摘要
In the present paper a model equation for calculating the radical desorption rate constant,k<sub>0</sub>,in the emulsion polymerization of vinyl acetate was suggested and the various parameters forevaluating k<sub>0</sub> were determined.Effects of reaction temperature,emulsifier concentration,initiator con-centration,monomer conversion and phase ratio on k<sub>0</sub> were studied.It indicates that the desorptionof radicals from latex particles to aqueous phase must be taken into account in the modelling ofemulsion polymerization for the monomers with higher hydrophilicity such as vinyl acetate.
In the present paper a model equation for calculating the radical desorption rate constant, ka, in the emulsion polymerization of vinyl acetate was suggested and the various parameters for evaluating ka were determined. Effects of reaction temperature, emulsifier concentration, initiator concentration, monomer conversion and phase ratio on k0 were studied. It indicates that the desorption of radicals from latex particles to aqueous phase must be taken into account in the modelling of emulsion polymerization for the monomers with higher hydrophilicity such as vinyl acetate.
基金
Supported by the National Natural Science Foundation of China
