Photophysics and photochemistry of side-chain substituted liquid crystalline polyaryl cinnamates

Sangya Singh; David Creed; Charles E. Hoyle

doi:10.1117/12.139164

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14 January 1993 Photophysics and photochemistry of side-chain substituted liquid crystalline polyaryl cinnamates

Sangya Singh, David Creed, Charles E. Hoyle

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Proceedings Volume 1774, Nonconducting Photopolymers and Applications; (1993) https://doi.org/10.1117/12.139164
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

The synthesis and photochemistry of comb-like thermotropic liquid-crystalline (L.C.) polymers containing UV-sensitive cinnamate ester chromophores incorporated as part of the pendant groups is described. The methacrylate monomer was polymerized using AIBN as a free radical initiator. The acrylate monomer was resistant to polymerization under the same reaction conditions. The principle photochemical reactions on photolysis (313 nm) of solutions of the polymer as well as freshly cast films are photocycloaddition and photo-Fries rearrangement of the aryl cinnamate chromophore. Aggregation of chromophores was studied in films as a function of phase type at different temperatures. These results are compared with those obtained from main chain L.C. polyaryl cinnamates.

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Sangya Singh, David Creed, and Charles E. Hoyle "Photophysics and photochemistry of side-chain substituted liquid crystalline polyaryl cinnamates", Proc. SPIE 1774, Nonconducting Photopolymers and Applications, (14 January 1993); https://doi.org/10.1117/12.139164

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