摘要
分别以乙烯基三乙氧基硅烷（A151）、γ-甲基丙烯酰氧丙基三甲氧基硅烷（A174）为起始单体，采用水解缩聚的方法合成了两种含有不饱和侧基的聚硅氧烷，分别为PA151和PA174．用红外光谱（FTIR）、核磁共振（NMR）分析并确定了两种聚合物的结构，用凝胶渗透色谱（GPC）对聚合物的分子及分子量分布进行了表征，同时对聚合物的紫外光固化行为进行了研究．结果表明：两种聚合物均可紫外光固化，而且PA174的固化速率和最终双键转化率均比PA151高．利用差示扫描量热仪（DSC）、热重分析仪（TGA）对固化后产物的热性能进行了分析．DSC研究发现PA151固化产物在-30℃～100℃之间没有明显的玻璃化转变，而PA174的固化产物则在13．9℃左右有明显的玻璃化转变；TGA结果显示PA151和PA174固化后产物的分解温度分别为503．1℃和429．1℃．
Two kinds of polysiloxanes with unsaturated groups, PA 151 and PAl74 were prepared via self-condensation of vinyltriethoxysilane and γ-methylallylacyoxylpropyltrimethoxysilane, respectively. The structure of the polymers was determined by FTIR and NMR, their molecular weight and distribution were characterized by GPC. It was found that the polymers could be cured under ultraviolet light, and the curing speed and unsaturation convention of PAl74 were higher than those of PAl51. The thermal properties of the two cured polysiloxanes were explored with DSC and TGA. The DSC results showed that the glass transition temperature of cured PAl51 could not be detected, and the glass transition temperature of cured PAl74 was about 13. 9 ℃. The TGA results indicated that thermal degradation temperature were 503.1℃ and 429.1℃ for PAl51 and PAl74, respectively.
出处
《西安工业大学学报》
CAS
2007年第3期247-251,283,共6页
Journal of Xi’an Technological University
基金
陕西省教育厅专项科教计划(05JK218)
关键词
聚硅氧烷
紫外光固化
热性能
polysiloxane
ultraviolet curing
thermal properties
