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AuthorAlMaadeed M.A.
AuthorLabidi S.
AuthorKrupa I.
AuthorKarkri M.
Available date2022-05-31T19:01:31Z
Publication Date2015
Publication NameThermochimica Acta
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.tca.2014.11.023
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84918581849&doi=http://dx.doi.org/10.1016%2fj.tca.2014.11.023&partnerID=40&md5=27a9c414806bc4019ccadb4193302de7
URIhttp://hdl.handle.net/10576/31889
AbstractPhase change materials fabricated from high density polyethylene (HDPE) blended with 40 or 50 wt% commercial wax (melting point of 43.08�C) and up to 15 wt% expanded graphite (EG) were studied. Techniques including scanning electron microscope (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and an experimental device to measure diffusivity and conductivity (DICO) were used to determine the microstructural, mechanical and thermal properties of the composites. The composites possessed good mechanical properties. Additionally, no leaching was observed during material processing or characterization. Although the Young's modulus increased with the addition of EG, no significant changes in tensile strength were detected. The maximum Young's modulus achieved was 650 MPa for the HDPE/40% wax composite with 15 wt% EG. The EG was well dispersed within the composites and did not affect the melting or crystallization of the HDPE matrix. The incorporation of EG increased the thermal stability of the composites by reducing chain mobility and inhibiting degradation. The intensification of thermal conductivity occurred with increasing fractions of EG, which was attributed to the high thermal conductivity of graphite. The maximum quantity of heat stored by latent heat was found for the HDPE/40% wax composite with EG. The addition of a relatively small quantity of EG enhances the heat conduction in the composite.
Languageen
PublisherElsevier
SubjectCharacterization
Differential scanning calorimetry
Elastic moduli
Graphite
Heat conduction
Heat storage
High density polyethylenes
Latent heat
Scanning electron microscopy
Tensile strength
Thermal conductivity
Thermodynamic properties
Thermodynamic stability
Thermogravimetric analysis
DSC analysis
Experimental devices
High density polyethylene(HDPE)
High thermal conductivity
Latent heat thermal energy storage
Material processing
Mechanical and thermal properties
Phase Change
Phase change materials
TitleEffect of expanded graphite on the phase change materials of high density polyethylene/wax blends
TypeArticle
Pagination35-44
Volume Number600
dc.accessType Abstract Only


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