The effect of a high magnetic field of 7 T in the reaction of methyl methacrylate polymerization is emphasized. The intervening magnetokinetic modifications are correlated with the system of radical initiation with benzoyl peroxide, 2,2'-azobis(2-methylpropionitrile), 4,4'-azobis(4-cyanopentanoic acid), and 1,1'-azobis(cyclohexane-1-carbonitrile). The characterization of the synthesized polymers is correlated with the reaction conditions. (C) 2004 Wiley Periodicals, Inc.