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1、InternationalJournalofAdhesion&Adhesives20(2000)449}456Anewepoxy/episul"deresinsystemforcoatingapplications:curingmechanismandpropertiesKatsuyukiTsuchida,JamesP.Bell*DepartmentofChemicalEngineering,PolymerProgram,InstituteofMaterialsScience,U-136,UniversityofC
2、onnecticut,97N,EaglevilleRoad,Storrs,CT06269-3136,USAAccepted21March2000AbstractAnewepoxy/episul"deresinwasappliedusingapolyamide(V-40t)curingagentsystem.Theepoxy/episul"de/V-40tsystemexhibitsmuchfastercure,bettercorrosionprotectionforcopper,alowerthermalexpan
3、sioncoe$cientandlowerexothermascomparedwithstandardaminecure,room-temperatureepoxysystems.Frommodelcompoundstudies,episul"de}amine,S~}epoxy,epoxy}aminereactionsandepisul"dehomopolymerizationproceedintheepoxy/episul"desystem.Thecuringreactionsarechangedbychangi
4、ngthecuringtemperatureandbythepresenceofcopper.Theepisul"dehomopolymerizationandtheS~}epoxyreactionincreaseinthecaseofroom-temperaturecuringorinthepresenceofcopper.Theepisul"deand/ortheS~reactwithcopper.FromDSCmeasurements,theresinnearthecoppersurfacehashigher
5、¹thanthebulkresinduetothefactthattheepisul"detendsto'polymerizenearthecoppersurface.(2000ElsevierScienceLtd.Allrightsreserved.1.Introductionthanthoseofstandardepoxies.Inadditiontotheim-provedpropertiesoftheresinitself,theepisul"degroupEpoxyresinsarewidelyusedf
6、orprotectivecoatingswasexpectedtoreactwithmanykindsofmetalsdueto[1,2],duetothestrongadhesionandcorrosionprotec-thefactthatthiolgroups(}SH)easilyreactwithcommontionofmetals.However,althoughtypicalepoxyresinsmetalsurfaces,suchasgold[5}9],silver[10,11],coppershow
7、excellentinitialadhesiontoseveralcommonmeta-[12}20],andiron[21,22],toformsulfur}metalbonds.ls,theadhesionafterwaterexposureisnotgood;im-Therefore,theepoxy}episul"deresinsystemwasex-provementisstronglyneeded.Becausemetalsaresubjectpectedtoimprovenotonlybulkresi
8、nproperties,butalsotocorrosionproblems,someprotectivetreatmentsuchascorrosionresistanceandadhesion.metalplating,chromate,corrosioninhibitors,orcoup-Inthisstudy,inordertoeliminateot
