Shape Memory Characteristics of Epoxy Resin-based Composites，第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）-中国聚合物网,论文下载

Shape Memory Characteristics of Epoxy Resin-based Composites

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shape memory epoxy composites

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所属学科：

分子表征

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第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）

简介：

Ashapememorypolymer(SMP)isanactivelymovingpolymer,whichrecoversitsoriginalshapefromapreviouslyprogrammed,temporaryshapeuponanexternalstimulus.Thetemporaryshapecanbeachievedbymechanicalloadinginpresenceoftheexternalstimulusandfixedbyremovingorchangingthisstimulusthatisusuallythetemperature.Theshapememoryeffectisinducedwhenthematerialreachesacriticaltemperature,calledtransformationtemperature(TUam).Thisagreeswiththeglasstransitiontemperature(Tg)forcrosslinkedthermosets,suchasepoxyresins(EP).SMPsmayhavemanyadvantages,suchaseasyprocessability,lowcost,lightweight,largedeformability,biocompatibility,biodegradability,etc.comparedwithshapememoryalloys.However,SMPshavesomelimitations,fromwhichlowrecoverystressisthemostimportantproblemwithrespecttopotentialapplications.IncreasingthelowrecoverystressofSMPsisinthefocusofresearchinterestnowadays.TheshapememorycharacteristicsofEPcompositescontainingdifferentreinforcements(coveringbothnano-scaledandmicron-scaledversions)wereassessedinthreepointbendingmodeinadynamic-mechanicalanalysisdeviceandcomparedtothoseoftheparentEP.Fromunconstrainedtests,theshapefixityandrecoveryratiosandtherecoveryrate,whereasfromconstrainedteststherecoverystressweredetermined.Effectsoftype,amountandpositioningofthereinforcementsontheshapememorycharacteristicsoftheEPcompositesweresummarizedandguidelinesfortheirfurtherdevelopmentwereoutlined.

作者：

J.Karger-Kocsis

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2013-06-21 11:55:06

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