聚丙烯蜡/聚乙二醇接枝共聚物在PP共混体系中的迁移扩散  

Diffusion of PP-g-PEG in PP Blend

作　　者：陈汉佳[1] 祝亚非[2] 张艺[1] 许家瑞[1] 

机构地区：[1]中山大学化学与化学工程学院聚合物复合材料与功能材料教育部重点实验室 [2]中山大学测试中心,广东广州510275

出　　处：《塑料工业》2007年第7期42-46,共5页China Plastics Industry

基　　金：国家自然科学基金(50273048);教育部博士点专项科研基金(20010558002);中山大学校长基金的项目

摘　　要：利用ATR-FTIR光谱对聚合物表面的组成进行定量分析,通过扩散动力学方程、拟合曲线和扩散系数考察了聚丙烯蜡/聚乙二醇接枝共聚物在聚丙烯共混体系中的迁移扩散。实验发现:温度和分子结构对接枝共聚物在聚丙烯改性体系中的扩散存在影响。不同结构的接枝共聚物对温度的敏感不同,较高温度区间的温度变化对体系迁移扩散的影响更明显。接枝率越高、亲水性侧链的长度越长,亲基体主链摩尔质量越大,接枝共聚物在聚丙烯共混体系中的迁移扩散性能越差,扩散系数越小。The diffusion of polypropylene-g-poly（ethylene glycol） （PP-g-PEG） segments in PP blends was investigated by means of ATR-FTIR and SEM. It was found the annealing temperature and structure of PP-g-PEG had effect on the diffusion and selective aggregation in PP. The sensitivity of PP-g-PEG with different structure to temperature was different, the effect of the changes of higher temperature on the diffusion was more obvious. When the graft ratio was high, the hydrophilic side chain was long and the molecular mass of the main chain of the hy- drophilic matrix was great, the diffusion of PP-g-PEG in PP blends would be poor, and the diffusion coefficient would also be small.

关 键 词：聚丙烯 聚丙烯-聚乙二醇接枝共聚物 扩散 ATR-FTIR 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]