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Environmental degradation of a novel ethylene-propylene copolymer in thick sheets |
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| Authors: | R Gallo C Castiglioni F Severini F Quasso |
| Institution: | a Dipartimento di Chimica Industriale e Ingegneria dei Materiali, Università di Messina, Salita Sperone, 98166 S. Agata di Messina, Italy b Dipartimento di Chimica, Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milan, Italy c Assessorato Ambiente, Provincia Regionale di Messina, Via S. Cecilia is. 105, 98100 Messina, Italy d Dipartimento di Fisica and INFM, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milan, Italy |
| Abstract: | The outdoor ageing of a commercial ethylene-propylene copolymer (Adflex) is investigated. Different techniques (infrared spectroscopy, thermal analysis, scanning electron microscopy, mechanical tests and positron annihilation lifetime spectroscopy) are used in order to obtain a comprehensive view of the modifications occurring during the environmental ageing of thick sheets of this copolymer. The degradation of the material is ascribed to a morphology variation, arising from the separation of amorphous oxidised copolymers initially dispersed in the bulk of the material. Weathering process takes places with increase of the bulk density of the sample. |
| Keywords: | Infrared spectroscopy Thermal analysis Ethylene-propylene copolymer Environmental degradation Positron annihilation |
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