摘要
根据炭黑(CB)粒子在聚合物中的选择性分布理论,通过工艺控制,使CB粒子主要分布在微纤表面。本工作将CB粒子首先与聚乙烯(PE)共混,再与聚对苯二甲酸乙二醇酯(PET)熔融混合-挤出-热拉伸-淬冷。形态观察表明,CB粒子可以良好地分布于PET微纤表面。电性能测试表明,分布于微纤表面的CB粒子有助于微纤之间的电子传导,该复合材料的正温度系数(PTC)较强,而负温度系数(N TC)较弱。
Based on the previous study of electrically conductive in-situ microfibrillar carbon black （CB）/poly （ethylene terephthalate） （PET）/polyethylene （PE） composite, the CB particles were selectively located in the surfaces of the microfibrils via controlling the blend morphology in this study. The CB particles were first mixed with PE matrix, and then the CB/PET composite and PET phase are melt extruded, hot stretched, and quenched. The morphological observation indicates that the CB particles are almost located on the surface of the microfibrils, which are thus benefit for the conduction of electrons between the microfibrils, and decrease greatly the resistance of the composite. It is interesting that this microfibrillar composite has a strong positive temperature coefficient（PTC）, but a weak negative temperature coefficient（NTC）.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第5期201-204,共4页
Polymer Materials Science & Engineering
基金
四川省杰出青年学科带头人基金(04ZQ026-037)
国家自然科学基金(50103007)项目
