A comparison of the absolute reactivity of vinyl monomers. II

Elayaperumal, P. ; Balakrishnan, T. ; Santappa, M. (1982) A comparison of the absolute reactivity of vinyl monomers. II Journal of the Madras University, 46 . pp. 58-73. ISSN 0368-3192

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The kinetics of polymerization of acrylamide (AM), acrylic acid (AA) and acrylonitrile (AN) initiated by the redox system, Mu3+ - isobutyric acid (IBA), was studied in the temperature range 30 - 50°C. Acrylamide and acrylic acid polymerization kinetics followed the same mechanism, viz., initiation by primary radical and termination by both Mn8+ ion and Mn3+ - isobutyric acid (intermediate) complex. But in acrylonitrile polymerization, termination by Mn3+ ion alone was observed. Also the complex termination step was found to be absent in acrylic acid polymcrization when the [Mn3t] was kept very low. The rate coefficients kp / ku and kJ / ko were related to the polymer radical reactivity and monomer reactivity respectively. It was found that while kp / ko follows the order AN > AA, the kl / ko follows the reverse order.

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