文献类型：期刊文献

中文题名：等通道转角挤压对等规聚丙烯性能的影响

英文题名：Influence of Equal Channel Angular Extrusion on Properties of Isotactic Polypropylene

作者：葛小言[1];王婷兰[1];唐颂超[1]

机构：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份：2008

卷号：20

期号：2

起止页码：45

中文期刊名：现代塑料加工应用

外文期刊名：Modern Plastics Processing and Applications

收录：CSTPCD;;北大核心:【北大核心2004】；

语种：中文

中文关键词：等通道转角挤压;等规聚丙烯;挤压温度;结晶结构;力学性能

外文关键词：equal channel angular extrusion; isotactic polypropylene; extrusion temperature; crystalline structure; mechanical properties

摘要：在25mm/min的挤压速度及25～105℃的挤压温度,了等通道转角挤压(ECAE)对等规聚丙烯(iPP)结晶结构和力学性能的影响。结果表明,ECAE可以细化iPP晶粒,并可使细化的晶粒发生取向I随着挤压温度的升高,iPP的拉伸强度、冲击强度、弯曲强度、弯曲模量逐渐增加,断裂伸长率逐渐降低;iPP在105℃挤压后.其拉伸强度、断裂伸长率、冲击强度和弯曲模量分别比ECAE前提高了38%,700%,750%,33%。
At the extrusion temperature from 25 ℃to 105℃ and extrusion speed of 25 mm/min,the experiments were conducted to evaluate the influence of equal channel angular extrusion （ECAE） on the crystalline structure and mechanical properties of isotactic polypropylene （iPP）. The results show that the grain of iPP can be refined and orientated by ECAE, tensile strength, impact strength, flexural strength and flexural modulus of iPP are gradually increased with the increase of extrusion temperature, elongation at break of iPP is reduced. After iPP is processed with ECAE at the extrusion temperature of 105℃ ,the tensile strength, elongation at break, impact strength and flexural modulus are 38%, 700%, 750% and 33% higher than those of iPP before ECAE, respectively.