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Polymer-nanosheet Interfacial Behavior Revisited A Molecular Dynamics Study  
Polymer-nanosheet Interfacial Behavior Revisited A Molecular Dynamics Study
資料類型: PDF文件
關(guān)鍵詞: nanosheet  glassy  polymer  layer  lnterfacial  behavior  
資料大小: 100K
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:
Inthisstudy,wewilltendtosolvetheintriguingissueaboutwhetherthe"glassypolymerlayers"orcompletelyimmobilizedpolymerchainsexistaroundthefillerwhichisstillunsolved.AndnoconsistentconclusionhasbeenreachedabouttheinterfacialbehaviorofPNCs,whichimpelsustostudythepolymer-nanosheetsystems.Weuseabead-springmodelderivedfromtheonesuggestedbyKremerandGrest.Wefoundtheexistenceoftheoscillationinbead-densityprofilesnearthenanosheetsurface.Theinterfacialpolymerchainsareorientatinglyparalleltothesurface.Polymerchainsareelongatedandflattenedalongtheirellipsoidsclosetothesurface.Theglass-transitiontemperaturedecreasesforpurelyrepulsiveinteractionandincreasesforattractiveinteraction.Forthedynamicanalysisincludingspatialdistributionofthepopulationofbeads,interfacialbeadsexchangerate,desorptiondynamics,translationalandorientationmobility,thegradientofpolymerbeadsisexploredandthe"glassypolymerlayer"existsforstronglyattractiveinterfacialinteraction.Thethicknessoftheinterfaceisestimatedtobearound5a.Theformationof"glassybeadslayer"occurssuddenlywhenthepolymer-nanosheetinterfacialstrengthchangesfrom2.Oet05.Oe.Aqualitativemodelisproposedforthreedifferentinterfacialsystems.
作者: Y. Y. Gao, L. Q.Zhang , D. P. Cao
上傳時(shí)間: 2013-07-03 15:34:11
下載次數(shù): 1
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