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.
出处
《现代塑料加工应用》
CAS
北大核心
2008年第2期45-48,共4页
Modern Plastics Processing and Applications
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
equal channel angular extrusion
isotactic polypropylene
extrusion temperature
crystalline structure
mechanical properties
