Role of the structural-rheological state of poly(meth)acrylate solutions in their soaking into capillary-porous bodies

We have investigated the influence of the structural-rheological state of solutions of poly(meth)acryl copolymers on the rate of their capillary rise and the uniformity of the polymer distribution in the bulk of porous bodies -- models of monuments of art made of ceramics, terra-cotta, loessial and lime plaster, and concrete. It has been found that in the region of concentrations corresponding to the transition of poly(meth)acrylate solutions from the viscous-Newtonian to the structural-viscous rheological state there is a sharp decrease in the rate of capillary rise of solutions into clay, chalk, and cement-sand specimens. A worsening of the uniformity of the polymer distribution over the height of the porous specimens, a decrease in their surface wetting with copolymer solutions, and a decrease in the value of the polymer adsorption on the filler surface are also observed.[PUBLICATION ABSTRACT]