Solid–liquid interfacial energy of aminomethylpropanediol

Abstract

The grain boundary groove shapes for equilibrated solid aminomethylpropanediol, 2-amino-2 methyl-1.3 propanediol (AMPD) with its melt were directly observed by using a horizontal temperature gradient stage. From the observed grain boundary groove shapes, the Gibbs–Thomson coefficient (Γ), solid–liquid interfacial energy (σSL) and grain boundary energy (σgb) of AMPD have been determined to be (5.4 ± 0.5) × 10−8 K m, (8.5 ± 1.3) × 10−3 J m−2 and (16.5 ± 2.8) × 10−3 J m−2, respectively. The ratio of thermal conductivity of equilibrated liquid phase to solid phase for the AMPD has also been measured to be 1.12 at the melting temperature.