The Rate of Copolymerization of Styrene and Acrylonitrite in Solution

Abstract

The study on the rate of copolymerization of styreneand acrylonitrile in dimethyl for mamide solution wascarried out in batch stirred tank reactor.
The reaction at 70°C was thermally initiated byazo bisisobutyronitrile.
Experimental conditions were as follows. Totalmonomer concentration: 1-6 [g-mole/l]. Mole fractionof styrene in total monomer: 0-1 [-]. Initiatorconcentration: 0.005-0.08 [g-mole/l].
Since the rate of copolymerization in this systemhad no dependency on the first order of monomerconcentration, the rate equation was developed toinclude gel effect and chain transfer to solvent.
This equation showed a good agreement with experimentaldata. Reactivity ratio was almost constantover the range of our experimental conditions.