聚丙烯-凹凸棒石納米復合材料的制備及表征.pdf

1、武漢理工大學碩士學位論文聚丙烯凹凸棒石納米復合材料的制備及表征姓名：李麗坤申請學位級別：碩士專業(yè)：材料學指導教師：官建國馬永梅20080401武漢理工大學碩士學位論文AbstractThedevelopmentandstatusofthemodificationofpolypropene(PP)havebeenreviewedinthispaperThemainpurposeofthisworkisfocusedonpreparingc

2、ompositeswithbetterperformanceviablendingPPwithAttapulgite(ATP)，studyingtherelationshipbetweenstructureandPropertiesWeusedthemethodofSolution—CompoundandMelt—BlendingtopreparethePP／ATPcompositeATPwaspretreatedinthreediff

3、erentways：modifiedbysilanecouplingagentblending、析tllirregularpolypropylene，envelopedbyPolyethyleneoxideThenanocompositepreparedbypreenvelopingofPolyethyleneoxidegivesthehighestmechanicalpropertiesScanelectronmicroscope(S

4、EM)resultsrevealthatThediameteroftreatedATPunithavenoobviouschange，Thelengthto—diameterfactorhasalitterreducedthespecificsurfaceareatumedsmallobviouslybytestofBETandthemostofmesoporedissapeerdeThepropertiesofthecomposite

5、of3wt％ATPcontentwerecompared、杭t11thoseofpurePPTheimpactstrengthofthecompositeWasincreasedby83％，andthetensilestrengthandflexuralstrengthWasincreasedby6～11％and33～45％respectivelyScanelectronmicroscope(SEM)resultsrevealthatA

6、TPdisperseshomogeneouslyinthePPmatrixandmainlyexistsasanomocyticcrystalbundlesThediameteroftreatedATPunitisintherangeof20～40nnlXraydiffraction(XRD)showsthatPPwaskeptasaPPcrystallineinthecomposition，andnocrystallinephaset

7、ransitionOCCurSasreportedinliteratureATPspretreatedbysilanecouplingagentandirregularpolypropyleneshowobviousgrainrefinementwhileATPpretreatedbyPolyethyleneoxidedoesnotshowsucheffectDynamicmechanicalanalysisandtheresultso

8、fdifferentialscanningcalorimetry(DSC)reflectthattheadditionofATPCanincreasethecrystallizationtemperatureandcrystallizationofPP／ATPTheadditionofATPgivesnucleationeffectandATPpretreatedbyPolyethyleneoxideshowsthebesteffect