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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：

第六屆亞歐研討會上處理和性能增強聚合物會議文集（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

上傳時間：

2013-07-02 15:46:22

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