减轻聚合物熔体挤出整体畸变和熔体破裂的辩证对策  

The Ways to Improvement of Integral Distortion and Melt Fracture of Polymer Extrudate

作　　者：吴其晔[1] 李鹏[1] 王宁[1] 刘祥贵[1] 

机构地区：[1]青岛科技大学高分子科学与工程学院.山东青岛266042

出　　处：《现代塑料加工应用》2014年第2期55-59,共5页Modern Plastics Processing and Applications

基　　金：国家自然科学基金项目(50973050;50273016;50573037)资助

摘　　要：根据对熔体挤出整体畸变和熔体破裂机理的分析,设计一系列方法减轻和消除畸变。采用原位成纤复合法和纤维流动取向效应改善无规共聚聚丙烯(PP-R)熔体在口模入口区的流动稳定性,消除环向次级流动,减轻螺纹畸变。添加一定质量的炭黑或白炭黑,利用炭黑形成三维网络结构改善溶聚丁苯橡胶(SSBR)的挤出畸变和熔体破裂行为。改变口模尺寸,适当增大口模长径比,有利于挤出过程稳定。flow orientation effects, the ring to secondary flow was eliminated,the screw thread-like dis- tortions of PP-R melts were overcome. The extrudate distortions and melt fractures of SSBR melts were weakened by a filling of carbon black or silica hydrated and a carbon black network was formed. Changing the size of die and the proper increasing of die L/D ratio were to the benefit of the stabilization of melt extrusion.

关 键 词：挤出 整体畸变熔体破裂 原位成纤复合炭黑网络 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]