Aqueous Polymerization on Clay Surface. 2. The Polymerization of Methyl Methacrylate on Hydrogen Bentonite: Effect of Monomer Concentration and Temperature |
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| Authors: | S. Talapatra S. C. Guhaniyogi S. K. Chakravarti |
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| Affiliation: | 1. Department of Chemistry , North Bengal University , Raja Rammohanpur, 734430, India;2. Department of Chemistry , North Bengal University , Raja Rammohanpur, 734430, India;3. Research Centre , Indian Petrochemicals Corporation Limited , Baroda, 391 346, India |
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| Abstract: | ![]()
Aqueous free radical polymerizations of methyl methacrylate with the hydrogen bentonite/ethanol system have been accomplished with less transfer to monomer in spite of high monomer concentrations and temperature. The overall initial rate has a first-order dependence on monomer. It is proposed that initiation does not occur in the aqueous phase. The apparent activation energy of 15 kcal/mol corroborates a twofold increase in rate for a 10°C rise in temperature. The frequency of bimolecular termination is quite small as is evident from kp 2 /kt, values at various temperatures. |
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