Abstract
A study was made of kinetic relations of hydrogen chloride liberation from PVC and the formation of peroxide compounds in the polymer during thermal decomposition of PVC in the presence of ozone. Rate constants of corresponding processes were determined. Ozone markedly intensifies the separation of HCl from PVC macromolecules; gross dehydrochlorination of the polymer in ozone mainly takes place by the statistical elimination of HCl, the process of forming polyconjugated systems being practically fully inhibited. By the action of ozone on PVC O 3 rapidly interacts with internal and terminal double bonds 〉CC〈 and slow reaction takes place with saturated polymer structures. It was shown that labile groups containing oxygen, formed during the attack of saturated macromolecular sections of PVC by ozone reduce polymer stability to a greater extent than structures formed during the reaction of O 3 with 〉CC〈 bonds.
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