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1、RadTechAsia2001,Kunming,ChinaUVCurablesiliconeadhesivefordifficulttobondmaterialsHAOJianqiangandHARAOsamuAbstractAUVcurablesiliconecompositionwasdevelopedwhichwascomprisedofanadditionreactionproductofamino-terminatedorganopolysiloxaneandavinylgroup-containingisocyanate,anacrylice
2、stermonomerandaphotoinitiator.ThecompositioncanbecuredbyUVtotoughelastomersandshowedexcellentadhesiontodifficulttobondmaterialssuchasPE,PP,PET,polyolefin,etc.withoutneedofanypretreatmentofthesurfaces.Thecompositionsweretransparentandfoundusefulaselastomericadhesives,pottingandsea
3、lingagents.Ultravioletcuring(UV),Difficulttobond,Polypropylene(PP),Polyethylene(PE),Poly(ethyleneterephthalate)(PET),Silicone,Acrylicester,Sealing,Potting,Adhesive,Adhesion1.INTRODUCTIONPolyethylene(PE),polypropylene(PP),andpoly(ethyleneterephthalate)(PET)aremostwidelyusedplastic
4、sinmodernsocietyandreceivedmuchmoreattentiontodayduetotheirharmonywiththeenvironmentandeaseofrecycle.Theunitassemblyoradhesionoftheseplasticssuchaslaminatingareoftenencountered,however,itisknowninthearttheyaredifficulttobondwitheachotherbyadhesivesbecauseoftheirlowsurfaceenergy,l
5、owpolarity,andlittleornoporosity.Toimprovetheadhesionofthesematerials,surfacetreatments,suchasplasmatreatment,coronadischarge,chemicaloxidation,andprimercoatinghavebeenusedtoalterthesurface.Butthesetreatmentsareexpensiveandtimeconsuming,andarenotalwayspossible.Inapplicationsconce
6、rnedwiththesedifficulttobondmaterials,hotmeltadhesive,cyanoacrylatewithprimersystem,two-componentepoxyresin,andtwo-componentacrylateadhesivehavebeendeveloped.Butthesesystemsarestillnotsatisfactorytomeettheneedsofhighspeedlinerequirement.Primertreatmentorpremixinghandlingfortwo-co
7、mponentsystemsisalsonegativefactorsinpracticalapplications.UVcurableresinsareone-componentandcanbecuredinsecondsmakeitagoodchoicepreferableinhighspeedlineproduction.However,therearefewreportsofUVcuringtyperesinsfocusingonthesedifficulttobondmaterials.Here,weconcentratethestudyonU
8、Vcurablesiliconetosearchforthepossibilit