Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9781756 | Journal of Physics and Chemistry of Solids | 2005 | 6 Pages |
Abstract
Polyalcohols are potential thermal energy storage materials that exhibit energetic solid-state phase transformations, and usually referred to as 'Plastic Crystals'. The adjustment of solid-state phase transition temperatures is of significance to practical applications; phase diagram are useful for this purpose. We have established binary phase diagrams of 2-amino-2-methyl-1,3-propanediol (AMPL)-neopentylglycol (NPG), pentaerythritol (PE)-AMPL,tris(hydroxymethyl)aminomethane (TRIS)-NPG systems. In this work, we present results of our thermodynamic assessments of these organic binary systems. The CALPHAD approach using Thermo-Calc software was utilized for this purpose. It is interesting to note that two high temperature plastic phases co-exist in all three binaries considered here. Thermal energies are predominantly stored in these cubic γ or γⲠplastic phases in molecular librations (O-Hâ¯O bonds) and lattice vibrations. The calculated phase diagrams are in close agreement with the experimental phase diagrams.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Dhanesh Chandra, Raja Chellappa, Wen-Ming Chien,