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

Han Young Woo; Hong Ku Shim; Kwang Sup Lee

doi:10.1295/polymj.32.8

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

Han Young Woo, Hong Ku Shim, Kwang Sup Lee

Research output: Contribution to journal › Article › peer-review

50 Citations (Scopus)

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 M_n = 12000 and M_w/M_n = 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 language	English
Pages (from-to)	8-14
Number of pages	7
Journal	Polymer Journal
Volume	32
Issue number	1
DOIs	https://doi.org/10.1295/polymj.32.8
Publication status	Published - 2000
Externally published	Yes

ASJC Scopus subject areas

Polymers and Plastics
Materials Chemistry

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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.",

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

Abstract

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