MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Bending Stress Dependent Electrical Resistivity of Carbon Fiber in Polymer for Health Monitoring System
Yoshitake NishiMitsuru Hirano
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2007 Volume 48 Issue 10 Pages 2735-2738

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Abstract

Influences of compressive and tensile stresses on an electrical resistivity of carbon fiber in polyvinyl acetate polymer on bending test are studied as a basic research to develop high sensitive stress sensors. It is confirmed that a compressive stress of less than 0.3 GPa on bending test reversibly decreases the electrical resistivity of carbon fiber due to enhancement of the density of state of π bonding electron. A tensile stress of less than 0.3 GPa on bending test also decreases the electrical resistivity of carbon fiber, reversibly, because of decreasing the density of electron scattering sites.

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© 2007 The Japan Institute of Metals and Materials
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