Two Novel Crosslinked Poled Polymers with Stable Second-Order Nonlinear Optical Properties

Abstract

Abstract: Two kinds of crosslinked polymers, containing 4-( 4'-nitro-phenylazo) aniline chromophore groups were synthesized. Crosslinked polyacrylate was synthesized by polymerization of DR-19 diacrylate, whereas crosslinked polyurethane was obtained by the reaction between(β-hydroxyl propyl acrylate-DR-1 methacrylate)copolymer and phenol capped isocyanate terminated DR-19.The crosslinked polyacrylate and the crosslinked polyurethane exhibit glass transition temperatures at 125℃ and 160℃ respectively.Thin and transparent poled films of both crosslinked polymers were prepared by spin-coating, followed by thermal curing and corona poling at 160℃ for 1 h. The second-order nonlinear optical properties of the poled films were studied by visible light absorbance measurement according to one dimensional rigid oriented gas model.Along term stability of the dipole alignment at 140℃ for the crosslinked polyurethane was demonstrated.

Key words: Crosslinked polymer, Nonlinear optical material, Polyurethane, Polyacrylate, 4 -(4'-Nitrophenylazo)phenylamine

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HUANG Xu-Dong, GUO Jun-Shi, XIE Hong-Quan. Two Novel Crosslinked Poled Polymers with Stable Second-Order Nonlinear Optical Properties[J]. Chem. J. Chinese Universities, 1995, 16(12): 1951.

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Two Novel Crosslinked Poled Polymers with Stable Second-Order Nonlinear Optical Properties

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