PNIPAM高分子在甲醇水溶液中的溶解性及混致不溶現(xiàn)象的拉曼光譜研究.pdf

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文PNIPAM高分子在甲醇水溶液中的溶解性及混致不溶現(xiàn)象的拉曼光譜研究姓名：趙榮麗申請學(xué)位級別：碩士專業(yè)：化學(xué)物理指導(dǎo)教師：劉世林20090501ABSTRACTABSTRACTThethesisdealswiththestructureofmethanolaqueoususingthenoncoincidenceeffect(NCE)ofCOstretchingbandandisotopiceffectofC

2、D3ofmethanolinRamantechnologyFurtherusingtheNCEofCOstretchingbandofmethanolasaprobe，PNIPAM—solventinteractionsweregainedformthecomparisonofpoly(Nisopropylacrylamide)(PNIPAM)／methanol／watersolutionandisopropylacrylamide(N

3、IPPA)／methanoVwatersolutions，andthemechanismofcononsolvencyisillustratedThemainresultsareasfollows：1)TheconcentrationdependentofNCEandisotopiceffectinmethanol—watermix—tureshownthatthemethanol—watersystemisincompletelymi

4、xingatmoleculeslevelatmostconcentrationThemethanol—methanol—watertrimmerringswhichisformedthroughHBsexistintheregionaroundXCH30H=0302)At13DC，PNIPAMpreferentiallyabsorbswatermoleculesThepreferentialad—sorptionhererefertot

5、hatmorewaterinteractwithPNIPAMrelativetotheratioinmethan01aqueousThecooperativeinteractionbetweenPNIPAMsidechainsexistsinPNIPAMsystem，andthehydrophobicinteractionthatamongcloselylocatedsidechainsandmethylgroupsofmethanol

6、issignificantThiscooperativeinteractionsdamagethetrimmerringsthatinteractwithPNIPAMinthesolublestates3)TheabnormalpropertycononsolvencyissuggestedtObetheresultofthecooperativedesorptionofsolventsmoleculesandformationofst