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UV crosslinking of Fe 3+ ‐doped poly(vinyl alcohol)—Characterization of optical properties and swelling behavior
Author(s) -
Schauberger Jörg Guido,
Riess Gisbert,
Kern Wolfgang
Publication year - 2013
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39109
Subject(s) - vinyl alcohol , materials science , irradiation , polymer , doping , swelling , molar absorptivity , photobleaching , uv curing , aqueous solution , molar mass , polymer chemistry , curing (chemistry) , chemical engineering , composite material , fluorescence , chemistry , organic chemistry , optics , physics , optoelectronics , nuclear physics , engineering
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:FeCl 3 films decreases significantly during UV irradiation (Δ n D = −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