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Citation: Yang Chuncai, Wang Huabin, Jing Xiabin, Wang Fosong, Li Jia, Wang Shumei, Xing Rubin. Orientaion and Relaxation in a Polyisocyanate-Crosslinked Second Order Nonlinear Optical Polymer[J]. Chinese Journal of Applied Chemistry, ;1995, 12(3): 23-27. shu

Orientaion and Relaxation in a Polyisocyanate-Crosslinked Second Order Nonlinear Optical Polymer

1.
Polymer Physics Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
2.
Changchun Institute of Physics, Chinese Academy of Scienc, Changchun 130022

Received Date: 18 August 1994
Revised Date: 17 January 1995

The orientation and relaxation of a crosslinked and poled polymer based on the re-action of glycerin monoether of 4-[(p-nitrophenyl)azo]phenol with biuret of hexamethylene diisocyanate have been studied by UV-Vis spectra and second harmonic generation(SHG) techniques. Second order nonlinear susceptibility χ², second harmonic coefficient d₃₃ and electro-optic coefficient γ₃₃ were determined. The d₃₃ of the crosslinked and poled polymer was in the range of 10^-8~10^-7esu and kept constant for a period of 100h after poling and crosslinking.
- crosslinked polymer,
- second harmonic generation,
- second harmonic coefficient,
- electro-optic coefficient
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