Emulsifier-free emulsion polymerization of acrylonitrile catalyzed by Co(II)‎glycine chelate complex

الملخص EN

The aqueous emulsion polymerization of acrylonitrile was studied using potassium monopersulfate as initiator in the presence of various Co (II) salts and amino acids in absence of an added emulsifier.

The Co (II) salts and amino acids alone have a retarding effect on the polymerization reaction, while their complexes show a catalytic effect.

From the comparative data, the CoCl2 / glycine chelate complex was selected for a detailed kinetic and spectrometric study of polymerization in atmospheric oxygen.

The apparent activation energy was found to be 1.38 × 104 J / mol.

The average molecular weights of the purified polymer were determined by GPC (3.3 × 104–6.8 × 104) and by viscosity (3.8 × 104–7.9 × 104) methods.

From the kinetic and spectrophotometric studies, the mechanism of KHSO5 decomposition and initiation of polymerization was suggested.