Pyrolysis products of poly(vinyl chloride), dioctyl phthalate and their mixture

摘要: Abstract The pyrolysis of PVC, dioctyl phthalate (DOP) and their mixture has been conducted in air inert atmosphere the products studied using thermal volatilisation analysis (TVA) subambient analysis. Gas, liquid tar fractions were separated analysed by GC-MS FTIR. A large number aromatic alkyl compounds found PVC fractions, confirming results previously reported literature. Pyrolysis presence does not change nature products, though relative amounts may be different. Oxygen-containing volatiles are formed. oxygen-containing groups formed polymer pass into as fragments split from crosslinked network. Among DOP benzene, toluene, benzaldehyde, phthalic acid, anhydride, isoalkene, unsaturated ketones alcohols most important. PVC-DOP produces, beside pure components, new originating reactions free radicals individual components. exhibits retarded dehydrochlorination during TVA experiment. This behaviour is similar to that observed this laboratory for PVC-poly(tetramethylene sebacate) blends supports idea reaction between chain carriers methylene esters.