摘要
利用RH7双柱型毛细管流变仪对瓶片聚酯及纺丝级聚酯熔体的流变性能进行了对比研究。讨论剪切速率和温度对表观粘度、非牛顿指数、结构粘度指数及粘流活化能的影响。结果表明:两种熔体都属于非牛顿假塑性流体,表观粘度都随着剪切速率和温度的增加而降低;在相同的温度下,瓶片聚酯熔体的非牛顿指数比纺丝级聚酯熔体的小,而结构粘度指数则比后者大;两种熔体的粘流活化能均随剪切速率的增大而减小。
The melt rheological properties of bottle and fiber grade polyester are comparatively studied by double capillary rheometer RH 7D.The influence of shear rate and temperature on the apparent viscosity,non-Newtonian index,structural viscosity index,and activation energy for viscous flow are discussed.The results show that the two kinds of melt belong to non-Newtonian pseudoplastic fluid and the apparent viscosity decreases with the increasing of shear rate and temperature.At the same temperature,the non-Newtonian index of bottle grade melt is smaller than that of fiber grade polyester,but the structural viscosity index is larger than fiber grade polyester.The activation energy for viscous flow of two kinds of melt decreases with the increasing of shear rate.
出处
《浙江理工大学学报（自然科学版）》
2011年第2期182-186,共5页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
浙江省重大科技攻关项目(2009C03003)
关键词
瓶片聚酯
流变性能
非牛顿指数
假塑性流体
bottle grade polyester
rheological properties
non-Newtonian
pseudoplastic fluid
