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Polyurethane Reinforced by Nano-fiber Supramolecular Aggregates  
Polyurethane Reinforced by Nano-fiber Supramolecular Aggregates
资料类型: PDF文件
关键词: Self-assembly  Nano-fiber  Molecule  reinforce  
资料大小: 68K
所属学科: 通用高分子材料
来源: 来源网络
简介:
Molecularcompositeandin-situcompositematerialshaveadistinctadvantageincomparisonwiththetraditionalmacro-fiber(suchasglassfiber,carbonfiber,boronfiber,etc.)reinforcedmaterials.Thisisattributedtothefactthattheircompositeinterfaceisinthemolecularlevel,improvingsignificantlytheinterfacecompatibilityofphaseandmatrixandthemechanicalpropertiesofmaterialscl-4].Inthiswork,weintroducednano-fibrousaggregatedbygelatorl,3:2,4-dibenzylidenesorbitol(DBS)intoconventionalpre-polymerresin(e.g.modifiedpolyurethaneoligomers).Withtheprincipleofmolecularcompound,wemadepre-polymerresingelationfirst,thenpreparedmolecularcompositepolymerbyphotopolymerizationtoachievereinforcedpolymer.TheresultsshowedthatDBShadgoodgelpropertiesinoligomersresin,aggregatedsupramolecularnano-fibrousbyself-assembly.Bymeasuringthestress-straincurvesofmoleculecompositematerials,withdifferentconcentrationofDBSaggregatesinmodifiedpolyurethane.ItwasfoundthatstrengthandtoughnessofmoleculecompositematerialscanbeimprovedinthepresenceofDBSaggregating.ThestrengthofDBSaggregatereinforcedpolyurethanecompositefilmscouldbeincreasedtoabout10%.
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