等规聚丙烯的口模可拉性  

Drawability of Isotatic Polypropylene by Die Drawing

作　　者：曾佳[1] 刘义[1] 张鹏飞[1] 吴世见[1] 

机构地区：[1]四川大学高分子科学与工程学院,成都610065

出　　处：《工程塑料应用》2015年第11期35-38,共4页Engineering Plastics Application

摘　　要：采用口模拉伸技术成功制备了实际拉伸比达16以上的等规聚丙烯自增强线材,考察了拉伸温度、名义拉伸比、拉伸速度与实际拉伸比的相互关联性,获得了等规聚丙烯的口模拉伸特性。研究结果表明,提高拉伸温度或减小名义拉伸比,可拉伸速度均提高,对于名义拉伸比为3和5的口模,当拉伸温度分别提高至115℃和150℃时,拉伸速度可达到装置极限拉伸速度22 000 mm/min;实际拉伸比随名义拉伸比的提高而增大;当拉伸温度小于115℃时,实际拉伸比随拉伸速度的提高而增大,当拉伸温度达115℃以后,提高拉伸速度,实际拉伸比则增大到一定值后趋于稳定。Self-reinforced polypropylene wires with actual draw ratio of more than 16 were prepared by die drawing .The correlation of draw temperature, nominal draw ratio, draw speed and actual draw ratio were researched, which showed the drawability of isotatic polypropylene. The results show that maximal draw speed could be increased by decreasing nominal draw ratio or increasing draw temperature. For nominal draw ratio of 3 and 5 respectively, when draw temperature reach 115°C and 150°C respec- tively, the maximum draw speed 22 000 mm / min of the device could be obtained. The actual draw ratio of self-reinforced wires increase with increasing nominal draw ratio. When draw temperature is less than 115 %, actual draw ratio increase with increasing draw speed, after rising to the draw temperature, actual draw ratio increase with increasing draw speed firstly and tending to be stable later.

关 键 词：口模拉伸 可拉性 聚丙烯 自增强 

分 类 号：TQ327.9[化学工程—合成树脂塑料工业]