强韧化PBT/PC共混物的制备与性能

采用自制的甲基丙烯酸缩水甘油酯熔融接枝丙烯腈丁二烯苯乙烯三元聚合物\ABS-g-(GMA-co-St),AGS]为改性剂，对聚对苯二甲酸丁二醇酯（PBT）/聚碳酸酯(PC)（80/20）共混物进行改性研究。通过扫描电子显微镜、差示扫描量热仪、力学性能和流变性能测试研究了改性后共混物的性能。结果表明，随着AGS含量的增加，共混物中两相间的界面黏结增强； AGS对PBT/PC共混物具有强韧化的作用，与未添加AGS的PBT/PC共混物相比，当AGS含量为10份时，共混物的缺口冲击强度和拉伸强度分别提高了49.8 %和17.4 %；AGS的加入提高了共混物的界面强度和相容性；添加AGS能够提高共混物的结晶峰温度，起到促进晶粒生长的作用。

Preparation and Properties of Strengthened and Toughened PBT/PC Blends

Glycidyl methacylate functionalized acrylonitrile butadiene styrene copolymer\ABS-g-(GMA-co-St), AGS] was prepared by melting grafting and was used to modify poly(butylene terephthalate)/polycarbonate (PBT/PC=80/20) blends. SEM showed that the interfacial adhesion between PBT and PC was improved with increasing AGS content. The addition of 10 wt % of AGS caused 49.8 % and 17.4 % increments in notched impact strength and tensile strength of the PBT/PC blends, respectively, the interfacial bonding strength and miscibility of the blends were also enhanced. In addition, DSC test indicated that the incorporation of AGS increased the crystallization peak temperature and spherulite growth rate of the blends.