UV crosslinking of Fe3+‐doped poly(vinyl alcohol)—Characterization of optical properties and swelling behavior |
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| Authors: | Jörg Guido Schauberger Gisbert Riess Wolfgang Kern |
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| Affiliation: | Department of Polymer Engineering and Science, Chair of Chemistry of Polymeric Materials, University of Leoben, Otto‐Gloeckel‐Street 2/4, 8700 Leoben, Austria |
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| Abstract: | The effects of UV irradiation on iron(III)chloride doped poly(vinyl alcohol) (PVA) films, using a high molar mass polymer, have been studied. It has been found that the polymer is oxidized and crosslinked during UV irradiation. UV/VIS spectra reveal an exponential loss of absorption at λ = 360 nm, and the refractive index of the PVA:FeCl3 films decreases significantly during UV irradiation (ΔnD = ?0.09). The effects of crosslinking have been studied using the sol–gel technique, which revealed high gel contents due to doping and UV‐exposure. Photolithographic patterning of doped PVA films using a medium‐pressure mercury‐vapor UV source has been carried out, leading to good contrast behavior before and after development in aqueous media. A photobleaching effect was observed, therefore the curing of thicker films is feasible. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 |
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| Keywords: | coatings crosslinking swelling photochemistry |
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