采用普通挤出设备,在机头内,于单向拉伸应力场中实现了聚丙烯片材的双向自增强,纵向拉伸强度提高了6.33倍,横向拉伸强度提高了近1倍.同时纵横向拉伸强度表现出同步增长的趋势,其值随机头收敛角的不同而变化.运用SEM、DSC等测试手段对微观结构进行表征,揭示出试样内形成了串晶啮合结构,阐述了该结构与性能之间的关系.
参考文献
[1] | 申开智,姜朝东,李效玉,方八军,陈利民.几种采用熔体注射成型实现聚合物自增强的方法[J].高分子通报,2000(03):1-7. |
[2] | Jiang L.;Ji JL.;Guan Q.;Shen KZ. .A mandrel-rotating die to produce high-hoop-strength HDPE pipe by self-reinforcement[J].Journal of Applied Polymer Science,1998(2):323-328. |
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