Determination of the electro-optical coefficient r33 and refractive index of para-substituted poly(γ-benzyl-l-glutamate) derivatives

Dong Hoon Choi, Robert Zand

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The electro-optical coefficient r33 and refractive index of films of poly(γ-benzyl-l-glutamate) and the p-nitro, p-fluoro and p-trifluoromethyl derivatives were determined as a way to assess the non-linear optical behaviour of these organic polymers. The p-fluoro-γ-benzyl and p-trifluoromethyl-γ-benzyl ester polymers are new materials synthesized for this study. The electro-optical coefficient r33 = 5.2 × 10-2 pm V-1 for the unsubstituted polymer, 13.9 × 10-2 pm V-1 for the p-nitro polymer, 3.0 × 102 pm V-1 for the p-fluoro polymer, and 1.6 × 10-2 pm V-1 for the p-trifluoromethyl polymer. The refractive indices, at a wavelength of 488 nm, of films of the polymer were determined to be 1.60, 1.61, 1.59, and 1.70, respectively, for the unsubstituted polymer and the p-nitro, p-fluoro, and p-trifluoromethyl derivatives. The frequency dependence of the dielectric constant, from 10 kHz to 4 MHz, for each of the polymer films was also determined. The waveguiding and other properties of each of the polymers were assessed in terms of the polymer structure.

Original languageEnglish
Pages (from-to)23-29
Number of pages7
Issue number1
Publication statusPublished - 1994 Jan 1
Externally publishedYes


ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry

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