VARTM Process for Ramie Fiber Fabric Reinforced Anionic Polyamide-6 Composites，第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）-中国聚合物网,论文下载

VARTM Process for Ramie Fiber Fabric Reinforced Anionic Polyamide-6 Composites

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vartm anionic polyae-6 ramie fiber fabric thermoplastic
composites

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分子表征

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第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）

简介：

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

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2013-06-26 15:37:56

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