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Rheokinetics of free‐radical polymerization of acrylamide in an aqueous solution
Author(s) -
Kulichikhin S. G.,
Malkin A. Ya.,
Polushkina O. M.,
Kulichikhin V. G.
Publication year - 1997
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11779
Subject(s) - polymerization , oxidizing agent , monomer , acrylamide , aqueous solution , radical polymerization , viscosity , thermodynamics , materials science , kinetics , activation energy , polymer chemistry , order of reaction , reaction rate constant , chemistry , polymer , organic chemistry , composite material , physics , quantum mechanics
Abstract A method of rheokinetic analysis is applied to free‐radical polymerization of acrylamide in a water solution initiated by an oxidizing reducing system. The special feature of this system is the second‐order kinetics of the initiation stage. Theoretical analysis predicts the main effects, such as the time dependence of viscosity and the degree of polymerization, concentration influence of a monomer and an initiator, and the temperature dependence of the viscosity profile at different experimental conditions. Experimental data confirmed the idea about the second‐order reaction of initiation. Observed dependencies were close to theoretical predictions. Rate constants of different individual stages of a reaction and “apparent” values of activation energy were found and compared with published values. The possibility of solving an inverse rheokinetic problem from viscometric data was confirmed.