Matériaux composites à base de graves et de liants polymères II: Ozonisation du polyéthylène et dosage des hydropéroxydes et des péroxydes derivés |
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Authors: | B. Boutevin Y. Pietrasanta M. Taha T. Sarraf |
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Affiliation: | Laboratoire de Chimie Appliquée, Ecole Nationale Superieure de Chimie de Montpellier, 8, rue Ecole Normale, 34075 Montpellier Cedex, France |
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Abstract: | The study of the oxidation of low density polyethylene is carried out under fluidized conditions in air and ozone. Special attention is paid to the formation of peroxides and hydroperoxides. Their production is optimized according to various parameters (temperature, time, quantity of ozone, flow of the gaseous current) using an experimental design method. Peroxides and hydroperoxides are titrated by a colorimetric method using diphenylpicrylhydrazyl as reagent. A correlation between i.r. carbonyl ratio and the yield of peroxides has been established. |
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