ABSTRACT
Using light scattering and microinterference methods, the phase separation was studied in the systems based on diglycidyl ether of bisphenol A with hydroxyl- and bromo-containing derivatives of oligobutadiene, random copolymers of nonyl acrylate with acrylamide and acrylic acid, and polyurethane block copolymers of various MW and composition with limited solubility. Obtained phase diagrams were treated in the framework of Flory-Huggins (FH) theory. Thermodynamic behavior 34of polymer solutions was shown to depend on the degree of intermolecular interactions. The phase diagrams for copolymers of nonyl acrylate with 30 % and 40 % of acrylic acid were shown to be similar to the diagrams of chemically crosslinked systems and not to obey FH theory. The upper critical solution temperature was plotted against solubility parameters for a few systems.
