【作者】 吴其晔； 冯绍华； 慕晶霞； 张娜； 王笃金；

【Author】 Wu Qiye Feng Shaohua Mu Jinxia Zhang Na Wang Dujin (Key Laboratory of Rubber-Plastics, Ministry of Education, Qingdao University of Science and Technology, Qingdao, 266042, China)

【机构】 青岛科技大学教育部橡塑材料与工程重点实验室；

【摘要】 <正>通过反应加工控制影响聚丙烯降解的因素,中科院化学所制备了精确控制分子量和分子量分布的聚丙烯树脂,用于研发新型高性能聚丙烯纤维及合金化丙纶纤维,主要分子结构参数见表1。本文研究不同分子量聚丙烯熔体的流变性。更多还原

【Abstract】 Several PP samples with different molecular weight were prepared by reactive extruded degrading. Their rheological properties were studied by a double capillary rheometer RH2000. The results indicate that, the shear viscosity and inlet pressure drop of PP melts decreased both with the degradation of molecular weight of PP melts. But the fluid activation energies of different samples change a little. The influences of shear rate, temperature on shear viscosity and inlet pressure drop accorded with the normal rules, but the flow instability was serious with the decrease of molecular weight of PP melts.更多还原