Poly[N‐(2‐hydroxypropyl)methacrylamide]. IV. Heterogeneous polymerization

Abstract

AbstractKinetics of radical heterogeneous polymerization of N‐(2‐hydroxypropyl)methacrylamide was studied in acetone at 55°C. The values of reaction order with respect to the monomer (1.6) and to the initiator (0.5) indicate a bimolecular termination and degradative transfer during the chain growth. The over‐all rate constant of polymerization was found to be 5.6.10‐4. Addition of a small amount of a solvent (methanol) to the polymerization mixture led to an increased polymerization rate and increased molecular weight of the resulting polymer, but a higher amount of the solvent brought about a decrease of both characteristics. The Occurence of maxima on the dependences of Rp, as well as M̄w on the monomer concentration was interpreted in terms of the classical Bamford and Jenkins theory.