多组分高分子材料(5)

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1、1.BasicConceptsI.I.FundamentalRelationships2.Modelingtoday3.FractureBehavior4.BasicPrinciplesandInstruments4.BasicPrinciplesandInstrumentsII.II.PolymerSurfaces5.PolymerChainsatSurfacesand5.PolymerChainsatSurfacesandandInterfacesInterfaces6.StrengtheningtheInterface6.StrengtheningtheInterface7

2、.SurfacesofAdvancedandComposite7.SurfacesofAdvancedandCompositeSystems8.RubberTougheningofEngineeringRubberTougheningofEngineeringPlasticsPlasticsIII.III.TypicalEngineering9.BlockCopolymersandThermoplastic9.BlockCopolymersandThermoplasticPolymerMaterialsElastomersElastomers10.Interpenetrating

3、PolymerNetworks(IPNs)IV.IV.RheologyRheologyinMultiphase11.DispersedmultiphaseflowDispersedmultiphaseflowPolymers12.StratifiedmultiphaseflowV.V.Nano-StructuralPolymerMaterials4.3CharacterizationofPolymerSurfacesandInterfaces2¢HighHigh--energysurfacesenergysurfaces:metals,metaloxides,silica,dia

4、monde.g.,Hg:486.8mN/m¢LowLow--energysurfacesenergysurfaces:mostorganiccompoundandpolymerse.g.,PS:40.7mN/m¢Thelow-energysurfacematerialstendtoadsorbstronglyontothehigh-energysurfacematerials,greatlydecreasingthesurfaceenergyofthesystem.ContactAngleMethodsandSurfaceTensionTomeasurethewettabilit

5、yofasurface.SaturatedvaporContactangleLiquidSolidθ<90Young’sequation:°indicatethattheliquidwetsthesolidspontaneously.γSV=γSL+γLVcosθContactanglesabove90Advancingcontactangle°indicatethattheliquiddoesθanotwetthesolid.Recedingcontactangelθr4OtherMethodstoAnalyzePolymerSurface¢Electronspectrosco

6、pyforchemicalanalysis(ESCA)orX-rayphotoelectronspectroscopy(XPS)tomeasuretheelectronbindingenergiesofthevariouselementswith5nmorsoatmaterialsurfaces.¢Scanningtunnelingmicroscopy(STM)¢Atomicforcemicroscopy(AFM)564nm,126nmGelatin/PCLcompositenanofibersTEMimagesofcore-shellPurestructuredgelatin/

7、PCLbi-gelatincomponentnanofibersnanofibersZhangYZ,etal.Chem.Mat.XPSsurveyspectra2004,16(18):3406-3409MeasurementsofInterfaceTensionInteriorPolymerInterfacesForpolymerblendsandcomposites:Theinterfacebetweenfillersorreinforcingagentsandpolymers