CAJ | 학술논문

利用γ射线在空气中辐照处理聚碳硅烷（PCS ）先驱丝，采用凝胶含量、红外光谱、核磁共振、凝胶渗透色谱及理论计算等手段研究了 PCS 先驱丝在空气中的辐照增重特性。结果表明：吸收剂量为4 M Gy时，PCS先驱丝的辐照增重为25.4％，Si- H键的反应程度为86.9％；Si-H键的反应程度与辐照增重呈很好的线性关系，R2＝0.9972；在γ辐照作用下，空气中的氧通过与PCS反应形成了Si-O H、Si-O-Si、Si-O-C和C O结构而造成PCS先驱丝显著增重。理论计算表明，Si-C H3上的C- H键与空气中的氧发生反应生成C O是增重的主要来源。
이용γ사선재공기중복조처리취탄규완（PCS ）선구사，채용응효함량、홍외광보、핵자공진、응효삼투색보급이론계산등수단연구료 PCS 선구사재공기중적복조증중특성。결과표명：흡수제량위4 M Gy시，PCS선구사적복조증중위25.4％，Si- H건적반응정도위86.9％；Si-H건적반응정도여복조증중정흔호적선성관계，R2＝0.9972；재γ복조작용하，공기중적양통과여PCS반응형성료Si-O H、Si-O-Si、Si-O-C화C O결구이조성PCS선구사현저증중。이론계산표명，Si-C H3상적C- H건여공기중적양발생반응생성C O시증중적주요래원。
Polycarbosilane (PCS) precursor fibers were irradiated by γ-ray in air atmos-phere . The weight gain characteristic of the PCS precursor fiber was studied by gel content ,IR ,NMR ,GPC and theoretical calculation .The results show that the weight gain is about 25.4% and the bond of Si-H reaction degree is 86.9% at the absorbed dose of 4 MGy .The Si-H reaction degree and weight gain show a good linear relation-ship ,R2 =0.9972 .The structures of Si-OH ,Si-O-Si ,Si-O-C and CO are formed by means of reaction between oxygen and PCS ,and this cause the PCS precursor fibers to gain weigh .The theoretical calculation shows that the CO formed from the reaction of C-H bond in the Si-CH3 with oxygen is the main source of weight gain .