聚丙烯/聚苯乙烯共混合金Ⅱ.结晶和性能  

STUDY ON THE PP/PS BLEND ALLOY Ⅱ. THE CRYSTALLIZATION AND PROPERTIES

作　　者：陈晔[1] 马桂秋[1] 沈宁祥[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《高分子材料科学与工程》2002年第6期178-180,183,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助课题 (5 973 3 0 70)

摘　　要：用偏光显微镜、DSC、DMA分析法和拉伸试验等方法对 PP/ PS/ PP- g- PS熔融共混合金的结晶行为、形态和拉伸强度进行了研究。结果表明 ,PP- g- PS减轻了 PS相对 PP相结晶行为的干扰 ,合金的拉伸强度明显上升。上述变化均与 PP- g-In our preliminary study, it has been revealed that the particle size of dispersion phase at PP/PS alloy and the homogeneity of PP/PS alloy were improved after the graft copolymer PP-g-PS. At present the influence of PP-g-PS on the crystal morphology, crystal behavior and mechanical property of PP/PS alloy will be reported further. The test results of optical polarizing microscope and DSC show that the PP/PS alloy and PP/PS/PP-g-PS alloy exhibits different crystalline behavior. The size of PS phase of PP crystal at PP/PS/PP-g-PS alloy is lower than at PP/PS alloy, but the crystallinity of PP phase at PP/PS/PP-g-PS alloy is higher than at PP/PS alloy. These changes increase when the PP-g-PS content increases. Tensile test shows that PP/PS alloy without PP-g-PS exhibits poor tensile strength owing to weak interfacial adhesion. However PP/PS alloy with improved mechanical properties can achieved by addition of PP-g-PS as a compatibilizer because its addition to the alloy can enhance the adhesion between the PP and PS phases.

关 键 词：聚丙烯 聚苯乙烯 共混合金 结晶 性能 PP-g-PS接枝共聚物 拉伸强度 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TQ325.2