增容剂对PUR-T/PP共混体系形态与性能的影响  

EFFECT OF COMPATILIZERS ON MORPHOLOGY AND PROPERTIES OF PUR-T/PP BLENDS

作　　者：管兰芳[1] 樊卫华[1] 陈金周[1] 谭晓莉[1] 李新法[1] 王经武[1] 

机构地区：[1]郑州大学材料工程学院,郑州450052

出　　处：《工程塑料应用》2006年第4期10-13,共4页Engineering Plastics Application

基　　金：河南省科技攻关项目(4242700112)

摘　　要：利用双螺杆挤出熔融共混方法制备了以癸二胺、十二碳二胺分别与聚丙烯(PP)接枝物的共聚物(分别记为PN1和PN2)及EPDM-g-MAH作为增容剂的热塑性聚氨酯(PUR-T)/PP(质量比为80∶20)共混体系,考察了不同增容剂对共混体系力学性能的影响,并用扫描电子显微镜(SEM)对不同体系的微观形态进行了观察。结果表明,3种增容剂的增容效果由大到小的排列顺序为:PN2>PN1 EPDM-g-MAH,这主要是由于接枝在PP上的氨基与PUR-T的反应活性远远高于MAH基团,因此以PN1和PN2增容的体系表现出更好的协同作用,从而使得共混体系具有较高的拉伸强度、断裂伸长率和较稳定的形态结构,且当增容剂含量为5份时,共混体系的性能最好。The blends of thermoplastic polyurethane （PUR-T） and polypropylene （PP） were prepared by.melt blending PUR-T and PP with two different primary amine functionalized PP （PN1, PN2） and EPDM-g-MAH as compatilizer respectively. The effects of the compatilizer on mechanical properties of the blends were studied, and the morphology of different blends was observed by scanning electric microscope. The result showed that the compatilization effect of three compatilizers was ranked in a decreasing order as follows; PN2 〉 PN1 ≥ EPDM-g-MAH. When reacting with PUR-T, the reaction activity of amino group grafting on PP was far higher than that of MAH group. Accordingly, the PUR-T/PP blends with PN1 and PN2 exhibited much better synergy, higher tensile strength and elongation at break and more stable morphology. Additionally, the optimum properties was achieved when the content of compatilizers was 5%.

关 键 词：聚丙烯 热塑性聚氨酯 增容剂 力学性能 形态 

分 类 号：TQ633[化学工程—精细化工] O631.21[理学—高分子化学]