an article is provided which comprises a polyolefin first substrate adhered to a second substrate with an epoxy adhesive . the polyolefin first substrate has graft - polymerized thereto at least one monomer selected from the group consisting of sulfonic and carboxylic acids and alkyl esters thereof containing fewer than eight carbon atoms in the ester group , amides , and mono - and di - substituted amides , alcohols , amines , and 5 -, 6 -, and 7 - membered heterocyclic rings having at least one oxygen and / or nitrogen atoms in the ring , with the proviso that said monomer contain an ethylenically unsaturated polymerizable moiety . the graft - polymerized monomers are in a layer less than 5 micrometers in thickness and contact the epoxy adhesive .