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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)(P
2、LLA)inseveraldifferentcontenttoevaluatetheeffectsofthemonthethermaldegradationofPLLA,whichwereinvestigatedbymeansofthermogravimetricanalysis(TGA).Inkineticstudy,thethermaldegradationactivationenergy(Ea)ofPLLA/ILswerecalculatedbyKissinger,OzawaandFriedmanmet
3、hods.MálekmethodwasusedtomeasurethekineticfunctionsofPLLAandPLLA/3[EOEMIm]BF4.ILscouldreducethethermaldegradationtemperatureofPLLA,andthecationsplaymuchmoreimportantroles,whichcouldchangethecourseofPLLAthermaldegradation.Intheprobablekineticfunctionsstudies
4、,theadditionofILi.e.[EOEMIm][BF4]tothePLLAhasapronouncedeffectsonitspyrolyticdegradation,facilitatingthetransesterificationasevidentfromtheresultsobtainedbyapplyingAvarami-Erofe’ev(A3)model.Anotherkindofimidazolium-basedionicliquidwithtopologystructuregraft
5、edwithMPEGsegment(TSIL)wasalsoblendedwithPLLA.InthestudyofPLLA/TSILblendsmeltbehavior,TSILcouldformacertaindegreeofcross-linkednetworkstructurewithPLLAbytransesterification.TSILcouldalsodecreasethePLLAthermalstability.Tris-(3-methylimidazoliumchloride-2-car
6、boxyethyl)phosphine([TCEPMIm]Cl)wasusedtomodifymulti-walledcarbonnanotubes(MWCNTs).ThenthemodifiedMWCNTswasblendedwithPLLA,themeltcrystallizationandthermalstabilityoftheternarynanocompositeswerestudied,theflammabilitywereevaluatedbyconecalorimetertest.[TCEP
7、MIm]Cl-MWCNTscouldimprovethecrystallinityofPLLAandimprovetherapidestdegradationtemperature,butdecreasetheonsetdegradationtemperature.Thecompositeshoweda45%reductioninpeakheatrelease(HHR)whentestedintheconecalorimeter.Itrevealedthattheobvioussynergisticeffec
8、tbetween[TCEPMIm]ClandMWCNTswasveryefficientinimprovingtheflameretardanceofPLLAcomposite.Keywords:Polylacticacid;Ionicliquids;Thermalstability;Thermaldegradationkinetics;MultiwalledcarbonnanotubeIII万方数
