球磨法制备聚氯乙烯/氯化聚乙烯复合粒子及其对聚氯乙烯的增韧作用  

Toughening Effect of Polyvinyl Chloride/Chlorinated Polyethylene Master-Batch Prepared by Ball-Milling Method on Polyvinyl Chloride

作　　者：李雪健 熊英[1] 郭少云[1] Xuejian Li;Ying Xiong;Shaoyun Guo(Polymer Research Institute of Sichuan University,State Key Laboratory of Polymer Materials Engineering,Chengdu 610065,China)

机构地区：[1]四川大学高分子研究所高分子材料工程国家重点实验室

出　　处：《高分子材料科学与工程》2019年第7期100-107,共8页Polymer Materials Science & Engineering

基　　金：国家自然科学基金创新研究群体科学基金(51721091)

摘　　要：采用球磨法对聚氯乙烯(PVC)和氯化聚乙烯(CPE)进行固相力化学处理,制得复合粒子MGC,研究了MGC对PVC的增韧增强作用及机理。与PVC/CPE相比,PVC/MGC(Y2G0.5)复合材料的拉伸强度、断裂伸长率和冲击强度分别提高了1.39%、92.11%和472.91%。分析测试结果表明,两步法球磨有利于使CPE包覆在PVC初级粒子表面,并生成部分接枝共聚物PVC-g-CPE,两相界面作用得到提高,从而使CPE在PVC体系中呈类网状结构分布,应力场体积增加直至应力网络完全构建,使材料在断裂过程中基体发生完全屈服,最终产生韧性断裂。In this paper,ball-milling method was used to prepare a kind of polyvinyl chloride(PVC)/chlorinated polyethylene(CPE)master-batch named MGC.The toughening and strengthening effect of MGC on PVC and its mechanism were studied.Compared with PVC/CPE,the tensile strength,elongation at break and impact strength of PVC/MGC(Y2G0.5)composites were increased by 1.39%,92.11%and 472.91%,respectively.Results show that cladding of CPE on the surface of PVC primary particles,along with the grafted copolymer PVC-g-CPE can improve the two-phase interface generated during the two-step ball-milling process.Then,a network structure of CPE phase is formed,which also promote the increment of the stress field volume until a whole stress network is build.The formation of phase and stress network structure can effectively terminate the crazing and induce the matrix to yield completely,finally result in a ductile fracture.

关 键 词：聚氯乙烯 氯化聚乙烯 球磨法 增韧改性 

分 类 号：TB332[一般工业技术—材料科学与工程]