论文部分内容阅读
以回收聚对苯二甲酸乙二醇(酯rPET)为基体材料,丙烯腈-丁二烯-苯乙烯共聚(物ABS)为增强材料,甲基丙烯酸缩水甘油酯接枝聚苯乙烯(PS-g-GMA)为增容剂,制备了rPET/ABS共混物。采用SEM、DSC等方法对共混物的形态结构、结晶性能和力学性能进行了表征。结果表明:与纯rPET相比,ABS增韧后的rPET缺口冲击强度和断裂伸长率分别提高了54.0%和47.2%,弯曲强度和拉伸强度略有下降,熔融温度下降了1.27℃,结晶温度升高了31.22℃,结晶速度明显加快;PS-g-GMA的加入改善了rPET/ABS共混物的两相界面结合力,细化了两相结构;与纯rPET相比,含1%PS-g-GMA的rPET/PS-g-GMA/ABS共混物的缺口冲击强度提高了72.5%断,裂伸长率提高了71.7%。
In order to recover polyethylene terephthalate (rPET) as matrix material, acrylonitrile-butadiene-styrene copolymer (ABS) as reinforcing material, glycidyl methacrylate grafted polystyrene (PS- g-GMA) as a compatibilizer, an rPET / ABS blend was prepared. The morphology, crystallinity and mechanical properties of the blends were characterized by SEM and DSC. The results showed that the impact strength and elongation at break of rPET increased by 54.0% and 47.2%, the flexural strength and tensile strength decreased slightly, the melting temperature decreased by 1.27 ℃ and the crystallization The temperature was increased by 31.22 ℃, the crystallization speed was significantly accelerated. The addition of PS-g-GMA improved the interfacial adhesion of rPET / ABS blends and refined the two-phase structure. Compared with pure rPET, The notched impact strength of PS-g-GMA rPET / PS-g-GMA / ABS blend increased by 72.5% and the elongation at break increased by 71.7%.