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

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (2): 207.

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

GAO Yong-Juan, LIU Zheng-Ying, YIN Chao-Lu, HUANG Shi-Lin, YANG Ming-Bo*

State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China

Received:2010-11-01 Revised:2010-12-28 Online:2010-02-10 Published:2011-02-23
Contact: YANG Ming-Bo E-mail:yangmb@scu.edu.cn
Supported by:
国家自然科学基金(批准号: 2005CB623808)资助.

Abstract

Abstract: 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 ℃(around HDPE melting point) and 175 ℃(above iPP melting point), but the compressed sample showed one PTC effect near 136 ℃ 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.

Key words: iPP/HDPE/CB composites, Injection molding, Compression molding, PTC effect

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GAO Yong-Juan, LIU Zheng-Ying, YIN Chao-Lu, HUANG Shi-Lin, YANG Ming-Bo*. Preparation and Unusual Temperature-Resistivity Effect of iPP/HDPE/CB Composites[J]. Chem. J. Chinese Universities, 2011, 32(2): 207.

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

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