cnts诱导pvdf2fpmma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’Sfeasibletocontrolthemicrostructureandthusregulatingt

2、hemacro-propertiesofblendmaterialsthroughtuningthemiscibilityandphaseseparationprocessofthecomponents．Amongdifferentkindsofpolymerblends，thereisakindofblendthatismiscibleinthemeltstatewhilephase—separatedinthesolidstateduetotheoccurrenceofcrystallizationofonecomponent．Thecrystallizationandphasesep

3、arationofmisciblepolymerblendsduringthesolidificationprocesscanbeinfluencedbymanyfactors，includingcomposition，interactionsbetweenthecomponentsandmolecularweightsofeachcomponent．Recentl5ithasbeenproventhataddingnanoparticlesintosuchblendsalsoinfluencesthephaseseparationand／orcrystallizationprocesse

4、s．Theeffectsofnanoparticlesoncrystallizationandphaseseparationarecloselyrelatedtotheshape，dimension，typesoffunctionalgroupsonthesurfaceandotherpropertiesofthenanopariticles．Carbonnanotubes(CNTs)aretypicalone—dimensionalnanofillerswhichhaveattractedmuchattentionofresearchers．Becauseofthelargeaspect

5、ratioandsurfacearea，aswellasthesimilarchainconformationcharacteristictothatofpolymer,CNTsexhibitstrongaffinitytomanykindsofpolymers．ItCanbeexpectedthatCNTshaveainfluenceonthecrystallizationandphaseseparationwhenintroducedintotheabovementionedmiscibleblend．ItismeaningfultoinvestigatetheeffectsofCNT

6、sinsuchkindofmiscibleblendfrombothaperspectiveofacademicresearchandindustrialproduction．ThepresentthesisisfocusedoninvestigatingtheinfluencingmechanismofCNTsonpoly(vinylidenefluoride)(PVDF)／poly(methylmethacrylate)(PMMA)miscibleblend．CarboxylfunctinanlizedCNTswereintroducedintoPVDF／PMMAmiscibleble

7、ndtopreparethetemarynanocomposites．ThedispersionstatesandthemicrostructuresofCNTswerefirstlycharacterized．Thenonisothermalandisothermalcrystallizationbehaviorsofthebinaryblendsandtheternarynanocompositesweresyste