硅烷气相接枝水解交联聚丙烯  

Vapor Phase Grafting of Vinyltrimethoxysilane and Its Crosslinking on Polypropylene

作　　者：胡淼[1] 王正洲[1] 瞿保钧[2] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026 [2]中国科学技术大学高分子材料与工程系,合肥230026

出　　处：《应用化学》2006年第4期349-352,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(50273036);国家重点基础研究专向基金(2001CB409600)资助项目

摘　　要：采用气相接枝方法研究了硅烷交联聚丙烯材料。探讨了在过氧化物作用下乙烯基三甲氧基硅烷(VTMS)气体在聚丙烯粉末表面进行气相接枝反应的机理,及引发剂过氧化二异丙苯(DCP)和VTMS单体浓度对硅烷接枝率和水解交联产物凝胶含量的影响。用富里叶变换红外光谱(FTIR)和富里叶变换红外光声光谱(FTIR-PAS)对反应产物进行了分析。结果表明,单体和引发剂在聚丙烯中的扩散情况对硅烷接枝率存在较大影响。增加引发剂和硅烷单体的用量,硅烷的接枝率上升,其增加趋势在单体浓度为0.026 mol/L和引发剂质量分数大于0.6%后逐渐变缓。Vapor phase grafting of vinyltrimethoxysilane （VTMS） onto polypropylene （PP） powders and its subsequent hydrolysis crosslinking were studied in this work. The vapor grafting mechanism of VTMS onto PP through free radical was studied. The effects of the VTMS monomer and initiator concentrations on the grafting degree of the silane and gel content of the crosslinked samples were investigated. FTIR and VrIR-PAS were used to analyze the grafted materials. The result shows that the diffusion conditions of the monomer and the initiator in the PP have significant influence on the VTMS grafting degree. The grafting degree of VTMS increases with increasing monomer and initiator concentrations, and this trend slows down when the concentra- tions of the monomer and the initiator are over 0. 026 mol/L and 0. 6%, respectively.

关 键 词：聚丙烯 气相接枝 硅烷交联 

分 类 号：O631.5[理学—高分子化学]