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Vacuum Infusion Thermoplastic Composites for Natural Fiber Fabric Reinforced Anionic Polyamide-6  
Vacuum Infusion Thermoplastic Composites for Natural Fiber Fabric Reinforced Anionic Polyamide-6
資料類型： PDF文件
關(guān)鍵詞： vacuum  infusion  process  anionic  polyae-6  natural  fiber  
fabric  performance  
資料大小： 108K
所屬學(xué)科： 分子表征
來源： 第六屆亞歐研討會(huì)上處理和性能增強(qiáng)聚合物會(huì)議文集（2013.6.2-6 武漢）
簡介：
Inordertomanufacturelarger,thicker,morehomogeneousandcomplicatedthermoplasticcompositesthancurrentlycanbeachievedbymeltprocessing,avacuuminfusionprocessiscurrentlybeingdevelopedusingareactivethermoplasticpolymercalledanionicpolyamide-6(APA-6).Inpreviousstudiesitwasprovedthattheanionicpolyamide-6(APA-6)resinthatisusedhasexcellentmechanicalproperties.Naturalfiber,asakindoflowcost,lightweight,highspecificstrengthandstiffness,andnaturaldegradationofenvironment-friendlymaterial,usedinreinforcedcompositesiswidelyconcerned.However,nonaturalfiberreinforcedreactivethermoplasticpolymergradeshavebeenpreparedsofar.ThemainreasonistheapparentlypolymerizedbarrierbetweennaturalfiberandtheAPA-6,whichresultsinincompletepolymerizationwhenputtogether.Firstly,thereactionmechanisminthein-situpolymerizationprocessofnaturalfiber-reinforcedAPA-6wasdiscussedbycastingprocess.ItwasshownthatthelargenumberofhighlyreactivehydroxylonthesurfaceofnaturalfiberproducedaseriousbarriertoAPA-6,andthefiberbecamedarkbrown.Inordertosolvetheproblem,amethodwasadoptedbyusingalow-activityinitiatorcalledcaprolactammagnesiumbromide,whichhadinertreactivityandweaklyalkaline,limitedthereactionwiththehydroxylgroupsonthecellulose.Itwouldreducetheconsumptionoftheinitiator.Thustheinhibitorrolehasbeensignificantlyimproved.Thenasuitablemorphologicalstructureoffiberfabricwasselectedtoyieldintegratedcompositeswithanaveragethicknessof2.5mmandafiberweightcontentof40%byvacuuminfusionprocess.Thesoxhletextractionanddifferentialscanningcalorimeter(DSC）measurementsrespectivelysuggestedthedegreeofconversionandcrystallizationofcompositeswashigher.RemarkableimprovementofmechanicalpropertieswasachievedforAPA-6/naturalfibercompositesthroughdynamicmechanicalanalysis(DMA)andthree-pointbendingtest.Favorableinterfacialadhesionandwettabilitywererevealedbyscanningelectronmicroscopy(SEM)observation.
作者： Z. Kan,P. Chen, M. B. Yang
上傳時(shí)間： 2013-07-02 15:46:22
下載次數(shù)： 1
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