cnts诱导pvdf%2fpmma相容共混物结晶与相分离的研究

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1、万方数据西南交通大学硕士研究生学位论文第1II页扩散吸附在CNTs表面，即不利于CNTs诱导相容共混物中发生液．液相分离，因而不利于CNTs促进共混物中PVDF的结晶。关键词：碳纳米管；PVDF／PMMA相容共混物；结晶；相分离；分子量万方数据西南交通大学硕士研究生学位论文第Ⅳ页AbstractPolymerblendingisthesimplestandmostpracticalmethodtoobtainnewhigh—performancepolymermaterials．It’Sfeas

2、ibletocontrolthemicrostructureandthusregulatingthemacro-propertiesofblendmaterialsthroughtuningthemiscibilityandphaseseparationprocessofthecomponents．Amongdifferentkindsofpolymerblends，thereisakindofblendthatismiscibleinthemeltstatewhilephase—separat

3、edinthesolidstateduetotheoccurrenceofcrystallizationofonecomponent．Thecrystallizationandphaseseparationofmisciblepolymerblendsduringthesolidificationprocesscanbeinfluencedbymanyfactors，includingcomposition，interactionsbetweenthecomponentsandmolecular

4、weightsofeachcomponent．Recentl5ithasbeenproventhataddingnanoparticlesintosuchblendsalsoinfluencesthephaseseparationand／orcrystallizationprocesses．Theeffectsofnanoparticlesoncrystallizationandphaseseparationarecloselyrelatedtotheshape，dimension，typeso

5、ffunctionalgroupsonthesurfaceandotherpropertiesofthenanopariticles．Carbonnanotubes(CNTs)aretypicalone—dimensionalnanofillerswhichhaveattractedmuchattentionofresearchers．Becauseofthelargeaspectratioandsurfacearea，aswellasthesimilarchainconformationcha

6、racteristictothatofpolymer,CNTsexhibitstrongaffinitytomanykindsofpolymers．ItCanbeexpectedthatCNTshaveainfluenceonthecrystallizationandphaseseparationwhenintroducedintotheabovementionedmiscibleblend．ItismeaningfultoinvestigatetheeffectsofCNTsinsuchkin

7、dofmiscibleblendfrombothaperspectiveofacademicresearchandindustrialproduction．ThepresentthesisisfocusedoninvestigatingtheinfluencingmechanismofCNTsonpoly(vinylidenefluoride)(PVDF)／poly(methylmethacrylate)(PMMA)miscibleblend．CarboxylfunctinanlizedCNTs

8、wereintroducedintoPVDF／PMMAmiscibleblendtopreparethetemarynanocomposites．ThedispersionstatesandthemicrostructuresofCNTswerefirstlycharacterized．Thenonisothermalandisothermalcrystallizationbehaviorsofthebinaryblendsandtheternarynanocompositesweresyste