Isomerization Behavior of Aromatic Azo Chromophores Bound to Semicrystalline Polymer Films

Document Type

Article

Publication Date

9-19-2001

Department

Polymers and High Performance Materials

Abstract

The cis-trans isomerization of azo chromophores covalently bound to semicrystalline polymer films was investigated. Various azo chromophores were introduced onto the functionalized semicrystalline polymer films by a chemical transformation reaction and their isomerization behavior was investigated by UV-visible spectroscopy and a contact-angle goniometer. The thermal Z --> E isomerization rate of the azo moiety covalently bound to low-density polyethylene (LDPE) and polypropylene (PP) films was determined. The rate of thermal isomerization was also compared between amorphous and semicrystalline polymer films bearing azo chromophores. The effect of the intramolecular steric factor and the nature of chromophores was studied on the thermal isomerization rate of the polymer films. (C) 2001 John Wiley & Sons, Inc.

Publication Title

Journal of Applied Polymer Science

Volume

81

Issue

12

First Page

2923

Last Page

2928

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