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Novel Flame-retardant Epoxy Composites Based on Zinc Methylethyl Phosphinate

資料類型：

PDF文件

關鍵詞：

zinc dialkylphosphinate flame retardant epoxy resin thermal
stability

資料大小：

110K

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：

Printedwiringboard(PWB)isthekeycomponentintheelectronicitem.Forthesafetyreason,PWBsmaterialsarerequiredtomeetdefinedflameretardancystandardssuchasUL94-VOratingcl].Epoxyresins(EP)arewidelyusedasresinbackboneforPWBbasematerials.Metalphosphinatesareanewclassofflameretardants.Inthepaper,EPcontainingzincmethylethylphosphinate(Zn(MEP》wereprepared.ThestructureofZn(MEP)wasconformedwithFTIR,IHNMR,3IPNMR,XRFandXRD.TheflameretardancyandthermalpropertiesofZn(MEP)/EPwereanalyzedbyalimitingoxygenindex(LOI),UL-94test,TG,FTIR,SEM-EDXaswellasDSC.ActivationenergyforthedecompositionofsamplewasobtainedusingtheKissingerequation.Zn(MEP)isahalogen-freeflameretardantwithacrystallinestructure.Itisathermallystablecompoundbelow4060C.Adding10wt%ofZn(MEP)causestheLOIofEPtoincreasefrom20.1%t026.6%.15一poundunderTi20wt%ofZn(MEP)canprovidesatisfactoryflameretardancy.ThecharobtainedbyheatingisverysmoothandcondensedandrichinP-andC-containingcomponents.Onthesurfaceofthechar,theatomicratioofP/Znisreducedcomparedtooriginalmaterial.Condensedcharlayerturnsouttobeofmostimportancefortheflameretardantperformance.TheP-andC-richcomponentsaswellasloweratomicratioofP/ZnonthecharsurfaceimpliesthattheZn(MEP)actsasbothcondensedphaseandgasphase.AddingZn(MEP)changesthemaindecompositionprocessoftheEPslightly,resultinginareductioninTi,anincreaseindecompositionactivationenergyandcharyield.Inaddition,theTgofEPcompositesisincreasedby200C一280CwithZn(MEP)contentvaryingfrom10wt%t025wt%.Comparingtocommercialproductsuchasaluminumphosphinates,Zn(MEP)haslessnegativeinfluenceontheinitialdecompositiontemperatureofEPandtheinteractionbetweenpolymerandadditivesismoreprominentinZn(MEP)filledEPsystem.Inaddition,Zn(MEP)filledEPshowshigherTgbutlowerLOIandcharforming.

作者：

H. Wang, X. Q. Liu,J. Y. Liu, H. Zhou, S. J. Cai

上傳時間：

2013-07-04 13:29:45

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