Time-dependent Uniaxial Piezoresistive Behavior of High-density Polyethylene / Short Carbon Fiber Conductive Composites，2005年新型纤维与聚合物材料国际学术会议（10.19-10.21，上海）-中国聚合物网,论文下载

Time-dependent Uniaxial Piezoresistive Behavior of High-density Polyethylene / Short Carbon Fiber Conductive Composites

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High-density Polyethylene / Short Carbon Fiber Conductive
Composites

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所属学科：

分子表征

来源：

2005年新型纤维与聚合物材料国际学术会议（10.19-10.21，上海）

简介：

Shortcarbonfibers(SCF)filledhigh-densitypolyethylene(HDPE)conductivecompositeswerestudiedintermsoftime-dependentpiezoresistivebehaviors.Thetime-dependentchangeofresistanceunderconstantstressorstrainwasfoundtobethesuccessionofthepreviouspressure-dependentpiezoresistance.Dependingonthefillervolumefractionandtheleveloftheconstantstressorstrain,resistancecreepandresistancerelaxationwithdifferentdirectionswereobserved.AnempiricalexpressionsimilartotheBurgersequationcouldbeappliedtofitthedataforboththeresistancecreepandtheresistancerelaxation.Thefittedrelaxationtimeasafunctionofpressureshowedthatthereexisttwocompetingprocessescontrollingthepiezoresistivebehavioranditstimedependence.Mechanicalcreepandstressrelaxationofthecompositeswerealsostudied,andacomparisonwiththetime-dependentresistanceimpliedthatthereisaconductingpercolationnetworkwhichisattributedtothephysicalcontactsbetweenSCFandamechanicalnetworkformedbythemolecularentanglementorphysicalcross-linkingofthepolymermatrixandtheinteractionbetweenthefillerandthematrix.Itisbelievedthatthetwonetworksdominatetheelectricalandthemechanicalbehaviors,respectively.

作者：

Q. Zheng J. F. Zhou Y.H. Song

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2007-08-07 14:24:19

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xiaoshitang 2010-01-27 13:28:59

谢谢！！！！！

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