iPP/HDPE/CB复合材料制备及反常的温度-电阻效应

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (2): 207.

iPP/HDPE/CB复合材料制备及反常的温度-电阻效应

郜永娟, 刘正英, 尹朝露, 黄世琳, 杨鸣波

四川大学高分子科学与工程学院, 高分子材料工程国家重点实验室, 成都 610065

收稿日期:2010-11-01 修回日期:2010-12-28 出版日期:2010-02-10 发布日期:2011-02-23
通讯作者: 杨鸣波 E-mail:yangmb@scu.edu.cn
基金资助:
国家自然科学基金(批准号: 2005CB623808)资助.

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.

摘要/Abstract

摘要： 本文利用普通熔融挤出法制备了iPP/HDPE/CB复合材料, 分别采用注射成型及压制成型方法得到测试试样. 通过研究复合材料体积电阻率随温度的变化, 考察注塑试样和压制试样的PTC特性及复合材料形态结构与试样PTC特性之间的关系.

关键词: iPP/HDPE/CB复合材料, 注塑成型, 压制成型, PTC效应

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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郜永娟刘正英尹朝露黄世琳杨鸣波. iPP/HDPE/CB复合材料制备及反常的温度-电阻效应. 高等学校化学学报, 2011, 32(2): 207.

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