Method of Enhancing Adhesion of Silver Nanoparticle Inks on Plastic Substrates Using a Crosslinked Poly(vinyl butyral) Primer Layer
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Feb 12, 2016
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Feb 12, 2016
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A primer layer comprising a polyvinyl butyral resin enhances adhesion of silver nanoparticle inks onto plastic substrates. The primer layer comprises a polyvinyl butyral (PVB) resin having a polyvinyl alcohol content between about 18 wt. % to about 21 wt. %. The PVB resin may also have a glass transition temperature greater than about 70° C. Optionally, the PVB primer layer may further be enhanced by cross-linking using a melamine-formaldehyde resin. Conductive traces formed on plastic substrates having the PVB primer layer exhibit an acceptable cross-hatch adhesion rating with little to no degradation of adhesion being observed after exposure to 4-days salt mist aging or 1-day high humidity aging.
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