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A preliminary study on mechanical‐electrical behavior of graphite powder‐filled high‐density polyethylene composites
Author(s) -
Yi XiaoSu,
Song YiHiu,
Zheng Qiang
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(20000725)77:4<792::aid-app11>3.0.co;2-6
Subject(s) - composite material , materials science , compression (physics) , graphite , creep , polyethylene , electrical resistance and conductance , compression molding , mold
Mechanical and electrical responses of graphite powder (GP)‐filled high‐density polyethylene composites to a uniaxial compression–decompression cycle were studied. Above a compression loading level, a large positive‐pressure coefficient effect of resistance was observed, for which a slide mechanism of GP in the matrix is believed to be responsible. In a step‐wise compressive loading and loading‐holding experiment, the critical compression level was also found, at which the resistance response changed from a time‐independent one to a time‐dependent, creep‐like one. The current‐voltage behavior of the composites showed that the GP contact was non‐ohmic, regardless of GP contents and pressure levels. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 792–796, 2000