材料科学
共聚物
混溶性
氯乙烯
丙烯腈
复合材料
苯乙烯
热变形温度
丙烯酸丁酯
丙烯酸酯
韧性
高分子化学
聚合物
艾氏冲击强度试验
极限抗拉强度
作者
Xueqiang Zhang,Jun Zhang
摘要
ABSTRACT In this work, acrylonitrile–styrene–acrylate (ASA) terpolymer was used to toughen rigid poly(vinyl chloride) (PVC). ASA has a core–shell structure, where the poly(butyl acrylate) (PBA) serves as the soft core while styrene‐acrylonitrile (SAN) copolymer works as the rigid shell. Herein, The PBA core content in ASA was varied from 0 to 80 wt %, and its effect on the physiochemical properties was investigated. It was found that the hard shell of ASA was miscible with PVC matrix, providing good interfacial adhesion between ASA and PVC. Increasing the soft PBA content considerably improved the room‐temperature impact toughness, and a sharp brittle–ductile transition (BDT) as a function of PBA content was observed. However, as the testing temperature decreased to 0 and −30 °C, the toughening effect became limited, and the BDT first shifted to high PBA content region and finally disappeared. It was suggested that whether the toughening effect can be achieved depended on the thickness of hard shell and the relaxation behavior of PBA core. Albeit the loss in rigidity was accompanied, the accomplished toughening effect was not on the sacrifice of heat distortion temperature. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46839.
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