POM/TPU共混合金非等温结晶动力学研究  

Non-isothermal Crystallization Kinetics of POM/TPU Blends

作　　者：文志红[1] 李宝龙[1] 刘娜[1] 尚翠[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《天津科技大学学报》2014年第5期48-52,64,共6页Journal of Tianjin University of Science & Technology

摘　　要：通过布拉本德单螺杆挤出机熔融共混挤出制备聚甲醛/热塑性聚氨酯(POM/TPU)共混合金.采用差示扫描量热仪(DSC)和热台偏光显微镜(HS-PLM)对POM/TPU共混合金的非等温结晶动力学及POM球晶生长形态进行跟踪观察.结果表明:采用莫志深法对POM/TPU共混合金的非等温结晶动力学分析结果与Jeziorny法相吻合;POM结晶过程中同时存在均相成核和异相成核,TPU提高了POM的结晶完善性.Blends of polyoxymethylene and thermoplastic polyurethane（POM/TPU）were prepared by melting blending through Brabender single screw extruder. Non-isothermal crystallization kinetics and spherulite morphology of POM/TPU blends were characterized by differential scanning calorimeter（DSC）and hot stage polarizing light microscopy（HS-PLM）, respectively. It is found that non-isothermal crystallization kinetics of POM/TPU blends analysed with Mo’s equation and Jeziorny method achieved the same result. Homogeneous nucleation and heterogeneous nucleation both existed during crys-tallization,with indicates TPU accelerated the crystallinity of POM slightly.

关 键 词：聚甲醛 热塑性弹性体 非等温结晶动力学 球晶生长 

分 类 号：TQ326.51[化学工程—合成树脂塑料工业]