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Título

Pyrolysis kinetics of ethylene-propylene (EPM) and ethylene-propylene-diene (EPDM)

Autor Perejón, Antonio ; Sánchez-Jiménez, P.E. ; Gil-González, Eva; Pérez-Maqueda, Luis A. ; Criado Luque, J.M.
Palabras clave Thermal degradation
Kinetic model
Random scission
EPDM
Fecha de publicación 2013
EditorElsevier
Citación Polymer Degradation and Stability 98: 1571- 1577 (2013)
ResumenThe thermal degradation kinetics of several ethylene-propylene copolymers (EPM) and ethylene-propylene-diene terpolymers (EPDM), with different chemical compositions, have been studied by means of the combined kinetic analysis. Until now, attempts to establish the kinetic model for the process have been unsuccessful and previous reports suggest that a model other than a conventional nth order might be responsible. Here, a random scission kinetic model, based on the breakage and evaporation of cleavaged fragments, is found to describe the degradation of all compositions studied. The suitability of the kinetic parameters resulting from the analysis has been asserted by successfully reconstructing the experimental curves. Additionally, it has been shown that the activation energy for the pyrolysis of the EPM copolymers decreases by increasing the propylene content. An explanation for this behavior is given. A low dependence of the EPDM chemical composition on the activation energy for the pyrolysis has been reported, although the thermal stability is influenced by the composition of the diene used. © 2013 Elsevier Ltd. All rights reserved.
URI http://hdl.handle.net/10261/97280
DOI10.1016/j.polymdegradstab.2013.06.029
Identificadoresdoi: 10.1016/j.polymdegradstab.2013.06.029
issn: 0141-3910
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