PBT/OMMT共混体系的非等温结晶行为

Non-Isothermal Crystallization Behavior of PBT/OMMT Composite

通过熔融共混法制备了聚对苯二甲酸丁二醇酯/有机蒙脱土(PBT/OMMT)复合材料,并对其非等温结晶性能和力学性能进行了研究。结果表明:随着OMMT含量的增加,PBT/OMMT复合材料的结晶峰温向高温方向移动,结晶峰变得狭窄且半结晶时间变得更短;随着冷却速率的增加,PBT/OMMT复合材料的结晶峰温度向低温移动且半结晶时间变得更短。利用热台偏光显微镜观察PBT和PBT/OMMT复合材料的球晶形态,PBT/OMMT复合材料球晶相比纯PBT变得更小,且边界更不清晰。

PBT/OMMT composite was prepared by melt blending method,and its non-isothermal crystallization behavior and mechanical, properties were tested and analyzed. With OMMT content increased, the crystalline peak of PBT/OMMT composite moved towards the high temperature, the crystalline peak became narrower and the half crystalline time became shorter and that with cooling rate increased, the crystalline peak temperature of PBT/OMMT composite moved towards the lower temperature, and the half crystalline time became shorter were indicated. The spherulitic morphology of PBT and PBT/ OMMT composite crystallization was observed by polarizing microscope （ POM ） , and the spherulite size of PBT/OMMT composite was largely smaller than that of PBT.