Discoloration of polymers by phenolic antioxidants

0188859 - UMCH-V 20023124 RIV GB eng J - Journal Article
Pospíšil, Jan - Habicher, W. D. - Pilař, Jan - Nešpůrek, Stanislav - Kuthan, J. - Piringer, G. O. - Zweifel, H.
Discoloration of polymers by phenolic antioxidants.
Polymer Degradation and Stability. Roč. 77, č. 3 (2002), s. 531-538. ISSN 0141-3910. E-ISSN 1873-2321
R&D Projects: GA ČR GA202/01/0518; GA ČR GA203/02/1243
Institutional research plan: CEZ:AV0Z4050913
Keywords : polymer discoloration * phenolic antioxidant * antioxidant transformation
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 1.145, year: 2002

Part of colour development in aged polyolefins stabilized with phenolic antioxidants can be attributed to the formation of conjugated diene compounds, arising as a consequence of sacrificial trapping of alkylperoxy radicals by phenolics. The discoloration depends on the structure and concentration of the phenol transformation products. Peroxycyclohexadienones are formed transiently in low concentrations and themselves do not discolour the polymer matrix.
Permanent Link: http://hdl.handle.net/11104/0084741