Eudragit S (methyl methacrylate methacrylic acid copolymer)/fatty acid blends as form-stable phase change material for latent heat thermal energy storage


Sari A., Alkan C., Kolemen U. , Uzun O.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.101, no.3, pp.1402-1406, 2006 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 101 Issue: 3
  • Publication Date: 2006
  • Doi Number: 10.1002/app.23478
  • Title of Journal : JOURNAL OF APPLIED POLYMER SCIENCE
  • Page Numbers: pp.1402-1406
  • Keywords: form-stable, Eudragit S, myristic, palmitic and stearic acids, LHTES, polymer-based PCM, DSC analysis, FTIR spectroscopy, FATTY-ACIDS, PARAFFIN, SYSTEMS, POLYMER

Abstract

By composing (Eudragit S) with fatty acids (stearic acid (SA), palmitic acid (PA), and myristic acid (MA)), form-stable phase change materials (PCMs), which can retain the same shape in a solid state even when the temperature of the PCMs is over the melting points of the fatty acids, are prepared. The compatibility of fatty acids with the Eudragit S is proved by microscopic investigation and infrared (FTIR) spectroscopy. The melting and crystallization temperatures and the latent heats of melting and crystallization of the form-stable PCMs are measured by Differential Scanning Calorimetry (DSC) method. The maximum mass percentage of all fatty acids in the form-stable PCMs is found as 70%, and no leakage of fatty acid is observed at the temperature range of 50-70 degrees C for several heating cycles. Thermal properties obtained from the DSC analysis indicate that the Eudragit S/fatty acid blends as form-stable PCM have great potential for passive solar latent heat thermal energy storage (LHTES) applications in terms of their satisfactory thermal properties and utility advantage. (c) 2006 Wiley Periodicals, Inc.