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Photoresponsive Functionalized Vinyl Cinnamate Polymers: Synthesis and Characterization
Author(s) -
Hyder Ali A.,
Srinivasan K. S. V.
Publication year - 1997
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199708)43:4<310::aid-pi739>3.0.co;2-g
Subject(s) - monomer , acryloyl chloride , benzophenone , polymer chemistry , polymer , azobisisobutyronitrile , fourier transform infrared spectroscopy , vinyl chloride , materials science , copolymer , chemistry , functional polymers , photochemistry , organic chemistry , chemical engineering , acrylate , engineering
A series of functionalized vinyl cinnamate monomers were synthesized by the reaction of hydroxyethylmethacrylate and various substituted cinnamoyl chlorides. Electron donating and accepting functional groups such as −OCH 3 , −Cl and −NO 2 were introduced at the para position of cinnamoyl chloride. Homopolymerization of the synthesized monomers were carried out in dimethylformamide using azobisisobutyronitrile as a free radical initiator at 80°C for 12h. The structures of the synthesized monomers and their polymers were characterized using Fourier transform infrared (FTIR), 1 H and 13 C nuclear magnetic resonance spectroscopic techniques. Solid‐state crosslinking of the above photosensitive polymers was studied by UV and FTIR spectroscopic techniques. The effects of various functional groups and the addition of sensitizer (benzophenone) on the photocrosslinking nature of the polymers were studied. The mechanism of photocrosslinking is a (2+2)π electron cycloaddition and not cis – trans isomerization in the functionalized polyvinylcinnamates. © 1997 SCI