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1、ABSTRACTInthispaper,sevendifferentkindsionicliquids,[HOEMIm]BF4,[AOEMIm]BF4,[EOEMIm]BF4,[BMIm]BF4,[EOEMIm]NO3,[EOEMIm]Brand[EOEMIm]PF6,weresynthesized,theycouldbeclassifiedaccordingtothetypesofcationsandanions.EachILsweresolutionblendedwithpoly(L-lactide)(PL
2、LA)inseveraldifferentcontenttoevaluatetheeffectsofthemonthethermaldegradationofPLLA,whichwereinvestigatedbymeansofthermogravimetricanalysis(TGA).Inkineticstudy,thethermaldegradationactivationenergy(Ea)ofPLLA/ILswerecalculatedbyKissinger,OzawaandFriedmanmetho
3、ds.MálekmethodwasusedtomeasurethekineticfunctionsofPLLAandPLLA/3[EOEMIm]BF4.ILscouldreducethethermaldegradationtemperatureofPLLA,andthecationsplaymuchmoreimportantroles,whichcouldchangethecourseofPLLAthermaldegradation.Intheprobablekineticfunctionsstudies,th
4、eadditionofILi.e.[EOEMIm][BF4]tothePLLAhasapronouncedeffectsonitspyrolyticdegradation,facilitatingthetransesterificationasevidentfromtheresultsobtainedbyapplyingAvarami-Erofe’ev(A3)model.Anotherkindofimidazolium-basedionicliquidwithtopologystructuregraftedwi
5、thMPEGsegment(TSIL)wasalsoblendedwithPLLA.InthestudyofPLLA/TSILblendsmeltbehavior,TSILcouldformacertaindegreeofcross-linkednetworkstructurewithPLLAbytransesterification.TSILcouldalsodecreasethePLLAthermalstability.Tris-(3-methylimidazoliumchloride-2-carboxye
6、thyl)phosphine([TCEPMIm]Cl)wasusedtomodifymulti-walledcarbonnanotubes(MWCNTs).ThenthemodifiedMWCNTswasblendedwithPLLA,themeltcrystallizationandthermalstabilityoftheternarynanocompositeswerestudied,theflammabilitywereevaluatedbyconecalorimetertest.[TCEPMIm]Cl
7、-MWCNTscouldimprovethecrystallinityofPLLAandimprovetherapidestdegradationtemperature,butdecreasetheonsetdegradationtemperature.Thecompositeshoweda45%reductioninpeakheatrelease(HHR)whentestedintheconecalorimeter.Itrevealedthattheobvioussynergisticeffectbetwee
8、n[TCEPMIm]ClandMWCNTswasveryefficientinimprovingtheflameretardanceofPLLAcomposite.Keywords:Polylacticacid;Ionicliquids;Thermalstability;Thermaldegradationkinetics;MultiwalledcarbonnanotubeIII万方数
