玻璃化转变温度测定仪

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1、熱分析技術簡介(DSC,TGA&DMA)PerkinElmerThermalSpecialist康瑜容TiffanyKangTiffany.Kang@perkinelmer.comDifferentialScanningCalorimetry(DSC)ThermogravimetricAnalysis(TGA)ThermomechanicalAnalysis(TMA)DynamicMechanicalAnalysis(DMA)常用的熱分析方法Page2常用的熱分析方法DSCHeatflowvs.TempTm,Tc,TgDH,curingtime,curingdegreeRea

2、ctionrate,kineticsTGAWeightLossvs.Temp-Decompositiontemperature%WtpercentageOxidativetimeTMADimensionalChangevs.TempCTE(a1,a2)TgSofteningpointDMAViscoelasticpropertyvs.TempStorage/Loss/ComplexModulus(E’,E”,E*)tandViscosityandmastercurvePage3高分子材料結構TypeofPolymerChainStructureTypeStructureExa

3、mpleLinearBranchedshortchainLongchainbranchingLadderPoly(vinylchloride),PolystyrenePolypropylenePolypropylenePoly(imidazolpyrrolones)Page4高分子材料結構TypeofPolymerChainStructure(Continued)TypeStructureExampleStarNetworkInterpenetratingnetwork(IPN)Phenol-formaldehyderesinsTwocrosslinkedpolymersno

4、tbondedtoeachotherCrosslinkedepoxywithvinylpolymerPage5高分子材料的分類PolystryenePolycarbonatePolyurethanesPolysulfoneAmorphousLOW/MEDIUMNylonPETAcetalHIGHPPSPPHDPECrystallineThermoplastics(Nochemicalchangeonheating)EpoxiesPolyimidesPolyestersPhenolicsUncuredRubberSiliconesNeopreneEpoxyCuredThermo

5、sets(Chemicalchangeonheating)PolymersPage6Amorphousvs.Crystalline?AmorphousThermoplasticCrystallinePolymerPage7Semi-CrystallinePolymerSemi-CrystallinePolymerSemi-crystallinepolymerscontainbothamorphousANDcrystallinephasesPropertiesdominatedbybothTgandTmSemi-crystallinepolymerscanexhibitaddi

6、tionalcrystallizationduringheatingPage8ThermosettingPolymerPage9SchematicResultsinThermalAnalysisQualityofsampleprocessDSC(Ex)TGATMADMACrystallineSemi-crystalline-Amorphous-Semi-crystalline-General-Liquid-Unspecific-SolidMeltingRecrystallizationSublimationSolid-solidtransitionGlasstransiti

7、onSofteningwithoutTgPost-crosslinkingDecompositionLigandreleaseEvaporationChemicalreactionsDeterminationof%Page10DSCTechniqueDifferentialScanningCalorimetryQuestion?PE分成HDPE,LLDPE及LDPE-結構有何不同?-性質有何差異?-結構和性質有何關聯性?結晶的過程為何?加工條件對結晶有何影響?結晶度對透明度的影響?添加劑的影響?DSC可