两种不同橡胶粒径的ABS树脂协同作用研究

摘要

采用两种不同橡胶粒径的丙烯腈-丁二烯-苯乙烯共聚物（ABS）掺混制备橡胶粒子尺寸双峰分布的ABS树脂。恒定ABS树脂的橡胶含量，通过调节不同粒径橡胶的质量比，考察其对ABS树脂力学性能的影响，并利用扫描电子显微镜和透射电子显微镜观察了ABS树脂的微观结构，分析了协同作用的增韧机理。结果表明，ABS树脂的冲击强度和屈服强度都随着大粒径橡胶粒子比例的减少而增大；当L-PB／S-PB为1／9时，ABS树脂的冲击强度和屈服强度最高，两种橡胶粒子发生了明显的协同作用。%In this work, acrylonitrile-butadiene-styrene copolymers （ABS） were prepared based on different rubber particle sizes （L-PB and S-PB）. Effect of weight ratio of L-PB to S-PB on the mechanical properties of ABS resins was investigated when the rubber content was fixed at 15 %. It indicated that the impact and yield strengths increased with decreasing bigger rubber particles L-PB. When the ratio of L-PB to S-PB was 1/9, the impact and yield strengths were the highest. Synergistic effect of rubber particles with different particle sizes was found. Moreover, deformation mechanisms of ABS resins were also investigated.