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The Influence of POSS on Photopolymerization Shrinkage , Photoreaction Behaviour of Polymer Kinetics and Photo-rheology Dispersed Liquid Crystals

資料類型：

PDF文件

關(guān)鍵詞：

Polymer dispersed liquid crystals Polyhedral oligomeric silsesquioxane
Volume shrinkage Photopolymerization Photo-rheology

資料大小：

108K

所屬學(xué)科：

分子表征

來源：

第六屆亞歐研討會(huì)上處理和性能增強(qiáng)聚合物會(huì)議文集（2013.6.2-6 武漢）

簡介：

Polymerdispersedliquidcrystals(PDLCs)havebeeninvestigatedintensivelybecauseoftheirinterestingpropertiesandpotentialapplicationsindisplayandelectro-opticaldevicescl].WhenpreparedPDLCsbyphotopolymerizationinducedphaseseparation(PIPS),thedecreaseinaveragedistancebetweenmonomersduringphotopolymerizationcausestheshrinkage.Theshrinkageinducedbyphotopolymerizationinfluencestheelectro-opticaI(E-O)propertiesofPDLCssignificantlyc2],andthusitisimportanttomeasureandcontroltheshrinkageaccurately.Inthiswork,polymerdispersedliquidcrystals(PDLCs)with0一10wt%methacrylisobutylpolyhedraloligomericsilsesquioxane(MI-POSS)werepreparedbyphotopolymerizationinducedphaseseparation.Photo-rheologytechniquewasusedtoinvestigatetheeffectofMI-POSSonthevolumeshrinkageofacrylate/liquidcrystalscomposites.TheeffectofMI-POSScontentonthephotoreactionkineticswascharacterizedbyPhoto-differentialscanningcalorimetry(P-DSC).Theseresultsshowedthatphoto-rheologytechniquewascapableofmeasuringphotopolymerizationvolumeshrinkageaccuratelyandeasilyonline,andtheresultsobtainedfromthismethodwerealmostsimilartotheseacquiredfromthedensitymethod,whilepossessingsmallersystematicerrors.MI-POSSreducedthephotopolymerizationvolumeshrinkagefor29%,howevertheconversionofdoublebondwasnotchangedwhenitscontentincreasedfromoto10wt%.

作者：

M. L. Ni , H. Y. Peng , X. P. Zhou, Z. G. Xue, X. L. Xie

上傳時(shí)間：

2013-07-04 14:47:11

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