超支化聚硅氧基硅烷的合成及紫外光固化动力学  

Hyperbranched Poly(Siloxysilane) and Its UV Curing Kinetics

作　　者：王欣[1] 范晓东[1] 王生杰[1] 孔杰[1] 张国彬[1] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710072

出　　处：《高分子材料科学与工程》2008年第7期44-47,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20604019);西北工业大学科技创新基金资助项目(M450211)

摘　　要：通过含硅氢键的超支化聚合物和乙烯基三烯丙基硅烷在铂炭催化剂作用下反应制备了可紫外光固化的超支化聚硅氧基硅烷。利用FT-IR,1H-NMR,13C-NMR,29Si-NMR和SEC/MALLS表征确定了聚合物的分子结构。通过UV-DSC研究了在不同温度、光强和氛围中聚合物的紫外光固化行为,给出了在这些条件下热流和转化率对时间的关系曲线。借助数学软件Matlab7.1将实验数据和动力学方程进行拟合,求得了动力学参数。UV-curable hyperbranched poly （siloxysilane） was synthesized via organosilicon polymer bearing silicon hydride end groups and vinyltriallylsilane at the presence of Pt/C catalyst. FT-IR, ^1H-NMR, ^13C-NMR, ^29Si-NMR arid SEC/MALLS were employed to identify the structure of the polymer. UV curing experiments were conducted at different temperature, light intensity and atmosphere through UV-DSC. The relations of heating flow and conversion versus time at different temperature, light intensity and atmosphere were studied. The results reveal that the acceleration of light intensity to curing reaction is selective to temperature, and the termination of polymerization by oxygen is not remarkable at room temperature or below. The kinetic parameters were obtained by curvefitting of the experimental data with experiential formula （which is operated in software Matlab7.1）. Compared with the experimental curves, the theoretic model showed well accordance. Curing active energy Ea and frequency gene A were obtained by plot of lnk versus -1/RT.

关 键 词：超支化聚合物 紫外光固化 动力学 

分 类 号：TQ324.21[化学工程—合成树脂塑料工业]