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TheinfluenceofthermaltreatmentonTheinfluenceofthermaltreatmentonthethehierarchicalstructurehierarchicalstructureofHDPEinofHDPEinGAIMGAIMStudentStudent::ShanHeShanHeSurpervisor:MingboYangSurpervisor:MingboYang20120155-1-1-1-100MeltfillingGasdelaytimeGasinjectionGas-assistedpackingDemoldingGAIMcycleAdvantagesclampingtonnagecycletimematerialconsumptionetcBackgroundBackgroundProcessparameterdelaytimemoldtemperturemeltingtemperturegaspressure(a)(b)(c)(d)SchematicrepresentationfortheclassificationofHDPEparts:(a)skinlayer;(b)sub-skinlayer;(c)intermediatelayer;and(d)gaschannelzoneτγ′⋅<1orτγ′⋅>1Materialpolymer/polymerblendsPC/PEPA/PEHDPE/HDPEHDPE/LLDPEBackgroundpolymer/fillerblendsGF/PAGF/PPHDPE/MWCNTSinglecomponentpolymerMolecularweightdistributionLongchainbranchRadiationcross-linkingExprimentsGAIMGAIMThermaltreatment(280,2.5h,5h,10h)℃HDPEMelttemperature(℃)210Moldtemperature(℃)40Shotsize(%)80Gaspressure(MPa)10.4Gasdelaytime(s)1Gasinjectiontime(s)20Table.1ProcessingparametersoftheGAIMprocessesResultsanddisscusionsionFTIRXRDSSAResultsanddisscusionsionResultsanddisscusionsionDSCResultsanddisscusionsion(a)(b)(c)Rheologicalproperty(a)5μmshish-kebab5μm(b)shish-kebab5μm(c)Orientedlamella(d)5μmSpheruliteNeat60982.5H5μmshish-kebab(a)5μmshish-kebab(b)5μmOrientedlamellaSpherulite(c)5μmOrientedlamellaSpherulite(d)Resultsanddisscusionsion10H5H5μm(b)shish-kebab5μm(a)shish-kebab(c)5μmshish-kebab(d)5μmOrientedlamella5μm(a)shish-kebab5μm(b)shish-kebab5μm(c)Orientedlamella5μm(d)OrientedlamellaResultsanddisscusionsionResultsanddisscusionsionTensiletestHypotheticalmechanismThermaltreatingcanreducethecontentsofshortchainbranch(SCB)inHDPE.WiththereduceofthecontentsofSCB,theHDPEsamplesperformbetterorientedcrystallinestuctureaswellastensileproperty.Thankyou!