有机锡参与合成P(BA-EHA)/PVC及共混改性PVC的结构与性能  

Synthesis of P(BA-EHA)/PVC in the presence of organotin and the structure and property of blending modified PVC

作　　者：潘明旺[1] 邢胜男[1] 袁金凤[1] 张晓蕾[1] 张留成[1] 

机构地区：[1]河北工业大学高分子科学与工程研究所,天津300130

出　　处：《聚氯乙烯》2007年第8期5-8,共4页Polyvinyl Chloride

基　　金：河北省自然科学基金项目(B2006000014);河北省教育厅项目(2004420);高分子化学与物理河北省重点学科资助

摘　　要：通过种子乳液聚合方法,采用丙烯酸丁酯(BA)、丙烯酸2-乙基己酯(EHA)为核层单体,与少量有机锡单体共聚制备了含有机锡的P(BA-EHA)胶乳,与氯乙烯(VC)乳液接枝共聚合成了P(BA-EHA)/PVC复合改性剂。通过透射电子显微镜(TEM)、动态力学分析仪(DMA)、扫描电子显微镜(SEM)等测试手段,考察了复合乳胶粒子和共混材料的形态结构、复合改性剂中有机锡含量对其共混改性PVC材料的力学性能及复合粒子热稳定性的影响。DMA和TEM分析结果表明:复合粒子的加入显著改善了橡胶相与PVC之间的相容性,P(BA-EHA)在PVC基体中具有很好的分散性和均匀度,SEM照片显示共混材料缺口断面表现为优异的基体屈服型断裂韧性。P（BA- EHA）latex containing organotin was synthesized by seeding emulsion polymerization,in which butyl acrylate（BA） and 2 - ethylhexylacrylatc（EHA） played as core monomer and copolymerized with a small amount of organotin. Then,P（BA- EHA）/PVC blending modifier was synthesized through the copolymerization of P（BA - EHA） with vinyl chloride（VC）. The morphological structure of complex latex particle and blends,influences of organotin contents in blending modifier on the mechanical properties of blending modtified PVC and the heat stability of composite particles were investigated by transmission electron micrcscope（TEM） ,dynamic mechanics analyzer （DMA）and scanning electron microscope（SEM）. The results obtained from DMA and TEM showed that the compatibility of rubber phase with PVC was obviously improved with the addition of composite particles, good dispersity and homogeneity were obtained for P（BA- EHA） in PVC. The SEM photoes showed that the notched cross section of blending materials had excellent matrix yielding type of fracture toughness.

关 键 词：P(BA-EHA)/PVC 有机锡 PVC 共混改性 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]