RADIATION-INDUCED COPOLYMERIZATION OF N-V INYLPYRROLIDONE WITH AMINOALKYL ACRYLATES AND THE MOLECULAR CHARACTERISTICS OF COPOLYMERS

Copolymers of N-vinylpyrrolidone with 2-(N,N-dimethylamino)methyl and 2-(N,N-diethylamino)ethyl methacrylates and their quaternary ammonium salts, obtained by reacting the amines with RX, where R=CnH2n+1 (n = 2 - 10), X = Cl, I, were synthesized using radiation-induced polymeriza tion and polymeranalogous reactions. Molecular and conformational char acteristics of the synthesized copolymers were studied using light sca ttering and viscometry. As the length of an alkyl radical is increased to n = 6, the intramolecular interactions are disbalanced and electro static repulsion is suppressed, which results in the contraction of ma cromolecular coil. As a result, second virial coefficient, intrinsic v iscosity, and macromolecular dimensions decrease. At n > 6, steric int eractions between the side groups give rise to a slight increase in in trinsic viscosity and macromolecular dimensions, whereas the second vi rial coefficient continues to decrease.