INFLUENCE OF POLY(VINYL CHLORIDE) PHYSICAL STATE IN SOLUTION ON ITS THERMAL-DEGRADATION

The influence of the physical state of PVC in solution on the rate of its thermal dehydrochlorination was studied. It was shown that the rea rrangement of the PVC structure in solution considerably changed the r ate of its degradation irrespective of the ways used to achieve this r earrangement tan increase in its concentration or the addition of poly (alpha-olefin)s such as PE, PP, and polyisobutylene as the second iner t polymer that is thermodynamically incompatible with PVC). The rate o f PVC degradation in solution is determined by the basicity of a solve nt: the rate of PVC degradation decreases in the solvents with high ba sicity, whereas it increases in the solvents with low basicity. Equati ons adequately describing the effect of the PVC physical state on the rate of its thermal dehydrochlorination were proposed.