THE EFFECT OF POLYMER DISPERSION IMPREGNATION ON THE MECHANICAL AND FILLING PROPERTIES OF LEATHER BINDINGS OF THE ANCIENT MATENADARAN BOOKS
Keywords:
impregnation, filling, polymer dispersion, high molecular compounds, topographical areas, film-forming agentAbstract
The treatment of leather with high molecular compounds (HMC) aims to improve its physical and mechanical properties, particularly in the topographical areas of the leather. Therefore, the main issue in leather impregnation with HMC is considered to be uncovering the hidden mechanism of changes in the property indicators of the leather.
Experimental materials for leather impregnation with different HMCs mainly reflect the changes in the physical and mechanical properties of the leather, without corresponding analysis to compare and confirm the interrelationship between the obtained results and the impregnation method and the properties of the materials used. Meanwhile, considering the diversity of HMCs and their application methods, it is necessary to establish selection principles for leather impregnation, aiming to modify its mechanical properties in the desired direction. Therefore, there is a need to establish the interrelationship between the mechanical properties of HMCs and the leathers impregrated with them, as well as to reveal the unique properties of polymer aqueous dispersions on which the mechanical properties of the leathers depend.
For conducting these studies, it is first necessary to consider the main factors determining the unique mechanical properties of the leather. This allows, on the one hand, to simplify the problem by obtaining more or less unambiguous dependence, and on the other hand, based on the general mechanical theory of high molecular polymers, to find the interrelationship between the leather and the impregnating polymer. In addition, it is known that ancient leather was tanned with vegetable tannins, which bind with the collagen of rawhide not through all functional groups, but specifically with the amino groups of the protein. Therefore, tannin-tanned leather does not have uniformity in all topographical areas.
Impregnation and filling of leather with polymer dispersions will eliminate defects and improve the physical and mechanical properties.
