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Photopolymers for non‐linear optics: Design and synthesis of a polymer containing styrene‐terminated tolane chromophores and its stabilization in an oriented configuration by photocrosslinking
Author(s) -
Godt Adelheid,
Fréchet Jean M. J.,
Beecher Jody E.,
Willand Craig S.
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021960108
Subject(s) - chromophore , photopolymer , materials science , polymer , moiety , photoinitiator , polyurethane , polymer chemistry , styrene , photochemistry , chemistry , composite material , organic chemistry , polymerization , monomer , copolymer
A new photocrosslinkable polymer designed for application in second harmonic generation has been prepared and tested for frequency doubling of IR lasers. The polymer is based on a colorless polyurethane with pendant tolane nonlinear optical chromophores that carry a polymerizable styrene moiety at their extremities. Photocrosslinking is achieved by irradiation of films containing a small amount of a bleachable radical photoinitiator. The effect of photoinduced radical crosslinking on the mobility of the chromophores has been studied by recording the intensity of the frequency doubled light, generated by a poled sample, with increasing temperature. As expected, photocrosslinking leads to NLO materials with highly stable chromophore orientation.