殼聚糖及乙丙橡膠膜的輻射改性研究.pdf

1、中國(guó)科學(xué)技術(shù)大學(xué)博士學(xué)位論文殼聚糖及乙丙橡膠膜的輻射改性研究姓名：李夜平申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：高分子化學(xué)與物理指導(dǎo)教師：方月娥2002.12.1中嗣科學(xué)技術(shù)大學(xué)博士學(xué)位論文摘要ABSTRACTInthisdissemtion，na“嘲1p01ymerchitosaIlwasmodi矗edby60Co丫rayirradiationandplasmatechIliqueApan舶mtllese，syIlthcticpolymeretlly

2、lenepropylenerubber(EPR)membranewaSalsomodi丘edbyirradiationteclllliqueThefeaSibilityabouttllemodifiedEPRmembranesusedaSartificialkidneysemipemeablemembraIlehasbeenstudiedThemaincomentsarelistedasf01lows：23The1r—rayirradi

3、ationdegmdationofchitosanwassystematicallystudiedinsolidstatc，inswellingstate，aJldinaceticacidaqueoussolutionTheapparentactjVationenergy(E)，meaVefagecolIjsion矗equencyfactor(A)andIheGva】uesofchainscissionwereobtainedasfol

4、lows：insolidstateE=258kJ／Inol，A=70l10寸kGy1，G(20℃)=273；inswellingstaIe，E=203kJ／mol，A=29310‘5kGy一，G(19℃)=143；insolution，E=330kJ／m01，A=25210‘5kGy～，G(21℃)=736ItwaSthefirstreportaboutthepreparationoflowmoleculec11itosaIlby丫ra

5、yimdiationdegradationofswellingchitosan，whichgreatlyimproved也edeFadationefficiencyThehydrogelofchitosallp01y(sodi啪acrylate)wassynmesizedbyT—myirradiationtechniqueTheinnuencesofvariousfactorsonwateruptakehavebeenstudied，i

6、ncluding廿1emassratioofreactants，irradiationdose，doserateaIldtheconcentrationofN，N’一Methylenebisacryl踟ideetcThehydrogelwasofsensitiVitytothechangeofpHandionicstrengthThefjeezjng、vaterponionbecamemorea11dmorepredominantasw

7、ateruptakeofthehydrogeIgraduallyincreasedChitosanmembranesweregr世edw油hydroXyethylmethacrylate(HEMA)by丫rayirradiationtechIliqueTheinnuencesofseVeralfactorsonthedegree0fgraftinghavebeenstudiedThephysicochemicalpmpertiesofg

8、raftedmembraneswereinvestigatedTheworkestablishedmerelationshipofmei11itial釅堿ngrate(dG“t)withvariouse腩ctfactors：ln(dG0／dt)292l—1495廠r1091n【M】o058lnDThe印paremactivationenergy(E)and也eavemgecollision舶quencyfactor(A)ofme黟aft

9、ingcopolymerizationWere1243kJ，moland9955G％h042kGy。o58mol‘109L109Thepe蛐eabmtyofmemb鯽estourea，crcatinealldcreatininewasinveStigatedInaddition，EPRmembraIlesweregra船dwithHEMAby1r—rayirradiationtechIIiqueThefeasibilityabouttl