A. Elachari et X. Coqueret, PHOTOCROSSLINKABLE VINYLAMINE COPOLYMERS .1. SYNTHESIS AND PHOTOSENSITIVITY OF CINNAMOYLATED POLYVINYLAMINE, Journal of polymer science. Part A, Polymer chemistry, 35(12), 1997, pp. 2513-2520
Vinylamine copolymers prepared by the Hofmann reaction were functional
ized by amidification with cinnamoyl chloride. The resulting photosens
itive polymers, which are the nitrogen analogues of poly(vinylcinnamat
e), can be prepared with various contents of cinnamamide side groups.
The polymers exhibit a marked hydrophilicity and undergo efficient cro
sslinking upon exposure to 250-300 nm UV light. The sensitivity S expr
essed in cm(2).J(-1) was shown to be higher for a given conf ent, tau,
in cinnamamide groups expressed in mol.g(-1) when the residual vinyl
amine units are in the ammonium form. The dependence of S upon tau was
of the second order for the free base form of the photopolymers, but
a higher order with S approximately proportional to tau(3) for the hyd
rochloride form of the photosensitive polymers. (C) 1997 John Wiley &
Sons, Inc.