高分子量聚对二氧环己酮结晶性能的研究

434Vol．43No．420117JOURNALOFSICHUANUNIVERSITYENGINEERINGSCIENCEEDITIONJuly20111009-3087201104-0232-041211121*11．6100412．322118DSCPOMXXRDpolyp－dioxanonePPDO。Mw＞30000g/molPPDOPPDOPPDOPPDO277300g/mol100℃。TQ323AResearchonCrystallizationBehaviourofPolyp－dioxanonewithHighMolecularWeightsBAOYi-hong12ZHANGTian-yao1CHENHe-chun1PangXiu-bing12BAIWei1*XIONGCheng-dong11．ChengduInst．ofOrganicChem．ChineseAcademyofSci．Chengdu610041China2．ZhejiangApeloaJianyuanBiomedicalMaterialsCo．ltdJinhua322118ChinaAbstractThecrystallinecharacteristicsofpolyp-dioxanonePPDOwithhighmolecularweightswasresearchedusingdifferentialscanningcalorimeterDSCpolarizedopticalmicroscopyPOMandX-RayDiffractionXRD．DSCcurvesofallsamplesrevealedthesamecrystallizationbehaviors．TheresultsshowedthatwhenthemolecularweightofPPDOreachesacertainlevelMw＞30000g/molitwillnotinfluenceboththecrystallizationbehaviorandtheglasstransitiontemperatureofPPDO．ThespheruliticgrowthrateofPPDOwithdifferentmolecularweightwasinvestigatedusingaPOM．PPDO－4Mw=277700g/molhadthehighestmolecularweightandthesmallestspheruliticgrowthrate．Theresultsconfirmedthatthehigherthemolecularweightandcrystallizationtemperaturethesmallerthespheruliticgrowthrate．KeywordsPPDOmolecularweightscrystallizationpolyp－dioxanonePPDO、1。、PPDO2PPDODSCPOMXRD2010－07－07“”1968－．．*[e-mail]－4Mw=277300g/molPPDO。11．1PPDO3Mark－Houwinkη=KMναα=0．69K=79×10－3cm3·g－144PPDO－1PPDO－2PPDO－3PPDO－434400、73500、108800277300g/mol。1．2DSCQ20TAinstruments。10℃/min－20℃140℃10℃/min－30℃10℃/min140℃。1．3POMXPN－203。150℃3minTc。1．4XXRDX’PertPhilipsXCoKαλ=0．17890nm15°45°3°/min。22．1PPDO1PPDODSC。1PPDODSCFig．1DSCheatingscancurvesofPPDOwithdifferentmolecularweights4PPDO－1PPDO－2PPDO－3PP-DO－432．7236．4339．0234．4J/gWunderlich5100%PP-DOΔHm014．4kJ/mol4。PPDOPPDO－1PPDO－2PPDO－3PPDO－4－9．89－10．41－9．96－9．99℃Tg。Mw＞30000g/molPPDO。2．2PPDO2PPDOPOM。2PPDO6070℃6。90℃7。PPDOPPDO。PPDOPPDO。PPDO。PPDO－4100℃400minPPDO－4。1PPDOTab．1Spheruliticgrowthrateasafunctionofcrystalliza-tiontemperaturefordifferentmolecularweightsPPDOG/μm·min－160℃70℃80℃90℃100℃PPDO－16．865．531．970．370．17PPDO－25．794．221．650．23PPDO－35．134．191．600．190．11PPDO－45．733．911．590．11－。。13324PPDO－1、PPDO－2、PPDO－3PPDO－460℃6．865．795．135．73μm/min90℃0．370．230．190．11μm/min。。90℃。aPPDO－1bPPDO－2cPPDO－3dPPDO－42PPDOFig．2POMpicturesofPPDOwithdifferentmolecularweight2．3PPDO34PPDOX。3PPDOXRDFig．3XRDcurvesofdifferentmolecularweightsPPDOPPDO2θ22°、24°28°d8。3PPDOPPDOMw＞30000g/molMv=277300g/mol100℃。43243PPDO。PPDO。1YangKKWangXLWangYZ．Polyp-dioxanoneanditscopolymersJ．JMacromolSciPolymRev2002C43373－398．2YangKKWangXLWangYZetal．Effectsofmolecularweightsofpolyp-dioxanoneonitsthermalrheologicalandmechanicalpropertiesandinvitrodegradabilityJ．MaterChemPhys200487218－221．3ChengHechunChengDongliangLiQingetal．ToughingofPolyDL-lactidebyblendingwithPolyp-dioxanoneJ．ChinPolymBull20071941－46．．DL－J．20071941－46．4BaiWZhangLFLiQetal．Invitrohydrolyticdegrada-tionofpolypara-dioxanone/polyDL-lactideblendsJ．MaterChemPhys201012279－86．5IshikiriyamaKPydaMZhangGetal．Heatcapacityofpo-ly-p-dioxanoneJ．JMacromolSciPhysB1998B3727－44．6PezzinAPTAlberdavanEkensteinGOPDuekEAR．Meltbehaviourcrystallinityandmorphologyofpolyp-diox-anoneJ．Polymer2001428303－8306．7SabinoMAFeijooJLMüllerAJ．Crystallisationandmor-phologyofneatanddegradationpolyp-dioxanoneJ．PolymDegradStab200173541－547．8KricheldorfHRDamrauDO．ZnL-lactate-catalyzedpoly-merizationof14－dioxan-2-oneJ．MacromolChemPhys19981991089－1097．23115BanerjeeSRobiPSSrinivasanAetal．Effectoftracead-ditionsofSnonmicrostructureandmechanicalpropertiesofAl-Cu-MgalloysJ．Materials＆Design20103184007－4015．16MurayamaMHoritaZHonoK．Microstructureoftwo-phaseAl-1．7at%Cualloydeformedbyequal-channelan-gularpressingJ．ActaMater200149121－29．17FerreiraILLinsJFCMoutinhoDJetal．NumericalandexperimentalinvestigationofmicroporosityformationinaternaryAl-Cu-SialloyJ．JournalofAlloysandCom-pounds2010503131－39．18EgizabalPdeCortazarMGDouinJetal．MicrostructuralanalysisofthereinforcedAl-Cu5mgti/Tib25wt%alloyforinvestmentcastingapplicationsJ．AdvancedEngineer-ingMaterials2010126504－508．19OkayasuMTakasuSYoshieS．Microstructureandmateri-alpropertiesofanAl-CualloyprovidedbytheOhnocontin-uouscastingtechniqueJ．JournalofMaterialsProcessingTechnology2010210111529－1535．20．4———M．2006159．21．M．199312－15．22．M．2005176－205．5324