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ACTIVATION OF TEXTILE POLYMERS |
Leader of the group : Baranov Alexandr V. (on the right)Senior scientist, Institute of Solution Chemistry; Ph.D. 1988, Ivanovo Institute of Chemical Technology Staff :Yakunin Nikolai A. (in the center)Senior scientist, Institute of Solution Chemistry; Ph.D. 1989, Institute of Chemical Technology Prusova Svetlana M. (in the center)Senior scientist, Instiute of Solution Chemistry; Ph.D. 1990, Institute of Chemical Technology Dymnikova Natalija M. (on the left)Research associate, Institute of Solution Chemistry; Ph.D. 1986, Ivanovo Institute of Chemical Technology |
The problems of mass transfer of dyes in textile polymeric substrates are amongst the central problems in the theory of dyeing. The rate of diffusion of dye molecules into a fiber determines the duration of the dyeing process and itself is determined by numerous factors, one of the most important of them being the nature of intensifying agent applied.
At present, the choice of a particular intensifying agent is usually grounded on experimental tests. Further, there are no common views on the mechanisms of polymer activation by intensifying agents. One of the main reasons for this deficiency is the absence of a diffusion model which would have taken into account directly the parameters of solvation both of the dye and of the polymer. Known diffusion models, being at root of a physical nature, are invalid for the estimation of the influence of the chemical nature of intensifying agent on the mechanisms of dyeing of textile materials.
The research of this scientific group is directed at the development of a diffusion model based on the molecular kinetics concept for an elementary act of transmission translocation of diffusing particles. Thermodynamic characteristics of the interactions taking place in the three component system "textile polymer - dye - intensifying agent" are also involved.
The creation of such a model will permit forecasting of the efficiency of any conceivable substance as an intensifying agent for any dyeing process. The model (being applied to any particular dyeing system) is expected to give more precise knowledge of the mechanisms of dye diffusion into plasticized polymers by the estimation of the impact of the intensifying agent upon both the dye and the polymer.
Attention is concentrated upon the following issues:
Investigation of the mechanisms of cellulose
and PET interactions with different solvents, and the mechanisms of plasticizing these
polymers;
Research into the character of the
distribution of diffusing substances inside the amorphous regions of textile fiber
belonging to different structural levels;
Determination of the thermodynamic
parameters of dye solvation and of dissolution in pure solvents (including the melts of
carboxylic acid amides) and in the solutions of inorganic salts.
1. Baranov, A.V., Moryganov, A.P., and Melnikov, B.N. The estimation of polymer - solvent intermolecular interaction energies influence on the shrinkage of PET-fiber
. Zhurnal prikladnoi khimii (J. Applied Chemistry), Vol.58 , No 5, (1985), P.1181-1183.