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Contributions to the photochemistry of poly(4-vinylpyridine) and its ionic derivatives in the presence of water

Paper ID Volume ID Publish Year Pages File Format Full-Text
28073 44058 2009 8 PDF Available
Title
Contributions to the photochemistry of poly(4-vinylpyridine) and its ionic derivatives in the presence of water
Abstract

Films of poly(4-vinylpyridine), poly(N-carboxyethyl-4-vinylpyridine) and poly(N-allyl-4-vinylpyridine) chloride were exposed at a radiation spreading between about 250 and 270 nm, and the photochemical processes were monitored by spectroscopic methods. Reaction mechanisms considering: (i) a double role of the water molecule, to form water–pyridine ring hydrogen bonds and to accept hydrogen atoms, (ii) the scission of CH methine bonds in units with photoexcited pyridine rings, (iii) the scission of N+C bonds in betaine units, and (iv) crosslinks appearing by recombination of carbon macroradicals or by the addition of methine groups to allyl groups, were found to explain the photocrosslinking of the three polymers. Their properties of crosslinking photoresists were observed by AFM and the best ones were found for the polymer with N-allyl-pyridinium chloride units.

Keywords
Poly(4-vinylpyridine); Quaternized poly(4-vinylpyridine); Photochemical reactions; Photocrosslinking; Reaction mechanism; Photoresist
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Contributions to the photochemistry of poly(4-vinylpyridine) and its ionic derivatives in the presence of water
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 207, Issues 2–3, 25 September 2009, Pages 260–267
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
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