Journal Published Online: 22 December 2016
Volume 45, Issue 1

Piezoresistive Characterization of Polyethylene Terephthalate–Graphite Composite

CODEN: JTEVAB

Abstract

This study investigated the mechanical properties as well as electrical resistivity and piezoresistivity of the polyethylene terephthalate (PET)–graphite composite. The effects of graphite content, loading type, and loading rate on the performance of PET–graphite composite were investigated. Test results showed that the compressive and flexural strengths of the composite decreased rapidly as the graphite content was beyond 12 %. The electrical resistivity of the composite decreased from 3.5 × 108 Ω · cm to 2.2 × 103 Ω · cm as the graphite contents increased from 8 % to 12 %. The graphite content for the conductive percolation threshold of the PET–graphite composite was determined to be 13 %. The PET–graphite composite was sensitive to low compressive stress. When the compressive stress reached 0.7 MPa, the fractional change in the resistivity could reach 10.5 %. The piezoresistivity of the PET–graphite composite was significantly influenced by the loading rates. The field test indicated that the composite was able to detect the traffic effectively.

Author Information

Zhang, X.
School of Civil Engineering, Shandong Univ., Jinan, Shandong, CN
Yao, Z.
School of Civil Engineering, Shandong Univ., Jinan, Shandong, CN
Ge, Z.
School of Civil Engineering, Shandong Univ., Jinan, Shandong, CN
Yao, K.
Dept. of Civil and Environmental Engineering, National Univ. of Singapore, 21 Lower Kent Ridge Road, SG
Tao, R.
School of Civil Engineering, Shandong Univ., Jinan, Shandong, CN
Yu, T.
School of Civil Engineering, Shandong Univ., Jinan, Shandong, CN
Han, J.
China Ry. Siyuan Survey and Design Group Co., LTD., Wuhan, Hubei, CN
Pages: 10
Price: $25.00
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Stock #: JTE20160026
ISSN: 0090-3973
DOI: 10.1520/JTE20160026