Abstract
The effects of β-picolinium p-chlorophenacylide on the solution polymerization of styrene initiated by α,α′-azobisisobutyronitrile (AIBN), using tetrahydrofuran (THF) as an inert solvent, were investigated at 60, 65, and 70°C. Normal kinetic features (Rp∝[AIBN]0.5 [styrene]1.0) were observed for the AIBN initiated polymerization in the absence of ylide but in presence of ylide, the Rp was proportional to [AIBN]0.33 [ylide]0.14 [styrene]0.5–1.0. The rate of polymerization (Rp) and average degree of polymerization (Pn) increased with increasing [ylide]. The energy of activation decreased in presence of ylide. The effects of polar and non polar solvents were also studied. The accelerating effect of ylide was due to the decrease in the rate of termination (Rt) with an increase in Pn of the polymers with [ylide].
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