THE FORMATION AND STABILITY OF MICROSCOPIC EMULSION FILMS OF AQUEOUS SOLUTIONS OF POLY (ACRYLIC ACID) AND ACRYLIC ACTD-VINYLACETATE COPOLYMERS

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Abstract
The effect of polymer volume concentration C, pH and ionic strength (NaCl concentration, CNal) of solution, polymer molecular mass, acetate groups' content in a polymer chain, and ethanol concentration on the stability of microscopic emulsion films (MEF) stabilized with the adsorption layers of poly(acrylic acid) (PAA) and acrylic acid-vinylacetate copolymers (PAA-VA) has been studied. The kinetics of MEF thinning under the conditions when two heptane drops in a polymer solution are brought into contact and pressed with a permanent force has been studied. The free energy ▵ F of interaction in the film has been evaluated on the basis of measuring the film thickness Hf by photometry and determining the film profile in the Plateau region.