Fine structure of polymeric compositions based on latexes modified by water-soluble phthalocyanine

Abstract

The data of the atomic force microscopy of films and coatings based on the water-soluble polymer binders modified with water-dispersion phthalocyanine (WDP) are considered. In the formation of films from a latex polymer with a low glass-transition point (−17°C) and both nonmodified and phthalocyanine-modified latex particles completely coalesce, which manifests in the high smoothness of the surface and the WDP distribution over the whole volume of the polymer. The surface roughness of an elastic polymer with a glass-transition point below 25°C is observed in the case of polyalkyl (meth)acrylate films that contain WDP. Here, a continuous network of latex particles that contact each other is clearly seen. This type of structure appears at a dispersion-phase WDP concentration of up to 10−3 to 10−2 mol/l when the fluoride is homogeneously distributed in the latex polymer. During the film formation, WDP is localized on the particle surfaces due to the interaction between its amine groups and carboxyl groups of the polymer surface.