Structure formation and complexation behavior of thermally sensitive vinylcaprolactam copolymers with vinylpyrrolidone or crotonic acid in aqueous solutions

For vinylcaprolactam copolymers with vinylpyrrolidone and crotonic acid, th e nanosecond relaxation times which characterize intramolecular mobility we re measured in aqueous solutions by the luminescence depolarization techniq ue under heating or the addition of structuring agents: phenol, sodium dode cyl sulfate, and NaCl. Under the same conditions, luminescence techniques w ere used to study the interaction of these copolymers with low-molecular-ma ss cations (Acridine Orange and Auramine) or anions (magnesium 8-anilino-1- naphthalenesulfonate and sodium dodecyl sulfate).