原位成纤复合法改善PP-R的挤出螺纹畸变  

Improvement of Helix Distortions of PP-R Extrudates With In-Situ Fibrillation Method

作　　者：张昊[1] 王占杰[1] 刘祥贵[1] 孙显茹[1] 吴其晔[1] 

机构地区：[1]青岛科技大学教育部橡塑材料与工程重点实验室,山东青岛266042

出　　处：《现代塑料加工应用》2011年第2期1-4,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金资助项目(50973035;50573037)

摘　　要：研究了聚丙烯熔体挤出螺纹畸变产生的机理,采用原位成纤复合法制备无规共聚聚丙烯(PP-R)/聚对苯二甲酸乙二醇酯(PET)复合材料来改善PP-R的挤出性能。结果表明:口模入口区的环向次级流动是PP-R熔体产生螺纹畸变的主要原因;采用"挤出-热拉伸-淬冷"工艺制得的复合样品中PET以微纤状分散于PP-R基体中,有效地推迟了PP-R熔体挤出螺纹畸变的发生。The mechanisms of the helix distortions occurred during PP-R melts extrusion were studied. The PP-R/PET composites made by in-situ fibrillation were used to improve the performance of PP-R extrudates. The results show that the helix distortions of PP-R extrudates are resulted from the annular secondary flow at the entrance of die. In the composites made by extrusion-tretching-quenching technique, the PET microfiber is dispersed in the PP-R matrixes. The occurrence of the helix distortions of PP-R extrudates is effectively detained.

关 键 词：聚丙烯 聚对苯二甲酸乙二醇酯 复合材料螺纹畸变原位成纤 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]