Studies on Polymerization of Vinyl Chloride
XIII. Polymerization in iso-Propyl Chloride and Chain Transfer of Polymer
1959 Volume 16 Issue 170 Pages 349-352
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1959 Volume 16 Issue 170 Pages 349-352
The polymerization of vinyl chloride in iso-propyl chloride was studied at 50°C and 60°C with α, α′-azobisisobutylonitril used as initiator. The rate of polymerization is proportional to the [I] 0.5 and [M] 1.1. The chain transfer constant of the solvent obtained from the plot of 1/P-Rp/AM2 against S/M is 7.0×10-4 (50°C) and 8.2×10-4 (60°C). If iso-propyl chloride is thought as a model of polyvinyl chloride, the chain transfer of PVC nearly equalled the monomer in largeness. The calculated branch content per polymer molecule are about 10 at 94% conversion. This content is similer to the value, 10-20, which Bier, Krämer and Cotoman obtained by measuring the infrared absorption.
