SEBS弹性体对聚丙烯形貌、力学性能和结晶性能的影响  

Influence of SEBS Elastomer on Morphology,Mechanical and Crystallization of Polypropylene

作　　者：伍增勇[1] 彭娅[1] 童荣柏[1] 王柯[1] 李峥[1] 李婕[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《塑料》2010年第3期37-40,共4页Plastics

基　　金：西华大学人才引进项目(0421127);西华大学特种材料及制备技术省高校重点实验室开放研究基金(SZJJ2009-017)

摘　　要：采用SEBS(氢化SBS)弹性体增韧PP。利用SEM、DSC、熔体指数、力学性能测试等研究不同SEBS含量的PP/SEBS共混物的力学性能、微观形态结构以及结晶性能。结果表明:SEBS可均匀分布在基体中,改善PP的加工流动性;SEBS的加入使得PP的球晶尺寸减小,结晶度降低;随着SEBS含量增加,共混物的冲击韧性有较大幅度的提高,而屈服强度略有下降:当加入25%的SEBS时,PP/SEBS共混物的冲击强度比纯PP提高近26倍,拉伸强度则仅仅降低23%。SEBS elastmoer（ styrene-ethylene/butylene-styrene triblock copolymer）was utilized as a toughening agent for PP. The mechanical properties, morphology and crystal properties of PP/SEBS blends with different content of SEBS were studied by SEM, DSC, melt flow index, notched impact and tensile properties tests. It revealed that SEBS dispersing uniformly in PP matrix could not only improve the processing flowability but also decrease both the crystal size and crystallinity of PP. In PP/SEBS blends, although the tensile properties declined a little, the impact strength increased considerably. When adding 25 % content SEBS,the impact strength of PP/SEBS blends was nearly 26 times higher than that of pure PP while the tensile strength of PP/SEBS only reduced by 23 % of pure PP.

关 键 词：PP SEBS 增韧 力学性能 结晶 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]