ABSTRACT:The polymerization and crosslinking reaction mechanisms were studied for the emulsion polymerization of chloroprene. The dependence of volume of monomer droplet, surface-tension and crosslinking density on conversion was confirmed to be corresponding to the Harkins and Smith-Ewart models. Crosslinking densities were estimated from swelling ratios of the gel polymers prepared at various temperatures in the absence of a chain transfer reagent. The ratios of the rate constant of the propagation to the crosslinking Kwere calculated to be 2.0 x 10-4 , 7.1 X 10-4 , and 9.9 X 10-4 at 10, 40, and 55°C, respectively. The difference between activation energies of these two mechanisms was 27.8 kJ mol-1 . The proportions of polymer in the growing polymer particles during the existence of monomer droplets B' were also caluculated to be 0.47, 0.45, and 0.42, at each temperature.

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