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1、PolymerDegradationandStability95(2010)677e683ContentslistsavailableatScienceDirectPolymerDegradationandStabilityjournalhomepage:www.elsevier.com/locate/polydegstabHydrothermalageingofradiationcuredepoxyresin-polyethersulfoneblendsasmatricesforstructuralcompositesa,*abaaS.Alessi,D.Conduruta,
2、G.Pitarresi,C.Dispenza,G.SpadaroaDipartimentodiIngegneriaChimicadeiProcessiedeiMateriali(DICPM),UniversitàdiPalermo,VialedelleScienze,90128,Palermo,ItalybDipartimentodiIngegneriaMeccanica(DIMA),UniversitàdiPalermo,VialedelleScienze,90128,Palermo,ItalyarticleinfoabstractArticlehistory:Thehyd
3、rothermalageingofepoxyethermoplasticblends,usedasmatricesforcarbonfibrecomposites,Received23July2009curedbyelectronbeam,hasbeenstudied.Twodifferentthermoplasticpercentageshavebeenadopted.ReceivedinrevisedformAsuitablechoiceofbothcuringprocessandformulationparametersallowstocarryoutirradiatio
4、natmild27October2009temperaturewithseveraladvantages,comingfroma“nonthermal”process,forboththefinalpropertiesAccepted23November2009ofthematerialsandtheenvironment.NeverthelesstheoccurringofvitrificationphenomenaneedstheuseAvailableonline19January2010ofashortthermaltreatmentafterirradiationont
5、healreadysolidmaterials,inordertocompletethecurereactions.RadiationcuredepoxybasedmatriceshavebeensubjectedtoathermalandmoistureabsorptionKeywords:ageingtreatmentanditsinfluenceonthethermalandmechanicalpropertieshasbeeninvestigatedthroughRadiationcuringStructuralcompositesdynamicmechanicalth
6、ermalanalysisandfracturetoughnesstests.TheresultshavebeeninterpretedHydrothermalageingonthebasisofthedifferentcuringdegreereachedbytheinvestigatedsystemsandinthelightoftheirFracturetoughnessmorphologicalstructures.Plasticization,thermalcuringanddegradationreactionsoccurindifferentextentdepe
7、ndingonthekindofthematerial.Inparticular,forfractureproperties,abetterresistancetoageingisshownbythesystemathigherthermoplasticconcentration.Ó2009ElsevierLtd.Allrightsreserved.1.Introductionandtheglasstransitiontemperature,Tg,respectively.Inthecaseoffibre
