论文部分内容阅读
采用甲基丙烯酸缩水甘油酯接枝聚丙烯(PTT/PP-g-GMA)、纳米SiO2增韧聚对苯二甲酸丙二醇酯(PTT)。研究了制备工艺、PTT/PP-g-GMA/纳米SiO2用量对三元复合材料的形态、力学性能及结晶性能的影响。研究表明,一步法制备的复合材料具有PTT/PP-g-GMA和纳米SiO2各自独立分散的形态,两步法制备的复合材料具有PTT/PP-g-GMA包覆纳米SiO2的核壳结构。两种方法制备的复合材料的拉伸强度接近,采用两步法制备的复合材料具有更好的增韧效果,冲击强度提高161.9%。PTT/PP-g-GMA与纳米SiO2对PTT的结晶都有促进作用,一步法中纳米SiO2的异相成核作用更为明显。
Glycidyl methacrylate grafted polypropylene (PTT / PP-g-GMA) and nano-SiO2 toughened polytrimethylene terephthalate (PTT) were used. The effects of preparation technology, dosage of PTT / PP-g-GMA / nano-SiO2 on the morphology, mechanical properties and crystallinity of ternary composites were studied. The results show that the composites prepared by one-step method have the independent dispersed forms of PTT / PP-g-GMA and nano-SiO2. The two-step composite prepared by PTT / PP-g-GMA has the core-shell structure of nano- The tensile strength of the composite prepared by the two methods is close to that of the composite prepared by the two-step method, and the impact strength is improved by 161.9%. PTT / PP-g-GMA and nano-SiO2 have a promoting effect on the crystallization of PTT, heterogeneous nucleation of nano-SiO2 is more obvious in one-step method.