PLA热性能参数的研究

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CHINAPLASTICSINDUSTRY40120121*———51033003**xrfu666@scu.edu.cn1987。zhanglai3012@126.comPLA***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·

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