动态硫化增韧Co-PP／EVA共混物研究  

Study on Co-PP/EVA Blends Toughened by Dynamic Vulcanization

作　　者：夏英[1] 翁伟明[1] 张澜[1] 

机构地区：[1]大连工业大学,纺织与材料工程学院材料系,辽宁大连116034

出　　处：《现代塑料加工应用》2012年第4期10-13,共4页Modern Plastics Processing and Applications

基　　金：大连市科技攻关项目基金(2012A17GX130)资助

摘　　要：研究了动态硫化和简单共混增韧共聚级聚丙烯(Co-PP)/乙烯-醋酸乙烯酯共聚物(EVA)共混物的力学性能、流动性能、形态结构和脆韧转变。结果表明:动态硫化共混物力学性能尤其是冲击强度明显优于简单共混物的,流动性则差于简单共混物的,动态硫化共混物中EVA颗粒尺寸小于简单共混物的;采用Wu氏增韧理论对2种共混物的脆韧转变进行了分析,动态硫化共混物的临界基体层厚度约为0.55μm,简单共混物的临界基体层厚度约0.60μm。. The mechanical properties, flowing behavior, morphology, and brittle-duc- tile transition of copolymerized polypropylene （Co-PP）/poly[ethylene-co-（vinyl acetate）] （EVA） blends based on dynamic and non-dynamic vulcanization were studied. The re- sults show that the mechanical properties of dynamic vulcanization blends, in particular the impact strength, are better than those of non-dynamically vulcanized blends, the flowing behavior of the dynamically vulcanized blends is slightly worse than that of non- dynamically vulcanized blends, and the EVA particle size of the dynamically vulcanized blends is smaller than that of non-dynamically blends. The percolation theory put for- ward by Wu is used to analyse the brittle-ductile transition of these two kinds of blends. The critical matrix thickness of dynamic and non-dynamic vulcanized blends is 0.55 μm and 0.60 μm,respectively.

关 键 词：共聚级聚丙烯 乙烯-醋酸乙烯酯共聚物 动态硫化 增韧 力学性能脆韧转度 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]