P-Nitrobenzyl Triphenyl Phosphonium Ylide as a chain Transfer Agent for Copolymerisation of Methyl Methacrylate with Styrene

Urvi Bhatnagar, Rita Vasishtha and A. K. Srivastava*

Chemistry Department, Harcourt Butler Technological Institute, Kanpur-208 002, India


α-α´ Azobisisobutyronitrile initiated radical copolymerisation of methyl methacrylate and styrene in presence of p-nitrobenzyl triphenyl phosphonium ylide (p-NBTPY) using dimethyl sulphoxide as an inert solvent has been investigated dilatometrically at 60±0.1ºC under nitrogen atmosphere. The ylide, p-NBTPY acts as a chain transfer agent and the (Ctr) value is 0.9. Various kinetic parameters have also been evaluated and a suitable mechanism has been proposed for the present system.


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  • Asian J. Chem. /
  •  1991 /
  •  3(4) /
  •  pp 360-366