乙烯基硅烷在聚乙烯中的传输行为  

Transport Behavior of Vinyl Silane in Polyethylene

作　　者：龚方红[1] 林明德[2] 汪信[1] 陆路德[1] 杨绪杰[1] 

机构地区：[1]南京理工大学,南京210014 [2]江苏工业学院材料工程系

出　　处：《应用化学》2004年第12期1277-1280,共4页Chinese Journal of Applied Chemistry

基　　金：江苏工业学院青年科技基金资助项目 ( 2 0 0 188)

摘　　要：采用浸泡称重法得到了 3种硅烷 (A171,A172 ,A15 1)在LDPE、LLDPE、HDPE塑料试片中的渗透量随时间变化的关系 ,测得了不同温度下的扩散系数 ;采用有限差分计算方法 ,计算机模拟上述体系的物质传输过程 ,计算得到的 3种硅烷在 3种塑料片中的扩散系数。根据Arrhenius方程求得A171在HDPE、LDPE、LLDPE中的扩散活化能分别为 38 2、2 4 0和 2 2 0kJ。The relationship between the permeating amount and time of three vinyl silanes(vinyl trimethoxy silane:A171, vinyl tri-2-methoxyethoxysilane:A172, vinyl triethoxysilane:A151) in three different polyethylenes(LDPE, LLDPE, HDPE) was obtained by using a soak-weighing method. The diffusion coefficients at different temperatures were calculated according to Fick′s law. Meanwhile, computer simulation of the diffusion behavior in above systems was carried out by using the finite differences method. The diffusion coefficients were also calculated. According to the Arrhenius equation, the activation energies of the diffusion of A171 in HDPE, LDPE, LLDPE were calculated to be 38.2, 24.0 and 22.0 kJ, respectively. This provides a convenient method for the evaluation of the soaking time in the grafting process of polyethylene with silanes.

关 键 词：聚乙烯  乙烯基硅烷  扩散系数  有限差分法 

分 类 号：O631[理学—高分子化学]