Abstract
A considerable increase in induction times was observed when Cd stearate and pentaerythritol were used together as stabilizers in the thermal degradation of PVC. Kinetic calculations which assume the formation of a chelate formed from pentaerythritol and Cd stearate show that this chelation reduces the ionic strength of the system and thereby increases the rate of replacement of the allyl-activated chlorine atoms in PVC. The increase in induction times is due to the reduction of ionic strength by this chelation.
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