【摘要】 用已扩链增黏的回收聚对苯二甲酸乙二醇酯(PETr)及改性聚碳酸酯(PC),并通过熔融反应挤出制备了PC/PETr合金,采用相容剂乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯(E-MA-GMA)对PC/PETr合金进行增容。研究了相容剂用量对该合金拉伸强度、冲击强度和形态结构等的影响。结果表明,当m(PC)/m(PETr)为60:40,相容剂E-MA-GMA的质量分数为7.5%时,合金发生脆韧转变,缺口冲击强度达到58.76kJ/m2,同时拉伸强度达到49.96MPa。SEM观察发现,E-MA-GMA作为反应性增容剂,使得分散相PET颗粒变细。并且,随着E-MA-GMA用量的增加,PET在PC/PETr/E-MA-GMA共混体系中呈现出极不规则的近似条状或片状的形态结构,共混体系呈现出双连续相更多还原

【Abstract】 Polycarbonate was modified with recycled PET which had been modified to achieve a good chain extension.PC/Recycled PET alloy was prepared through reactive extrusion technology,and with E-MA-GMA as the compatibilizer to compatilize the alloy.The effects of the content of the compatibilizer on the tensile strength,impact strength and morphological sturcture of the alloy were studied.The results showed that when the mass ratio of PC to PETr was 60:40,and the mass fraction of E-MA-GMA was 7.5%,brittle-ductile transition was occured on the alloy.The notched impact strength and tensile strength can reach 58.76 kJ/m2 and 49.96 MPa.Through SEM study,it was found that E-MA-GMA as the reactive compatibilizer,dispersed phase PET particles changed thinner.With the content of E-MA-GMA increasing,PET in the PC/PET/E-MA-GMA blends shows a very irregular structure similar to strip or flake.The blending system shows two-continuous phase.更多还原