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以乙烯-丙烯酸共聚物(EAA)为相容剂,聚酯型弹性体(TPEE)为增韧材料,回收聚对苯二甲酸乙二醇酯(rPET)为基体材料,通过熔融挤出、注射成型方法制备了r-PET/TPEE/EAA共混材料。采用扫描电镜(SEM)、差示扫描量热仪(DSC)、转矩流变仪测试并分析了EAA对r-PET/TPEE共混材料界面性能、结晶性能、流变性能的影响,并测试了共混材料的力学性能。结果表明:随着EAA用量的增加,r-PET/TPEE/EAA共混材料的缺口冲击强度和断裂伸长率先增大后减小,而弯曲强度和拉伸强度略有下降。含5%EAA的r-PET/TPEE/EAA共混材料中,TPEE颗粒嵌入rPET基体材料中,r-PET与TPEE界面粘结力增强,与纯r-PET相比,共混材料的熔融温度降低了9.40℃,过冷度下降了11.84℃,结晶温度上升了2.44℃,流动速率增大;其缺口冲击强度和断裂伸长率分别比纯r-PET提高了96.34%和183.92%。
Using ethylene-acrylic acid copolymer (EAA) as compatibilizer and polyester elastomer (TPEE) as toughening material, polyethylene terephthalate (rPET) was recycled as matrix material, and melt extrusion and injection Forming method r-PET / TPEE / EAA blends were prepared. The effects of EAA on the interfacial properties, crystallinity and rheological properties of r-PET / TPEE blends were investigated by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and torque rheometer. The mechanical properties of blends. The results showed that the notched impact strength and elongation at break of r-PET / TPEE / EAA blends first increased and then decreased with the increase of EAA content, while the flexural strength and tensile strength decreased slightly. In the r-PET / TPEE / EAA blends with 5% EAA, the TPEE particles were embedded in the rPET matrix and the interfacial adhesion between r-PET and TPEE was enhanced. Compared with pure r-PET, the melting temperature Decreased by 9.40 ℃, the undercooling decreased by 11.84 ℃, the crystallization temperature increased by 2.44 ℃, the flow rate increased; the notched impact strength and elongation at break increased by 96.34% and 183.92% respectively compared with pure r-PET.