FLUORESCENCE STUDIES OF THE DYNAMIC BEHAVIOR OF POLY(DIMETHYLACRYLAMIDE) AND ITS COMPLEX WITH POLY(METHACRYLIC ACID) IN DILUTE-SOLUTION

Fluorescence techniques, including quenching and anisotropy measuremen ts, have been used to study the dynamic behavior of poly(N,N-dimethyla crylamide) (PDMAC) in both dilute methanolic and aqueous solution, res pectively. These studies indicate that the polymer exists as a flexibl e and relatively open coil in aqueous media whose behavior is largely unaffected by changes in pH. Preliminary time-resolved anisotropy meas urements reveal that complexation with poly(methacrylic acid) (PMAA) p roduces a relatively rigid species in which the segmental mobility of the PDMAC is dramatically reduced.