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Characterization of polyethylene decomposition reactions using the TG curve

Abstract: Pyrolysis models represent the fundamental mechanism of fire spread modelling, and are also important tools for assessing the flammability properties of materials. Within these models the reaction rates of materials can be characterized by a set of parameters such as the preexponential factor (A), the energy of activation (E) and the reaction mechanism f(a). To obtain automatically a reaction scheme we use in this paper the change in mass loss rate during pyrolysis. This is possible by hypothesizing that the polymer mass loss rate is a chain of stable successive processes characterized by a constant mass loss rate. Once the reaction scheme is fixed, we suppose Arrhenius-like behaviour obtaining the kinetic triplet for each reaction step; the apparent activation energy, the pre-exponential factor and the global reaction mechanism. The interpretation was applied to thermo-oxidation and decomposition of lineal low-density polyethylene performed by simultaneous thermal analysis.

 Congreso: International Conference on Chemical Engineering and Advanced Materials: CEAM Vitural Forum (5ª : 2013)

 Fuente: International Review of Chemical Engineering, 2014, 6(1), 77-82

Editorial: Praise Worthy Prize

 Fecha de publicación: 01/01/2014

Nº de páginas: 6

Tipo de publicación: Artículo de Revista

ISSN: 2035-1755,2035-1763

Proyecto español: BIA2012-37890

Autores/as

EDUARDO PUENTE GONZALEZ

MARIANO LAZARO URRUTIA