摘要
采用带流变槽的 HAAKE 流变仪研究了乙烯-辛烯共聚物(POE)和甲基丙烯酸缩水甘油酯接枝乙烯-辛烯共聚物(POE-g-GMA)与聚对苯二甲酸丁二醇酯(PBT)共混物的黏度随共混时间的变化过程,并对这两种共混物的断面形貌和力学性能进行对比分析。结果表明,由于 POE-g-GMA 能够与 PBT 发生原位增容反应,使得 POE-g-GMA颗粒的粒径小、分散均匀,体系黏度随共混时间先长时间持续上升,然后保持不变,体系最终黏度也随着 POE-g-GMA浓度升高而升高;然而在不发生反应的 PBT/POE 体系中,POE 颗粒分散性差,颗粒粒径大,体系黏度受 POE 的浓度影响相对较小且随时间基本上保持不变。由于 POE-g-GMA 与 PBT 之间的增容反应使得 PBT/POE-GMA 的力学性能优于 PBT/POE,并且冲击强度随 POE-g-GMA 浓度呈现两个阶段变化,即低于临界浓度时冲击强度缓慢升高,高于临界浓度时冲击强度快速升高。
Poly（butylene terephthalate） （PBT） was blended with neat and glycidyl methacrylate grafted poly（ethylene octene） （POE） and POE-g-GMA） separately using a HAAKE rheometer. The viscosity and morphology of the blends were also investigated. Due to the compatibilization reaction between POE-g-GMA and PBT, the diameters of POE-g-GMA particles in PBT matrix were much smaller and more uniformly than those for neat POE blends. The viscosities of PBT/POE-g-GMA blends increased with blending time slowly and leveled off at high value, in contrast, that of PBT/POE changed a little with blending time. The mechanical properties of PBT/POE-GMA were superior to those of PBT/ POE. Above a critical content, the Izod impact strength increased rapidly with POE-GMA content.
出处
《中国塑料》
CAS
CSCD
北大核心
2007年第10期40-44,共5页
China Plastics
