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High Performance Polymers
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New Soluble Polyimides Containing the Hydroxylic Group. II: Polymers Substituted with Disperse Red 1

Ewa Schab-Balcerzak

Danuta Sek

Bozena Jarzabek

Centre of Polymer Chemistry, Polish Academy of Sciences, 41-800 Zabrze, Poland

Yuriy Zakrevskyy

Fraunhofer Institute for Applied Polymer Research, D-14476 Golm, Germany

Joachim Stumpe

Fraunhofer Institute for Applied Polymer Research, D-14476 Golm, GermanyJoachim.Stumpe{at}iap.fraunhofer.de

A series of aromatic polyimides synthesized from various diamidedianhydrides and 2,4-diamino-phenol dihydrochloride were substituted with 4-[N-ethyl-N-(2-hydroxyethyI)Iamino-4'-nitro-azobenzene (Disperse Red 1) via the Mitsunobu reaction. The content of the chromophore in the polyimides has been detenrnined by UV-Vis spectroscopy. The influence of the polyimide structure on the ability for the introduction of the chromophore into the polymers was investigated. Different conditions of the Mitsunobu reaction have enabled the synthesis of polyimides with various contents of DR 1. The induction of optical anisotropy in films of the photochromic polymers was studied by irradiating with the linearly polarized light of an Ar+ laser (488 nm). A dichroism up to 0.2 was induced depending on the content of the push-pull substituted azobenzene side group in these polyimides.

Key Words: Thermostable polymers • polyimides • poly(o-hydroxyimide)s • poly(amideimide)s • functionalized polyimides • Mitsunobu reaction • photo-orientation • photo-induced dichroism • azobenzene

High Performance Polymers, Vol. 16, No. 4, 585-596 (2004)
DOI: 10.1177/0954008304041755
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