De Beer, Jacques A.Focke, Walter Wilhelm2019-09-102019-09-102019-04De Beer, J.A. & Focke, W.W. 2019, 'Oxidative degradation of polyolefins in the presence of cupric and ferric stearate additives', Macromolecular Symposia, vol. 384, no. 1, art. 1800149, pp. 1-7.1022-1360 (print)1521-3900 (online)10.1002/masy.201800149http://hdl.handle.net/2263/71313Ferric stearate‐ and cupric stearate‐containing masterbatches were successfully prepared by reactive extrusion compounding in a twin screw compounder. These prodegradant additives were formed by the reaction of the corresponding hydrated sulfate salts with calcium stearate in the polyethylene melt. High density polyethylene (HDPE) and polypropylene (PP) films containing these metal‐based additives showed accelerated ageing in both QUV artificial UV ageing as well as oven ageing at 63 °C.en© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the pre-peer reviewed version of the following article : 'Oxidative degradation of polyolefins in the presence of cupric and ferric stearate additives', Macromolecular Symposia, vol. 384, no. 1, art. 1800149, pp. 1-7, 2019, doi : 10.1002/masy.201800149. The definite version is available at : https://onlinelibrary.wiley.com/journal/15213900.AgeingCompoundingDegradationPolyethylenePoly(propylene) (PP)High density polyethylene (HDPE)Oxidative degradationFerric stearate additivesCupric stearate additivesPostprint Article