Some Peculiarities of Creation of Stable Polyimide - Azo Chromophore System

Authors

  • S. K. Kudaikulova Institute of Chemical Sciences of Academy of Sciences, 106 Valihanov, 480100 Almaty, Kazakhstan
  • G. I. Boiko Institute of Chemical Sciences of Academy of Sciences, 106 Valihanov, 480100 Almaty, Kazakhstan
  • I. I. Shalabaeva Institute of Chemical Sciences of Academy of Sciences, 106 Valihanov, 480100 Almaty, Kazakhstan
  • B. A. Zhubanov Institute of Chemical Sciences of Academy of Sciences, 106 Valihanov, 480100 Almaty, Kazakhstan
  • M. J.M. Abadie Montpellier University 2. S.T.L. 340095 Montpellier CDX 5 France

DOI:

https://doi.org/10.18321/ectj382

Abstract

Azo dyes: methyl orange, methyl red, congo red have been suggested as doping agents for formulation of stable soluble azo dye - polyimide (PI) system according to guest-host scheme. The dyes were added to the reactive mixture of monomers: dianhydrides of alicyclic tetracarboxylic acids and aromatic diamines. Polyimide synthesis was carried out by one step polycyclocondensation in protolytic media. Addition of azo dyes influences on the molecular weights of final PIs. In great extent they depend on the nature and  concentration of doping agent. Investigation of dependence of reduced viscosity of PI on monomers concentration, duration and temperature of synthesis, concentration of doping agent. It has been determined that addition of dyes to the reaction mixture up to definite value rises molecular weights of PIs
from 45-50 000 up to 320-330 000. The most efficient catalyst is congo red. However some functional groups of azo dyes disturb equimolarity of the reaction by interaction with one of main monomers. The colour of thus doped PIs is stable under processing and high temperatures. Stability of the azo dye - polyimide system depends on interaction of NLO agent with polyimide chain. It is suggested that congo red molecules can coordinate with carbonyl groups of polymer. PI films display solvatochromic properties.

References

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Published

2001-03-20

How to Cite

Kudaikulova, S. K., Boiko, G. I., Shalabaeva, I. I., Zhubanov, B. A., & Abadie, M. J. (2001). Some Peculiarities of Creation of Stable Polyimide - Azo Chromophore System. Eurasian Chemico-Technological Journal, 3(1), 29–35. https://doi.org/10.18321/ectj382

Issue

Vol. 3 No. 1 (2001)

Section

Articles

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