摘要
以二苯甲酮为光引发剂 ,以低密度聚乙烯 (LDPE)膜为基膜 ,研究了不同单体的光接枝聚合反应及交联反应 ,并用称重法测定了聚合体系单体的转化率、接枝效率以及膜的交联度。结果表明 ,在所选用的单体中 ,甲基丙烯酸甲酯很难进行光接枝聚合反应 (接枝效率为 0 ) ;丙烯酸的单体转化率最高 (>80 % ) ;丙烯酸、丙烯酸丁酯、甲基丙烯酸和丙烯酸甲酯的接枝效率较高 (可达到 95% )。测定了接枝后LDPE膜的交联程度 ,当丙烯腈、丙烯酸甲酯、丙烯酸及丙烯酰胺作为单体时 ,LDPE膜产生了较为明显的交联 (交联度 >30 % )。观察反应结束后的LDPE复合膜 ,发现以丙烯酸丁酯、丙烯酸甲酯及丙烯酸作单体时较难分离。
A variety of monomers, including AA, AN, AAM, BA, MA, MAA and MMA, were photografted onto substrate composed of two LDPE films, initiated by benzophenone(BP). The conversion percentage(CP), grafting efficiency(GE) and gel content(GEL) of the polymerization systems were determined with gravimetric method. The results show that no grafted polymer was formed when MMA was used as the monomer; CP of LDPE/AA system was remarkably higher than those of others; GE values of AA, BA, MA and MAA were relatively high; to all the polymerization systems examined, cross linking reaction of LDPE took place inevitably, with varying gel content.
出处
《北京化工大学学报（自然科学版）》
EI
CAS
CSCD
2000年第3期37-39,共3页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金!资助项目 (2 98740 0 4 )
