 Wysłany: Nie 10:58, 13 Lut 2011 Temat postu: Tory Burch Shoes Styrene methyl methacrylate and |
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| Styrene / methyl methacrylate and styrene / methyl acrylate (β-hydroxy ester) block copolymer on the surface moving
HESURFACE0F0CKC0PoLYMERPANJiayu,Tory Burch Shoes, LUYingxian,tory burch outlet, DENGZhuo, QiuKunyuan (Departm ~ ztofPolymer & ... andEngineering.CCh ~ istryandMolecularEngin ~ ring.PekingUniversity.Beiiing100871) AbstractThereorientationofsegmentsonthecopolymersurfacewithchangeofimmersionmediumhavebeeninvestigatedbydynamiccob_tactangle (DCA) measurements. ThesamplesareamphiphiliccopolymerPS-b ・ rPMAAorPS-b ・ rPHPMApreparedbypolymerizedMAAorHPMAmonomerwithpolystyrenemacroinitiatforcontainingazogroup. Theresultsshowthatthereorientationofpolarsegments (PMAAorPHPMAsegments) onthesurfacecontributetothecontactanglehysteresis. TherecedingangleisverysensityvetopolarityandmobilityofthesegmentsoncopolymersurfacewhileadvancingangleremainsatanapproximatevalueforthesamplesonwhichsurfacePSsegmentenrichmenttookplace,moncler jackets, sotheAO, adifferencebetweenadvancingangleandrecedingangle, canbeusedasanindicationofreorientationabilityofsegmentsand / orgroupsonthecopolymersurfaceThevaluesofadvancingangleorofrecedinganglemeasuredinthesecondimmersioncyclearesameasthatinthefirst, respectively,moncler outlet, thisrevealsthatthereorientationofsegmentsand / orgroupsarereversiblewiththeenvironmentalchangeinthecaseofbothPS-b-PMAAandPS-b-PHPMA. Theresultsalsoshowthatthecontactanglehysteresisdependontemperatureofmedium, ie. , Thevaluesofboth0andAOdecreasewithincreasingoftemperature, andthatdynamicbehavioroftheamphiphiliccopolymerscanbeaffectbytherratioofsequencelength (MPS / MPMAAorMPs / MMA) inthemacromolecularchain. KeywordsAlnphiphiliccopolymer, Dynamiccontactangle, ReorientationofsegmentsoilSErface More articles related to topics： Yield of wheat seed coating agent of _3078 ralph lauren outlet PEG as a pore-forming agents o Tory Burch Shoes Four cases of shoots finishing _9 |
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