Positive temperature coefficient effect of epoxy resin filled with short carbon fibers

被引：42

作者：

Chekanov, Y

Ohnogi, R

Asai, S

Sumita, M

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

[2] Russian Acad Sci, Inst Chem Phys, Chernogolovka 142432, Moscow Region, Russia

来源：

POLYMER JOURNAL | 1998年 / 30卷 / 05期

关键词：

epoxy resin; positive temperature coefficient; carbon fibers; electrical resistivity; percolation;

D O I：

10.1295/polymj.30.381

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A phenomenon of positive temperature coefficient (PTC) of electrical resistivity has been studied for an epoxy resin filled with carbon fibers (CF). An upper limit temperature of the PTC region was found to depend strongly on CF content. The greater CF content is, the higher upper limit temperature of PTC region is observed. A phenomenological model was proposed to explain the PTC effect. Cure temperature was shown to have a great influence on upper limit temperature of PTC region and resistivity value at room temperature. The current-voltage characteristics of the composites are not Ohmic in high-voltage range, implying non-graphitic mechanism of conduction. Tunneling mechanism of the conduction is supposed.

引用

页码：381 / 387

页数：7

共 28 条

[1] ELECTRICAL AND THERMAL-CONDUCTIVITIES OF POLYETHYLENE COMPOSITES FILLED WITH BIAXIAL ORIENTED SHORT-CUT CARBON-FIBERS [J].