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1、漆膜附着机理的探讨1adhesiontypeandadhesionofpaintfilmonsubstrateTheadhesionofthefilmonthesubstrateisdividedinto2types:mechanicalattachmentandchemicalattachment・Mechanicalattachmentisdependentonpropertiesofcoatingplate(theroughness,porosity)andtheformationofthefil
2、mstrength;chemicalattachmentreferstothemutualattractionofpaintfilmandplateinterfacefilmsheetmoleculesandmolecules,onthephysicochemicalpropertiesofpaintfilmandplateonit.Comparedtothe2types,thechemicalattachmentisgenerallybelievedtobemorepracticalandisthem
3、ostimportanttypeoffilmattachment・Studyonadhesionofpaintfilmiscoatedonthesurfaceoftheobject,3aspectsneedtopayattentiontotheproblem:(1)aliquidmembranematerialwettingdegreeonboard;(2)theformationofsubstratesurfacedirectionaladsorptionlayer;(3)filmandsubstra
4、teinterfaceformelectricdoublelayer・Theadhesionofthefilmdependsonthepolaritygroupsofthepolymer(orlowermolecularprepolymer)inthefilm-formingmaterial,suchas-OH,-C00H,andthecombinationofthepolargroupsonthesurfaceofthecoating.Inordertomakethepolargroupwithgoo
5、d,requirementsofpolymermoleculeshascertainliquidity,sothatpolymermoleculesbettermoistsubstrate,thepolarpolymerisclosetothepolarbasesurface:whenthedistancebetweenthemoleculesgetsverysmall(lessthan1A),polargroupbecauseofcomprehensiveFanDehua,chemicalaffini
6、ty,hydrogenbondingcohesiontobalanceattachment・2polarityofpaintfilmandcoatedsurfacewZ07}m,fromthepolarityandmolecularstructure,molecularinteractionperspective,polargrouporientedpolymermolecularadhesionproducedinthecoatingfilmofthemutualattractionbetweenth
7、epolargroupandthecoatedsurfacesofthepolarmolecule・Onlybetweenthetwopolargroupstoadapt,togetgoodadhesionofthepaintfilm;ontheotherhand,paintonthepolarityofgoodnonpolarplate,ornon-polarpaintonthepolarplate,willgetgoodadhesionofpaintfilm.isdirt,grease,dust,r
8、educethepolarityofthesurfaceofthesubstrate,reducepolarityofthepaintexample,dryingaminoaminoresin-CH20HinThepolarbasefilmandthesurfaceofanypartywillleadtoadeclineinreducedadhesiontosubstratesurface:(1)therewillcauseadhesion
