Kinetics of Cyclopolymerization of N,N′-Methylenebisacrylamide Initiated by Redox Couples with Mn(III). Part III |
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| Authors: | S Ratnasabapathy N Marisami S P Manickam K Venkatarao N R Subbaratnam |
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| Institution: | 1. Arulmigu Palani Andavar College of Arts and Culture , Palani, 624602, India;2. Department of Polymer Science , University of Madras , Madras, 600025, India;3. Department of Physical Chemistry , Madurai Kamarj University , Madurai, 625021, India |
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| Abstract: | Redox-initiated free-radical cyclopolymerization of the nonconjugated divinyl monomer N,N′-methylenebisacrylamide was studied at 25–40°C, involving trisacetatomanganese(III) dihydrate as oxidant with four different reductants, methyl ethyl ketone (2-butanone), cyanoacetic acid, malic acid, and thiomalic acid. While the general mechanistic sequence is the same, the modes of termination are different in these cases. Because the reactivities of the different free radicals from the four redox pairs are different, the kinetic order with respect to the monomer, oxidant, and reductant differ considerably in magnitude. The kinetic and thermodynamic parameters were calculated. |
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