Preparation and Unusual Temperature-Resistivity Effect of iPP/HDPE/CB Composites

被引：0
|
作者：
Gao Yong-Juan [1 ]
Liu Zheng-Ying [1 ]
Yin Chao-Lu [1 ]
Huang Shi-Lin [1 ]
Yang Ming-Bo [1 ]
机构：
[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China
来源：
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2011年 / 32卷 / 02期
关键词：
iPP/HDPE/CB composite; Injection molding; Compression molding; PTC effect; POLYMER BLENDS; CARBON-BLACK; COEFFICIENT;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
iPP/HDPE/CB (mass ratio 70:30:4) composites were prepared by injection molding and compression molding. The room-temperature volume resistivity of iPP/HDPE/CB composites had a little change after a heating-cooling run and the injection molded and compressed samples had unusual and different positive temperature coefficient (PTC) effects under the varying of temperature. The injection molded sample had two little PTC at 130 degrees C (around HDPE melting point) and 175 degrees C (above iPP melting point), but the compressed sample showed one PTC effect near 136 degrees C and the second PTC effect didn ' t appear at the higher temperature. Compared with the compressed samples, the breaking up of conductive network was easier in the injection molded sample. These findings could help us to understand the PTC effect and establish the conductive composites with stable electrical property even if experiencing high temperature.
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页码：207 / 209
页数：3
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