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In aqueous solution, sodium polymethallylsulfonate (PMAS-Na) can initiate a radical polymerization of vinyl monomer which has positively charged vinyl group. In the polymerization of MMA, Michaelis-Menten equation was applicable. From the results obtained, a bimolecular initiation mechanism, involving hydrogen atom transfer, was concluded to be reasonable. The relationships between pH of the aqueous layer and conversion and between polymerization temperature and conversion were of downward bell type. By Stewart model, it was found that PMAS-Na has a very rigid conformation. This structure can be compared with a rigid tertiary structure of enzyme, and the reaction appearances of enzyme and PMAS-Na can be considered to resemble very much each other.
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Imoto et al. (1976) studied this question.
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