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以异丙醇锆(ZIP)为交联剂、聚碳硅烷(PCS)为先驱体,在Ar气氛的保护下通过干法纺丝、热化学交联工艺使PCS从热塑性转变热固性结构.研究了该工艺对PCS纤维质量变化、Si-H反应程度、溶解性及氧含量等性能的影响.实验结果表明:在不熔化过程中,PCS结构中的Si-H键与ZIP反应,在PCS分子间形成Si-O-Zr交联结构,随着交联温度和保温时间的升高,Si-H反应程度和纤维失重率相应提高;在测试范围内最大Si-H反应程度为73.06%,失重率2.678%,氧含量低于2.0%.

参考文献

[1] YAJIMA S;OKAMURA K;HAYASHI J.Structure analysis in silicon carbide fiber of high tensile strength[J].Chemistry Letters,1975(04):1209-1212.
[2] YAJIMA S;HAYASHI J;OMORI M et al.Development of SiC fiber with high tensile strength[J].Nature,1976,261:683-685.
[3] CHOONG N;KWET Y.Silicon Carbonitride from Polymeric Precursors:Thermal Cross-Linking and Pyrolysis of Oligosilazane Model Compounds[J].Chemistry of Materials,1992(04):141-146.
[4] HASEGAWA Y .New curing method for polycarbosilane with unsaturated hydrocarbons and application to thermally stable SiC fiber[J].Composites Science and Technology,1994,51:161-166.
[5] OKAMURA K;SATO M.High-temperature strength improvement of Si-C-O fiber by the reduction of oxygen content[A].Tokyo:SAMPE,1989:929-934.
[6] 程祥珍,肖加余,谢征芳,宋永才.聚碳硅烷纤维的不熔化与SiC纤维制备研究[J].材料工程,2004(01):29-32,37.
[7] TAKEDA M;IMAI Y;ISHIKAWA T et al.Properties of the low oxygen content SiC fiber on high temperature heat treatment[J].Ceramic Engineering and Science Proceedings,1991,12(7-8):1007-1018.
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