以聚丁二烯橡胶为增韧剂, 用本体聚合方法合成了一系列丙烯腈--丁二烯--苯乙烯三元共聚物(ABS), 并研究其力学性能。结果表明: 高顺胶BR9004的增韧效果最好, IZOD缺口冲击强度高达236.1 J/m, 与低顺胶700A的复合可使后者的综合力学性能提高(可与高桥8434牌号产品相媲美); 随着丙烯腈含量和树脂相分子量的增加,材料的IZOD缺口冲击强度、拉伸强度和断裂伸长率均有所提高; 而树脂的拉伸强度则随着橡胶含量的增加而降低; 在橡胶含量低于20\%时冲击强度随着橡胶含量增长迅速, 高于20%时增长缓慢。
A series of acrylonitrile–butadiene–styrene terpolymers (ABS) were synthesized by bulk polymerization using polybutadiene rubber as toughener. The mechanical properties of the resultant materials were investigated. The results show that high–cis rubber BR9004 has the best toughening effect far superior to the rest, and the IZOD notched impact strength of the relative material reaches 236.1 J/m; when it is combined with low–cis rubber 700A, the comprehensive mechanical properties of the later is comparable to Gaoqiao product (ABS 8434). The impact strength, tensile properties and elongation at break of materials increase with the increase of acrylonitrile content and molecular weight of resin phase. However, the tensile properties decrease with the rubber content increasing. The impact strength increases rapidly when the content of rubber is lower than 20%, but increases slowly when higher than 20%.
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