摘要
采用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)的乙醇溶液在^(60)Co-γ射线作用下进行辐射聚合,探讨了辐射剂量对聚合反应程度和产物分子量的影响,进一步研究了聚合产物的陶瓷化性能和裂解产物结构。结果表明,当辐射剂量为40 kGy时,KH570的聚合程度最高,制得的含硅聚合物分子量达到38.7×10^(4),多分散系数为8.24。含硅聚合物具有良好的水解活性,其固化树脂在氮气氛围下经1000℃裂解,残余质量分数为38.8%。裂解产物为具有明显光泽的纯黑色Si—O—C无定型陶瓷,其硅、氧和碳元素的含量分别为40.05%、43.65%和16.30%。
Polymers containing active silane groups were synthesized by^(60)Co-γrays radiation polymerization from the solution ofγ-methacryloxypropyltrimethoxysilane(KH570)/ethanol.The effect of radiation dosage on the polymerization and the molecular weight of the product was investigated,and the ceramic properties and cleavage structure of the product were further studied.The results indicate that KH570 has the highest polymerization degree at the radiation of 40 kGy with the molecular weight of 38.7×10^(4),the polydispersity index is 8.24.The silicon-containing polymer exhibits good hydrolytic activity.When its cured resin is pyrolyzed at 1000℃under a nitrogen atmosphere,the residual mass fraction is 38.8%.The pyrolysis product is a glossy,pure black amorphous ceramic containing Si—O—C bonds.X-ray photoelectron spectroscopy analysis reveals that the mass fractions of Si,O and C are 40.05%,43.65%,and 16.30%,respectively.
作者
刘思阳
陈屿恒
王静霞
倪茂君
杜浩田
先丽
张婧
彭朝荣
LIU Siyang;CHEN Yuheng;WANG Jingxia;NI Maojun;DU Haotian;XIAN Li;ZHANG Jing;PENG Chaorong(Sichuan Institute of Atomic Energy,Chengdu 610101,China)
出处
《有机硅材料》
CAS
2024年第5期13-17,共5页
Silicone Material
基金
基于辐射增容聚氨酯/聚硅氧烷合金制备新能源汽车阻燃材料(2022JDRC0024)
四川省省级科研院所基本科研业务(2024JDKY0003)。
关键词
辐射聚合
水解缩聚
陶瓷转化
硅烷
radiation polymerization
hydrolytic polycondensation
ceramic transformation
silane
