Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

Aqueous thermal polymerization of acrylonitrile (AN) initiated by peroxomonosulphate (HSO₅^-, PMS)-thiolactic acid (TLA) and PMS-thiomalic acid (TMA) redox systems has been carried out in the temperature range 30-50 °C. The effect of concentration of monomer, initiator, reducing agent, H⁺, and ionic strength on rate of polymerization, R_p, has been investigated under deaerated conditions. The R_p has been found to depend on, R_p ~ [AN]₀^1.5 [PMS]^0.5 [TLA]^0.5 in PMS-TLA system and, R_p ~ [AN]₀^2.0 [PMS]^1.0 [TMA]⁰ in PMS-TMA system. The degree of polymerization (X_n) values and thermodynamic parameters have been evaluated. Suitable reaction scheme has been proposed and expressions for R_p and X_n have been obtained.