PE/CB复合材料的辐照效应

PE/CB Composites with PTC Properties were Made by γ-Rays Irradiation

摘要: 研究了两种炭黑(CB)对PE的影响及PTC功能材料挤出后的特性，发现挤出后粒子和聚合物取向对材料电性能都有较大影响。经γ射线辐照后HDPE／CB功能复合材料稳定性大为提高，初步探讨了辐射对PTC功能材料稳定性的影响。结合辐射交联等方法提高材料的稳定性。用扫描电镜(SEM)观测了一系列PE／CB的形态、CB的分布、链段的分子运动，并结合Fisher的toy model对PE／CB机制做了较系统的解释。

Abstract: High-density-polyethylene(HDPE) and low-density-polyethylene(LDPE) were used as the polymer matrices. Two kinds of carbon blacks ( CB) , high structure and low structure were used as the conductive filler. The positive temperature coefficient (PTC) intens