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The Influence of POSS on Photopolymerization Shrinkage , Photoreaction Behaviour of Polymer Kinetics and Photo-rheology Dispersed Liquid Crystals  
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
所屬學科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強聚合物會議文集(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
上傳時間: 2013-07-04 14:47:11
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