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VARTM Process for Ramie Fiber Fabric Reinforced Anionic Polyamide-6 Composites  
VARTM Process for Ramie Fiber Fabric Reinforced Anionic Polyamide-6 Composites
資料類型： PDF文件
關(guān)鍵詞： vartm  anionic  polyae-6  ramie  fiber  fabric  thermoplastic  
composites  
資料大?。?/td> 109K
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(jiǎn)介：
Textilefiberreinforcedthermoplasticcompositesareincreasinglyusedformanufacturinghigh-performancelight-weightstructuresin,forinstance,theaerospaceandautomotiveindustry.Sincetheviscosityofthermoplasticpolymermeltsistoohigh,apoorimpregnationormoldfillwouldbehappened.Inordertomanufacturelarger,thickerandmoreintegratedthermoplasticcompositesthancurrentlycanbeachievedbymeltprocessing,avacuumassistedresintransfermolding(VARTM)iscurrentlybeingdevelopedusingareactivethermoplasticpolymercalledanionicpolyamide-6(APA-6).Naturalfiber,asakindoflowcost,lightweight,highspecificstrengthandstiffness,andnaturaldegradationofenvironment-friendlymaterial,usedinreinforcedcompositesiswidelyconcerned.However,nonaturalfiberreinforcedreactivethermoplasticpolymergradeshavebeenpreparedsofar.Throughourpreviousstudies,itwasdemonstratedthattherewasastronginteractionbetweenthelargenumberofhighlyreactivehydroxylonthesurfaceofcelluloseandtheinitiatorofAPA-6,whichresultinincompletepolymerizationwhenputtogether.Inordertosolvetheproblem,amethodwasadoptedbyusinganew-styleinitiatorcalledcaprolactammagnesiumbromide,whichhaslowerreactivityandweakeralkalineduetothefactthatitscationislargerandlessacidic,thuslimitedthereactionwiththehydroxylgroupsonthecellulose.itwouldmarkedlyreducetheconsumptionoftheinitiator.Asaresult,theroleofinhibitorhasbeensignificantlyimproved.FollowingramiefiberfabricreinforcedAPA-6compositeswithanaveragethicknessof2.5mmwaspreparedbyVARTM.Thesoxhletextractionanddifferentialscanningcalorimeter(DSC)measurementsrespectivelysuggestedthedegreeofconversionandcrystallizationofcompositeswas94%and50%.Remarkableimprovementofmechanicalpropertieswasachievedthroughdynamicmechanicalanalysis(DMA)andthree-pointbendingtest.Favorableinterfacialadhesionandwettabilitywererevealedbyscanningelectronmicroscopy(SEM)observation.Thevoidcontentandfiberfractionofcompositesweremeasuredbydensimeter.
作者： M. B. Yang, Z. Kan
上傳時(shí)間： 2013-06-26 15:37:56
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