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Title: Investigation of the effects of thermal, oxidative and irradiation treatments on the behavior of poly(ethylene glycol) as a phase change material in thermal energy storage systems
Authors: Jouhara, H
Ajji, Z
Keywords: PEG 2000;Phase change material;Degradation;electron irradiation
Issue Date: 2016
Publisher: Elsiever
Citation: Energy, (2016)
Abstract: Poly-ethylene glycol (PEG) with an average molecular weight of 2000 g/mol has been investigated as a phase change material for thermal energy storage applications. PEG ests were maintained at 80C for 861 hours in air, nitrogen, and vacuum environment; the samples maintained in vacuum were further treated with air for a period of several weeks. furthermore, another set of PEG samples was exposed to electron radiation in order to modify some of their polymer properties, such as their melting point Tm, their heat of fusion H, their crystallisation temperature T, the experiments showed that the presence of oxygen led to the degradation of the polymer and to a slight decrease of its melting temperature, while the treatment with electron radiation reduced polymer's heat of fusion. FTIR spectrum analysis showed bands assigned to carbony/carboxylate functional groups, indicating the degradation of PEG in the presence of air/oxygen.
ISSN: 0360-5442
Appears in Collections:Dept of Design Research Papers

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