Photoresponsive Functionalized Vinyl Cinnamate Polymers: Synthesis and Characterization

✍ Scribed by Hyder Ali, A.; Srinivasan, K. S. V.

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 351 KB
• Volume: 43
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199708)43:4<310::aid-pi739>3.0.co;2-g

✦ Synopsis

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 wOCH 3 , wCl and were introduced at the para position of cinnamoyl chloride. wNO 2 Homopolymerization of the synthesized monomers were carried out in dimethylformamide using azobisisobutyronitrile as a free radical initiator at 80¡C for 12 h. The structures of the synthesized monomers and their polymers were characterized using Fourier transform infrared (FTIR), 1H and 13C nuclear magnetic resonance spectroscopic techniques. Solid-state crosslinking of the above photosensitive polymers was studied by UV and FTIR spectroscopic techniques. The e †ects 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)n electron cycloaddition and not cisÈtrans isomerization in the functionalized polyvinylcinnamates.