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合成了甲基丙烯酸环氧丙酯(GMA)接枝的丙烯腈-丁二烯-苯乙烯(ABS-g-GMA)核壳粒子增韧聚对苯二甲酸丁二醇酯(PBT),加入环氧树脂(Epoxy)为扩链剂进一步提高共混物的性能。红外光谱(FTIR)结果表明:GMA成功接枝到ABS粒子上;研究发现不同GMA含量的ABS-g-GMA粒子在PBT及PBT/Epoxy共混物中均匀分散;ABS-g-GMA对PBT增韧效果较好,Epoxy进一步提高了PBT/ABS-g-GMA共混物的冲击韧性及拉伸强度;ABS-g-GMA增韧PBT的机理是橡胶粒子的空洞化和PBT基体的剪切屈服。
GMA grafted ABS-g-GMA core-shell particles toughening polybutylene terephthalate (PBT) were synthesized. Epoxy as a chain extender to further improve the performance of the blend. FTIR results showed that GMA was successfully grafted onto ABS particles. It was found that ABS-g-GMA particles with different GMA content were uniformly dispersed in PBT and PBT / Epoxy blends. The effect of ABS-g-GMA on PBT The toughening effect is better and Epoxy further improves the impact toughness and tensile strength of PBT / ABS-g-GMA blends. The mechanism of toughening PBT by ABS-g-GMA is the cavitation of rubber particles and shear yielding of PBT matrix .