ISSN:
1042-7147
Keywords:
crosslinked polyurethanes
;
4-nitro-4′-amino azobenzene
;
nonlinear optical polymer
;
second harmonic generation
;
liquid crystal
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A series of push-pull chromophores (R-HANB) based on 4′(N,N′-dihydroxyethyl)amino-4-nitro azobenzene has been designed and synthesized. R-HANB chromophores show a strong tendency to undergo intramolecular charge transfer and show high nonlinear optical effects. During the poling process, the trimer of hexamethylene diisocyanate reacted with R-HANB to give four various thermosetting polyurethanes simultaneously at higher temperature. The second harmonic generations (SHG) of three crosslinked polyurethane films are fairly high and stable at ambient temperature. The real-time measurement of SHG intensity vs. poling voltage indicates that orientation of chromophores is still feasible in this crosslinked system.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pat.1995.220061204
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