Journal
EUROPEAN POLYMER JOURNAL
Volume 41, Issue 11, Pages 2530-2543Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2005.05.015
Keywords
PVC poly(vinyl chloride); UV-absorbers; anthraquinone derivatives; intrinsic viscosity; gel content (%)
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Anthraquinone derivatives have been prepared and investigated as photo-stabilizers for rigid PVC by measuring the extent of weight loss (%), the amount of gel formation as well as the intrinsic viscosity of the soluble fractions of the degraded polymer. The results indicated a reasonable stabilizing effect of these derivatives compared with UV-cornmercially used stabilizers. A synergistic effect is achieved when the anthraquinone derivatives are mixed with UV-absorbers in a weight ratio of 75% of investigated organic stabilizer and 25% of reference stabilizer. A probable radical mechanism is proposed to account for the stabilizing action of the organic investigated materials. (c) 2005 Elsevier Ltd. All rights reserved.
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