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The analytical control of some photochromic materials

I. IONIŢĂ1,* , A.-M. ALBU2,3, C. RĂDULESCU1, E. I. MOATER1, V. G. CIMPOCA1, M. A. GÎRŢU4

Affiliation

  1. Valahia University of Târgovişte, Faculty of Science, Department of Chemistry, 18-22 Unirii Bdvl., 130082, Târgovişte, România
  2. Politehnica University of Bucharest, Department of Chemistry, 149 Calea Victoriei, 010072, Bucharest, România
  3. Centre for Organic Chemistry, Romanian Academy, 202B Spl. Independenţei, 060023 Bucharest, România
  4. Ovidius University of Constanţa, Department of Physics, Bd. Mamaia 124, 900527 Constanţa, România

Abstract

In this paper we present the analytical results concerning synthesis, characterization of maleic anhydride copolymers with dicyclopentadiene (DCPD) and terpolymer with butyl-vinyl-ether (BVE)-DCPD, modified by condensative coupling reaction with azo photochrome dyes. Spectroscopic analysis (IR, UV-VIS) put into evidence on one hand the characteristic peaks to the initial materials (substrate and chromogen respectively), and on the other additional lines, showing the new polymerchromogen links. The kinetic analyse supposes the determination of the sin-anti thermal isomerization rate and the determination of isomerization rate was make through the registration of specific absorptions in the UV-VIS area. The main feature of colored polymers is their capacity (as such, or as a mixture with other polymers) to exhibit colour; chemical bonding of chromophore groups would eliminate expensive dyeing techniques, but on the other hand would prevent dye losses (the undesired phenomenon called migration). However, another interesting feature of such structures is their potential to form liquid crystals; this fact allows applications in numerous fields of high technology. Not in the least, we have to mention another set of uses, known in general as non-linear optics (NLO). Polymers have a number of desirable properties which taken together should make them materials of choice for optical devices: may be tailored by conventional synthesis methods to meet specific device requirements (transparency at particular wavelengths and stability at particular temperatures); offer many processing options toward desired device formats which should reduce the cost of active device..

Keywords

Maleic anhydride, Polymer, Azo dyes, Photochrom.

Submitted at: Sept. 1, 2008
Accepted at: Nov. 11, 2008

Citation

I. IONIŢĂ, A.-M. ALBU, C. RĂDULESCU, E. I. MOATER, V. G. CIMPOCA, M. A. GÎRŢU, The analytical control of some photochromic materials, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 11, pp. 2859-2863 (2008)