Apparent Solubility Parameters from Photophysical Investigation of Copolymers with Pendent Naphthyl Chromophores

The effect of solvent on the formation of excimer from copolymers of 2-(l-naphthylacetyl)ethylacrylate (NAEA) with both acrylamide (AM) and N-vinyl pyrollidone (VP) in dilute solution was investigated. A minimum in excimer intensity was observed for each of the copolymers at approximately 2.20 x 10(4) (J/m3)0.5. It is suggested that the relatively high content of NAEA in the copolymers (between 30 and 60%) governs the overall solubility parameter of the polymer