In Situ Kinetics Study of the Accelerated Aging of Poly(ethylene oxide) Using PhotoDSC - Archive ouverte HAL Access content directly
Journal Articles Journal of Physical Chemistry B Year : 2006

In Situ Kinetics Study of the Accelerated Aging of Poly(ethylene oxide) Using PhotoDSC

Abstract

PhotoDSC has been applied to follow the global kinetics of chain scissions resulting from the UV light irradiation or from the thermal degradation of a high molecular weight PEO (4 106 gâmol-1). Infrared spectroscopy, XRD measurements and rheology experiments were performed to evidence the occurrence of chain scissions. Melting energy was used as a tool to quantify the extent of the degradation. It was found that the chain scissions reaction follows a first-order kinetic law for both photo and thermal degradation. The activation energies were found identical in both cases (41 kJ mol-1), whereas the degradation rate was higher in the case of UV irradiation than in the case of thermoageing.
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Dates and versions

hal-00154707 , version 1 (14-06-2007)

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Cite

Frédéric Fraisse, Sandrine Morlat-Therias, Jean-Luc Gardette, Jean-Marie Nedelec, Mohamed Baba. In Situ Kinetics Study of the Accelerated Aging of Poly(ethylene oxide) Using PhotoDSC. Journal of Physical Chemistry B, 2006, 110 (30), pp.14678-14684. ⟨10.1021/jp061669g⟩. ⟨hal-00154707⟩
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