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ID:32328520
大小:28.51 MB
页数:93页
时间:2019-02-03
《cnts诱导pvdf2fpmma相容共混物结晶与相分离的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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
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