PLA热性能参数的研究

CHINAPLASTICSINDUSTRY40120121*———51033003＊＊[e-mail]1987。[e-mail]*＊＊610065DSCPLA40～180℃TPS。。TQ321.2A1005－5770201201－0068－04StudyontheThermalPropertyParametersofPLAZHANGLaiZHANGWen-xiaCAIGuang-nanFUXiao-rongCollegeofChemicalEngineeringSichuanUniversityChengdu610065ChinaAbstractThespecificheatcapacityofpolylacticacidPLAwasmeasuredfrom40℃to180℃obtainedbyDSCThethermalconductivityanddiffusivityofPLAindifferentinjectionprocesseswereinvesti-gatedusingTPS．ItwasfoundthatthespecificheatcapacityofPLAwouldchangewiththetemperaturewhichleadstothedifferenceofthesolidliquidphaseofspecificheatcapacity．Theinjectiontechnologyhadlittleeffectonthethermalconductivityandcouldbeignoredwhileinjectionpressurehadinfluenceonthethermaldiffusivity．ItwasconcernedwiththephasestructureofPLA．KeywordsPLASpecificHeatCapacityThermalConductivityThermalDiffusivity。。200510%1。。PLA。2。。、、3。、4。。。、、。。。Pyda5DSCARC5K600K、3%。·86·401PLA。TPS40～180℃、。11.1REVODE110。PS40E5ASEHotDisk-2500DSC204F1α-Al2O3≥99.9%METTLERAB135-S。1.240～180℃10℃/min35mg、11.557mg5mgDSC10min。1.31.3.165cm3mm。1。1.3.27－8。1。。1TPSFig1TPStechniqueformeasuringthermalconstantofsolid22.1、。40～180℃2。2PLAFig2Thetrilinearchartofspecificheatcapacity240～180℃。40～60℃60～120℃120～160℃160～180℃。PLAYPLA1。DSC3。·96·2012Cp=C'pm'hmH1CpC'p－J/kg·Kmm'－mghH－W。3PLAFig3ThevariationoftemperatureonspecificheatcapacityofPLA1DSC。。。1950J/kg·K2120J/kg·K。ATHAS92。25%。2.2。4。4。。。。。0.231W/m·K。4PLAFig4VariationofthermalconductivityofPLAindifferentprocesscondition。。。5。5Fig5VariationofthermaldiffusivityofPLAindifferentprocesscondition5PLAPLA·07·401PLA。10。。0.205mm2/s。31DSCREVODE11040～180℃。1950J/kg·K2120J/kg·K。5%DSC。2TPS、。。。1LIMLTAURASRRUBINOM．ProcessingtechnologiesforpolylacticacidJ．ProgPolymSci200833820－823．2GARLOTTAD．AliteraturereviewofpolylacticacidJ．JPolymEnviron2001963－84．3．J．201140146－48．4．M．200753－54．5PYDAMBOPPRCWUNDERLICHB．HeatcapacityofpolylacticacidJ．JChemThermodyn200436731－7426．HDPE/PPD．200925－26．7SALEHAAILANAL．MeasurementsofthermalpropertiesofinsulationmaterialsbyusingtransientplanesourcetechniqueJ．ApplThermEng2006262184－2191．8FAMBRILPEGORETTIAFENNERRetal．Biode-gradablefibresofPLAproducedbymeltspinningJ．Poly-mer199738178－859ATHASdatabankDB/OL．http//web.utk.edu/～athas/databank/intro.html．10JOSESAPREMASFRANCISBetal．Phasemor-phologycrystallisationbehaviourandmechnicalpropertiesofisotacticpolypropylene/highdensitypolyethyleneblendsJ．EurPolymJ2004402105－2115．2011－09－21PEPEPE、、。1995PE。PE。PEPE、———PE。PE。。PVC。。PEPVC———PVC-MPVC-U。。35°。PCCP。PCCP。。19999217.3PCCP。10km4m、3kmPCCP。·17·