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Copolymeric systems bearing side‐chain thioxanthone and α‐aminoacetophenone moieties as photoinitiators for ultraviolet‐curable pigmented coatings
Author(s) -
Angiolini Luigi,
Caretti Daniele,
Corelli Elena,
Carlini Carlo,
Rolla Pier Angelo
Publication year - 1997
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/(sici)1097-4628(19970613)64:11<2247::aid-app20>3.0.co;2-#
Subject(s) - thioxanthone , photoinitiator , side chain , ultraviolet , materials science , polymer chemistry , photopolymer , bearing (navigation) , polymerization , composite material , polymer , optoelectronics , monomer , cartography , geography
Copolymers of 1‐(4‐morpholinophenyl)‐2‐benzyl‐2‐[N‐methyl‐N‐(3‐meth‐acryloyloxy propyl)]aminopropan‐1‐one and of 1‐(4‐morpholinophenyl)‐2‐benzyl‐2‐[N‐methyl‐N‐(3‐methacryloyloxypropyl)]aminobutan‐1‐one with 1‐[(2‐methacryloyloxy)ethoxycarbonyl]thioxanthone were prepared and structurally characterized. The above systems were also checked in the ultraviolet cure of an acrylic mixture upon irradiation over 380 nm, thus simulating the conditions of a TiO 2 ‐pigmented formulation. The curing results were compared with those obtained in the presence of the mixtures of the corresponding homopolymers as well as of their low‐molecular‐weight models. The copolymeric systems display synergistic effects of activity with respect to the structural models but show lower photoinitiation efficiency against the homopolymers mixtures. These data are discussed and interpreted in terms of structural requirements and photochemical mechanistic aspects of the above systems. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 2247–2258, 1997