Radical polymerisation of ethyl acrylate in the presence of molecular oxygen

Gangi Reddy, G. ; Nagabhushanam, T. ; Venkata Rao, K. ; Santappa, M. (1982) Radical polymerisation of ethyl acrylate in the presence of molecular oxygen British Polymer Journal, 14 (3). pp. 89-94. ISSN 0007-1641

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/pi.4980...

Related URL: http://dx.doi.org/10.1002/pi.4980140302


Oxygen as a promoter of radical polymerisation of ethyl acrylate was studied in the aqueous medium. Cu2+ was chosen as the catalyst for the ascorbic acid (AA) -02 redox reaction, constituting a three component initiating system. The rate of polymerisation, Rp, was observed to increase, remain constant and then decrease with increasing [Cu2+]. Rp increased with [O2] upto ~6.5×10−4M and thereafter remained constant. [AA]>1.2×10−3M did not influence the rate. Rp always increased with monomer [M] at fixed [Cu2+], [O2] and [AA]. However, the order with respect to [M] increased with increasing [Cu2+]. The rate of polymerisation increased with ionic strength, μ and decreased with [H2SO4]. There was an initial increase in Rp followed by a decrease with increasing temperature. Conditions were identified where Rp depended only on [Cu2+] and [M] or [M] only for industrial exploitation. Kinetic chain length of the polymers obtained under various experimental conditions were determined viscometrically.

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