thermomechanical analysis (DMA) results show that the glass transition temperature (Tg) of the cured Si-PTA resin is 310℃. Thermogravimetric analysis (TGA) results show that the thermal decomposition temperature (T_d5, temperature at 5% weight loss) under N₂ could reach 340℃. Unidirectional T700 carbon fiber reinforced Si-PTA composite (Si-PTA/T700) was prepared through compression molding. The structures and properties of the composite were characterized by mechanical property tests and DMA. The results show that the Si-PTA composite exhibited good mechanical and thermal properties.

Key words: 1,3-dipolar cycloaddition, silicon-polytriazole resin, thermal properties, composite

CLC Number:

TB332

GUO Bing, DU Lei, WAN Li-qiang, HUANG Fa-rong. PREPARETION AND PROPERTIES OF A NEW SILICON-POLYTRIAZOLE RESIN AND ITS COMPOSITE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(7): 27-32.

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