Nonlinear optical polyurethane functionalized with a heteroaromatic thiophene ring having a tricyanovinyl group

Han Young Woo, Hong Ku Shim, Kwang Sup Lee

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Abstract

A new functionalized polyurethane structure with a thiophene ring having a tricyanovinyl group in the polymer side chain was synthesized. The molecular weight of the final polymer was determined to be Mn = 12000 and Mw/Mn = 2.04. The resulting polymer was soluble in N-methylpyrrolidinone and could be processed into good optical quality films by spin casting at ca. 100 °C. It showed no weight loss up to 266 °C in the thermogravimetric analysis and a definite glass transition at 176 °C. The second-order nonlinear optical coefficient, d33, was determined to be 51 pm V-1 from measuring the second harmonic generation (SHG) for a thin polymer film after poling treatment. The outstanding orientational stability of the aligned chromophores was observed up to about 150 °C, which originated from the rigid polymer backbone and the stabilizing function of the hydrogen bridges formed between the neighboring polyurethane chains.

Original languageEnglish
Pages (from-to)8-14
Number of pages7
JournalPolymer Journal
Volume32
Issue number1
DOIs
Publication statusPublished - 2000 Jan 1
Externally publishedYes

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ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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