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The Synthesis of a Bio-based Polyester and Its Toughening in Polylactide  
The Synthesis of a Bio-based Polyester and Its Toughening in Polylactide
資料類型: PDF文件
關鍵詞: biobased  engineeing  elastomer  polycondensation  nanoparticles  polylactide  toughness  
資料大小: 104K
所屬學科: 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:
Biobasedpolymerproductsderivedfromannuallyrenewableagriculturalandbiomassfeedstockhavebecomeincreasinglyimportantassustainableandeco-efficientproductswhichcanreplacetheproductsbasedexclusivelyonpetroleumfeedstock.Withinthisframework,theconceptofbiobasedengineeingelastomer(BEE)isproposedanddemonstratedhereasapracticalsolution.Further,large-scaledbiobasedmonomers,suchassebacicacid,itaconicacid,succinateacid,1,3-propanediolandl,4-butanediolwerechosentogeneratethesyntheticBEEmatricesthroughmeltingpolycondensation,whicharelinearandnoncrystallinecopolyesterswithlowglasstransitiontemperature(Tg)andcrosslinkablegroups.ThenanoparticlessuchassilicaandcarbonblackwerethenintroducedintotheBEEmatricestosuccessfullyrealizethegreatstrengtheningandimprovedenvironmentalstability.ChemicalcrosslinksthroughcrosslinkablegroupsofBEEmacromoleculesandcuringagentsuchasperoxideendowedtheBEEwithnecessaryhighelasticity,lowcrystallinityandrequiredenvironmentalstability.TheacquiredBEEdemonstratedexcellentmechanicalproperties,suchasanultimatetensilestrengthof20MPa,goodbiocompatibilityandadvancedcomprehensiveperformance.Inviewofitsnicemechanicalproperties,goodbiocompatibility,aswellasthepossiblecompatibilitywithPLA,BEEwasconsideredtobeagoodcandidatefortougheningofPLA.TheobtainedPLA/BEEcompositesexhibitedsignificantlyimprovedmechanicalpropertiesandtounghnesswhenadding10wt%BEE.OurresearchindicatesthatthesePLA/BEblendsholdgreatpotentialforbothengineeringandbiomedicalapplications.
作者: L. Q. Zhang, H. L. Kang
上傳時間: 2013-06-27 13:54:08
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