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1、JournalofMetals,MaterialsandMinerals,Vol.18No.2pp.187-190,2008ImpactBehaviorsandThermomechanicalPropertiesofTPP-FilledPolycarbonate/Acrylonitrile-Butadiene-StyreneBlends12TeerapatMATCHIMAPIRO,PotejaneeSORNTHUMMALEE,11,*ThanyawatPOTHISIRIandSarawutRIMDUSIT
2、1PolymerEngineeringLaboratory,DepartmentofChemicalEngineering,FacultyofEngineering,ChulalongkornUniversity,Bangkok10330,Thailand2thPTTPhenolCo.,Ltd.,36Floor,SunTower,Chatuchak,Bangkok10900,Thailand3DepartmentofCivilEngineering,FacultyofEngineering,Chulalo
3、ngkornUniversity,Bangkok10330,ThailandReceivedJan.15,2008AbstractAcceptedFeb.11,2009Inthisstudy,effectsoftriphenylphosphate(TPP)flameretardantontheimpactcharacteristicsandthermophysicalpropertiesofpolycarbonate/acrylonitrile-butadiene-styreneblends(PC/ABS
4、)blendsforflameresistantapplicationwereinvestigated.TheamountoftheTPPadditivewasvariedat0to10wt%.TheresultsrevealedthatthevalueoftheimpactstrengthdecreasedwithanincreasingcontentoftheTPP.Fromdynamicmechanicalanalysis,twoglasstransitiontemperatures(Tg’s)fo
5、rPCandABSphasesat158andO125C,respectively,oftheblendclearlysuggestedtheimmisciblenatureofthetwopolymersthoughwithsomedegreeofmixing.TheamountoftheTPPadditivewassystematicallyvaried.Theresultsrevealedthatthevalueoftheglasstransitiontemperature(Tg)fromTanδo
6、fthePC/ABSblenddecreasedwithincreasingthecontentofTPP.Incontrast,withincreasingthecontentsofTPP,thestrangemodulioftheblendspecimensatroomtemperaturesystematicallyincreased.Furthermore,SEMmicrographsrevealedthatTPPcrystalswereformedintheABSrichphaserathert
7、haninthePCrichphase.ThepresenceoftheTPPcrystalspredominantlyinthePCphasewasalsoconfirmedbyacidandbaseetchingtechniquestodissolvetheABS,andthePCphases,respectively.Thecrystalformationexplainedthedeteriorationoftheimpactpropertiesoftheblend.TheV-0categoryof
8、UL-94standardofflammabilitytestcanalsobeachievedusingtheTPPsystem.Keywords:Polycarbonate/acrylonitrile-butadiene-styreneblends,TPPadditive,Impactstrength,FlammabilityIntroductiontargetforflameretardancybecauseofthei
