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1、Effectoftherheologicalpropertiesofindustrialhot-meltandpressure-sensitiveadhesivesonthepeelbehavior2F.X.GIBERT1,A.ALLAL1,G.MARIN1,andC.DERAIL1LaboratoiredePhysiquedesMatériauxIndustriels,UniversitédePauetdesPaysdel'Adour,64000Pau,France2EcoleSupérieured'Agricultured'Angers,
2、49007Angers,FranceReceivedinfinalform20March1999Abstract-Threefactorsgoverntheadhesionpropertiesofhot-meltandpressure-sensitiveadhesives:(1)thermodynamicinterfacialproperties(Dupréadhesionenergy);(2)interfaciallossesduetospecificinteractions;and(3)viscoelasticlossesinthebul
3、krelatedtotherheologicalpropertiesoftheadhesive.Inthepresentpaper,wefocusonthemainfactorintheadhesionproperties,whichistheviscoelasticfactor.Weextendinthispapertheresultsobtainedonaseriesofmodeladhesivestothecaseofindustrialformulations:oneSIStriblockcopolymer-basedPSAformu
4、lationandoneEVAcopolymer-basedhot-meltformulation.Afterstudyingtherheologicalpropertiesoftheseadhesivesoverawidefrequencyrangeusingtime-temperatureequivalence,wepresentdataobtainedonpeeltestsatvarioustemperatures.Aswithmodeladhesives,thepeelrate-temperatureequivalenceleadst
5、othesameshiftfactorsasrheology.Theexperimentsdemonstratethatthereisaone-to-onerelationshipbetweenthecohesivefracturedomainandtheterminalregionofrelaxationexhibitedinrheologicaltesting.Thefirstinterfacialfracturemodeisrelatedtotherubberyplateau,andthebrittleinterfacialfractu
6、remodeobservedathighpeelratestotheglassybehaviorexhibitedatveryhighfrequenciesinrheologicalmeasurements.Keywords:Adhesion;peeling;hot-meltadhesives(HMAs);pressure-sensitiveadhesives(PSAs);rheology;styrene-isoprene-styrene(SIS);ethylenevinylacetate(EVA).1.INTRODUCTIONThebasi
7、cformulationofhot-meltadhesives(HMAs)andpressure-sensitiveadhe-sives(PSAs)involvesapolymeroranelastomer,oneorseveraltackifyingresinsDownloadedby[InstituteofScientific&TechnicalInformationofChina]at16:5225November2012whichgive'tack'tothematerialandgoverntheglasstransitiontem
8、perature,andotheradditivessuchascrystallinewaxes,whicheventuallygovernthetemperatu
