详细信息
文献类型:期刊文献
中文题名:炭黑填充聚乙烯材料电阻-温度特性研究
英文题名:The Study on the R~T Characteristic of CB/PE Composites
作者:史宇正[1];方斌[1];杨钧[1];陈宁平[1];王庚超[1]
机构:[1]华东理工大学材料科学研究所
年份:1998
卷号:11
期号:1
起止页码:55
中文期刊名:功能高分子学报
外文期刊名:Journal of Functional Polymers
收录:CSTPCD;;CSCD:【CSCD2011_2012】;
语种:中文
中文关键词:炭黑;聚乙烯;导电材料;电阻特性;复合材料;PTC
外文关键词:Carbon black, Polyethylene, PTC, Electrical material
摘要:研究了炭黑/聚乙烯导电复合材料的PTC特性及在不同条件下的电阻变化。发现PTC特性与体积膨胀及聚乙烯晶相的熔融有许多一致性。认为材料的体积膨胀及聚乙烯晶相熔融时炭黑颗粒均匀化扩散导致了电阻随温度上升。在较高温度下,炭黑颗粒在分子链段热运动的推动下会发生相对聚集使电阻不断减小,这是材料出现NTC现象的原因。材料总的电阻温度特性是体积膨胀、炭黑向聚乙烯熔融区扩散及相互聚集三个因素共同作用的结果。
The electrical properties of CB/PE composites were studied. Experiments showed that the volume expansion and the diffusion of CB particles from amorphous region to melt region in composites caused the increase of resistance, while the coagulation of CB particles caused by the thermal motion of polymer chain segments led to the decrease of resistance. The relationship between resistivity & temperature of CB/PE composites were dominated by the above three factors.
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