in the reported experiments, the foregoing polymerization reactions have been carried out at different temperatures (50-95 $degree$ ), for different periods of time (5-130 min) using different concentrations of fe**2** $plus$ , thioureadioxide, and h//2o//2 h//2o//2 concentration of 0. 005 constituted the optimal for gma and gma/aam mixtures, and 0. 02 h//2o//2 for gma/an, gma/bma and gma/styrene mixtures. increasing the concentration of gma either alone or in admixtures resulted in improved add-ons; the magnitude of this improvement relied on the nature of the monomer used along with gma. the polymerization reaction was characterized by an initial fast rate followed by a sloer one irrespective of monomer or monomer mixtures used. gma/aam mixtures produced higher add-ons than aam alone irrespective of their ratios in the mixtures, indicating activation of aam with gma. on the other hand, aam deactivated gma similar situation was encountered when styrene or acrylonitrile was used instead of aam except that the percent add-ons obtained with gma/an mixtures decreased upon raising the polymerization temperature above 80 $degree$ c. contribution of gma in the add-ons obtained with the different mixtures was also examined. 36 refs