连续本体法耐热ABS树脂的开发

Study on Heat-resistant ABS Resin Prepared by Continuous Bulk Polymerization

以N-苯基马来酰亚胺(NPMI)、丙烯腈(AN)、苯乙烯(SM)和二烯橡胶(BR)为原料,采用连续本体聚合技术合成了NPMI-AN-SM-BR四元共聚物。研究了NPMI用量、聚合温度、进料方式等对产品性能的影响。结果表明:随着NPMI用量的增加,共聚物的维卡软化点和热变形温度显著提高,熔体流动速率则有所下降。通过工艺条件和工艺配方的优化调整,获得了性能与目标牌号一致,某些性能甚至高于目标牌号的耐热ABS产品BH-102H和BH-202。利用HAAKE流变仪对其和相应目标产品的加工性能进行了横向比较,表明所开发材料的加工性良好,能够满足应用要求。

N-phenyleimide-arcylonitrile-styrene-butadiene （NPMI-AN-St-BR） tetrapolymer was prepared via continuous bulk polymerization. The effects of NPMI content, polymerization temperature, and feed patterns,etc, on the properties of the products were investigated. Thermal analysis indicated that both Vicat softening point and heat distortion temperatures of the tetrapolymer elevated rapidly with the increasing content of NPMI, whereas the melt flow rate decreased. The comprehensive properties of the tetrapolymer were comparable or superior to two important heat-resistant ABS resins （BH-102H and BH-202）. Rheological measurement with torque rheometer showed that the tetrapolymer possessed good processibility.