摘要
通过在线测定聚合反应体系黏度,取样分析相差图片中聚合物形貌、橡胶粒径,产品的TEM表征结果以及测试产品的物理力学性能等,考察了本体ABS聚合过程中,橡胶相和SAN基质相的相态变化过程、橡胶粒子的形成过程以及橡胶相态结构对物理力学性能的影响。结果表明:随着聚合反应的进行,反应体系黏度不断升高,经历两相转变时体系黏度急剧下降,而后逐渐升高;相转变后橡胶粒子经历从大到小的形成过程并逐步稳定,最终以包藏结构存在于ABS产品中,这种包藏结构能显著提高ABS产品的韧性,缺口冲击强度提高20%,断裂伸长率提高2倍以上。
Through online measuring reaction system viscosity, and analyzing the polymer morphology by phase contrast photo and rubber particle size, TEM characterization results and physical mechanical properties of products, the phase inversion of the rubber and SAN matrix phase and the formation of rubber particle procedure in the ABS bulk polymerization process were investigated, and the effect of rubber phase structure on physical mechanical properties of product was researched too. The results show that： the viscosity of the polymerization system increases with the development of polymerization reaction. Through phase inversion, the system viscosity falls sharply, and then increases again. After phase inversion, rubber particles change from large to small in the forming process and gradually stable; finally occluding structure existing in ABS products is formed, and the occluding structure has a significantly positive impact on the toughness of ABS product. The notched impact strength increases by 20% and the elongation at break increases more than two times.
出处
《塑料科技》
CAS
北大核心
2014年第3期66-69,共4页
Plastics Science and Technology
