Relaxation phenomena in latex polymers modified with water-soluble phthalocyanine

The relaxation properties of polymer composites based on latex styrene-alkyl methacrylate polymers and water-soluble 2,3,9,10,16,17,23,24-octa[(3,5-biscarboxy)-phenoxy]phthalocyanine are studied in the temperature range from −150 to +250°C. Characteristic mechanical loss maxima are observed on the inner friction spectra of unmodified and modified polymers corresponding to various patterns of intermolecular mobility and local and segmental types of intermolecular interactions. The modification of the polymers is accompanied by decreases in their glass-transition temperatures. This effect may be explained by a decrease in the intermolecular interactions of copolymer units in the presence of phthalocyanine.