摘要
基于毛细管内缠结-卷曲分子统计力学的高分子口模胀大理论(适合长毛细管),考虑入口效应和出口胀大演变过程建立了适合长、短毛细管的聚合物挤出胀大统一模型;能分析胀大比受粘弹参数、材料结构、流场特征、入口效应、操作条件和出口介质条件等的影响。模型很好分析了几种塑料、溶液、填充复合材料及橡胶的挤出胀大比数据;首次定量表达了胀大演化的过程,说明模型有一定的合理性。
One systematical swell theory was developed for both in long and short capillaries when modifying the Song′s theory considering molecular dyanmics of disentanglement-entanglement and discoil-recoil in capillary by incorporating entry effect and the swelling evolution out of capillary.The model unified several previous theories and experimental summations.Thus,the ultimate swell ratio is the functions of material parameters,flow field characteristics,length-diameter ratio,the reservoir-capillary entry effect and the outside swell environment and so on.The relations were verified by several sets of experimental swell ratio data for plastics melt,solution,particle-filled composite and rubber.The reported swelling evolution was first proved as a finite progression by the simulation.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2011年第1期161-165,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51073021)
关键词
挤出胀大
定量模型
毛细管
操作变量
聚合物
extrudate swell
quantitative model
capillary
operational variable
polymer
