CAJ | 학술논문

利用γ射线在空气中辐照聚碳硅烷先驱丝,研究了PCS 先驱丝在空气中的辐照不熔化特性。结果表明,PCS 在空气中辐照时产生了 Si-O-Si、Si-O-C和 Si-CH2-Si 桥联结构；随吸收剂量的增加,辐照氧化增重率逐渐增大,辐照氧耗G 值逐渐降低；先驱丝凝胶点剂量为1.5 MGy,凝胶化剂量为4.0MGy；辐照可大幅提高 PCS 的热解产率,吸收剂量达凝胶化剂量时,PCS热解产率高达86.2%。
이용γ사선재공기중복조취탄규완선구사,연구료PCS 선구사재공기중적복조불용화특성。결과표명,PCS 재공기중복조시산생료 Si-O-Si、Si-O-C화 Si-CH2-Si 교련결구；수흡수제량적증가,복조양화증중솔축점증대,복조양모G 치축점강저；선구사응효점제량위1.5 MGy,응효화제량위4.0MGy；복조가대폭제고 PCS 적열해산솔,흡수제량체응효화제량시,PCS열해산솔고체86.2%。
Polycarbosilane precursor fibers were irradiated byγ-ray in open air atmosphere.The irradiation cu-ring properties were studied.Results showed that bridge structures of Si-O-Si,Si-O-C and Si-CH2-Si are formed in the fibers when irradiated in air atmosphere.Weight gain of the fibers was increased,and oxygen comsumption was decreased with absorbed dose increasing.The gel point dose was about 1.5MGy and the gel-ling dose was about 4.0MGy,respectively.The pyrolysis yields of the PCS fibers could be improved by irradia-tion.The pyrolysis yields reach up to 86.2% when the absorbed dose reached the gelling dose.