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Nonlinear optical polymers with novel benzoxazole chromophores: IV. Synthesis of maleimide–styrene and maleimide–methacrylate copolymers

✍ Scribed by Ki Hong Park; Jong Tae Lim; Sangyup Song; Mi Gyung Kwak; Chul Joo Lee; Nakjoong Kim

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
175 KB
Volume
40
Category
Article
ISSN
1381-5148

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✦ Synopsis

Four nonlinear optical maleimide copolymers were synthesized by radical copolymerization of N-phenylmaleimide and methacrylate-based or styrene-based monomer with benzoxazole chromophores, respectively. The copolymers had high glass transition temperatures of 1588C and exhibited good thermal stability. The most transparent film was prepared from a alternating copolymer (PMIBz 2) derived from N-phenylmaleimide and styrene-based NLO monomer. The second harmonic generation coefficient and electro-optical coefficient (r ) of a poled PMIBz 2 film was 45 pm / V (at 1.064 mm) and 6.1 33 pm / V (at 1.3 mm), respectively. The temporal stability of r of PMIBz 2 was superior to that of only methacrylate-based

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