(1. 中南大學(xué) 粉末冶金國家重點實驗室， 長沙 410083;
2. 國防科技大學(xué)一院, 長沙 410073)
摘 要: 將聚二甲基硅烷(PDMS)與聚氯乙烯 (PVC) 共裂解合成碳化硅-碳纖維先驅(qū)體， 并經(jīng)熔融紡絲及不熔化處理， 最后經(jīng)過燒成制得SiC-C陶瓷纖維， 電阻率小于100 Ω·cm， 而通過聚碳硅烷制得的SiC纖維的電阻率為106 Ω·cm。 結(jié)果表明： 采用適當(dāng)?shù)墓に嚕?能夠從聚二甲基硅烷與聚氯乙烯共裂解出發(fā)制備低電阻率并兼具良好力學(xué)性能的SiC纖維。
關(guān)鍵字: 碳化硅纖維; 聚碳硅烷; 電阻率
（ 1. State Key Laboratory of Powder Metallurgy,
Central South of University,Changsha 410083, China;
2. Key Lab of CFC, National University of Defence Technology, Changsha 410073, China）
Abstract: The precursor polymer was prepared by means of thermal rearrangement reaction of polyvinylchloride and polydimethylsilane. Through melt spinning, infusibilization and heat treatment at high temperature, fiber with low resistivity was obtained; it shows lower resistivity than the SiC fiber derived from polycarbosilane. It is shown that fibers with low resistivity and mechanical properties could be obtained by polymer co-pyrolyzed.
Key words: SiC fiber; polycarbosilane; resistivity; preparation
