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Title: Shape stabilised phase change materials (SSPCMs): High density polyethylene and hydrocarbon waxes

Shape stabilised phase change materials (SSPCMs) based on high density polyethylene (HDPE) with high (HPW, T{sub m}=56-58 °C) and low (L-PW, T{sub m}=18-23 °C) melting point waxes were prepared by melt-mixing in a twin-screw extruder and their potential in latent heat thermal energy storage (LHTES) applications for housing assessed. The structure and morphology of these blends were investigated by scanning electron microscopy (SEM). Both H-PW and L-PW were uniformly distributed throughout the HDPE matrix. The melting point and latent heat of the SSPCMs were determined by differential scanning calorimetry (DSC). The results demonstrated that both H-PW and L-PW have a plasticisation effect on the HDPE matrix. The tensile and flexural properties of the samples were measured at room temperature (RT, 20±2 °C) and 70 °C, respectively. All mechanical properties of HDPE/H-PW and HDPE/L-PW blends decreased from RT to 70 °C. In all instances at RT, modulus and stress, irrespective of the mode of deformation was greater for the HDPE/H-PW blends. However, at 70 °C, there was no significant difference in mechanical properties between the HDPE/H-PW and HDPE/L-PW blends.
Authors:
;  [1] ;  [2] ;  [3]
  1. School of Planning, Architecture and Civil Engineering, Queen's University Belfast, BT9 5AG (United Kingdom)
  2. Department of Civil, Environmental and Geomatic Engineering, University College London, WC1E 6BT (United Kingdom)
  3. WMG, University of Warwick, CV4 7AL (United Kingdom)
Publication Date:
OSTI Identifier:
22270995
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1593; Journal Issue: 1; Conference: PPS-29: 29. international conference of the Polymer Processing Society, Nuremberg (Germany), 15-19 Jul 2013; Other Information: (c) 2014 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALORIMETRY; DEFORMATION; DIFFERENTIAL THERMAL ANALYSIS; ENERGY STORAGE; FLEXURAL STRENGTH; HYDROCARBONS; MATRIX MATERIALS; MELTING POINTS; MORPHOLOGY; PHASE CHANGE MATERIALS; POLYETHYLENES; SCANNING ELECTRON MICROSCOPY; STRESSES; TEMPERATURE RANGE 0273-0400 K; TENSILE PROPERTIES; WAXES