摘要
将苯乙烯-丙烯腈共聚物接枝聚丁二烯(PB-g-SAN)与苯乙烯-丙烯腈共聚物(SAN)树脂按照一定比例熔融共混制备具有不同橡胶含量的丙烯腈-丁二烯-苯乙烯共聚物(ABS)树脂。研究了橡胶含量对ABS树脂的冲击和拉伸行为的影响,以及ABS树脂的微观形态及形变机理。结果表明,ABS材料的冲击强度随着橡胶含量的增加先升高后降低;断裂伸长率随着橡胶含量的增大而增大;当橡胶含量较少时,橡胶粒子在基体相中发生聚集现象的可能性较小,分散性较好;随着橡胶粒子含量的增加,ABS树脂的主要增韧机理是由空洞化到银纹再到剪切屈服的转变。
A series of acrylonitrile-butadiene-styrene copolymers （ABS） were prepared by melt blending PB-g-SAN with styrene-co-acrylonitrile （SAN）. The effect of rubber content on the impact and tensile properties of ABS was investigated. The dispersion morphology and deformation mechanism were studied. It was found that the impact strength increased firstly and then decreased with increasing rubber content. The elongation at break increased with the increasing of rubber content. A uniform dispersion of rubbery particle in the matrix could be observed when the rubber content was lower. The main deformation mechanism of the ABS resin was changed from cavitations to the craze and then shears yielding, with increasing rubber content.
出处
《中国塑料》
CAS
CSCD
北大核心
2013年第9期22-27,共6页
China Plastics
关键词
丙烯晴-丁二烯-苯乙烯共聚物
橡胶含量
冲击强度
微观形态
形变机理
acrylonitrile-butadiene-styrene copolymer
rubber content
impact strength
micro mor-phology
deformation mechanism
