Abstract
AbstractReactions between hydrogen chloride, HCl, and either hydrocerussite, 2PbCO3. Pb(OH)2, or an orthophthalate of lead suspended in di(2‐ethylhexyl)phthalate, DOP, at 180°C are discussed as models of what should happen during the stabilization of PVC if thermal dehydrochlorination were to yield HCl. There is a sharp contrast between the products of these model reactions and those actually found in plasticized PVC containing basic lead compounds. This is taken to show that basic lead stabilizing regimes inhibit PVC thermal dehydrochlorination, actually preventing the formation of HCl. It is proposed that these stabilizing regimes function by a free‐radical mechanism which has been called “true stabilization” for ease of reference.
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