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Interpenetrating polymer networks with stable second order nonlinear optical properties

✍ Scribed by Hong-Quan Xie; Xu-Dong Huang; Jun-Shi Guo

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
473 KB
Volume
7
Category
Article
ISSN
1042-7147

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✦ Synopsis

Interpenetrating polymer networks (IPNs) based on polyurethane and polyacylate-containing 4-(4'-nitrophenylazo) aniline chromophore groups were synthesized and characterized by infrared spectra, gel content and differential scanning calorimet y . Thin, transparent films of the IPNs were prepared by spin-coating, followed by thermal curing and corona poling. The poled IPN film shows very good optical properties and exhibits only one glass transition temperature. The second-order nonlinear optical (NLO) properties of the poled film were studied by visible light absorbance measurement according to onedimensional rigid oriented gas model. The second-order nonlinear optical polarizability can reach lop7 e.s.u. The poled IPN film of defined composition showed a good temporal stability of NLO properties at 120Β°C for more than 160 hr.

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