On suspension polymerization of vinyl chloride. Polymerization of vinyl chloride in the presence of epoxidized oil

A study has been made on the suspension polymerization of vinyl chloride in the presence of epoxidized cottonseed oil. Inclusion of the additive into the polymer chain was proved by i.r. spectrophotometry. The effects of epoxidized cottonseed oil on polymerization rate and K-value were slight, but plasticizer absorption by the polymer was reduced. Thermogravimetric curves of the product have been obtained, and show that epoxidized cottonseed oil improves the thermostability of the polymer.