JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol.320, no.2, pp.555-562, 2008 (SCI-Expanded)
The grain boundary groove shapes for equilibrated solid neopentylglycol (2,2-dimethyl-1,3-propanediol) (NPG) with its melt were directly observed by using a horizontal temperature gradient stage. From the observed grain boundary groove shapes, the Gibbs-Thomson coefficient (Gamma), solid-liquid interfacial energy (sigma(SL)), and grain boundary energy (sigma(gb)) of NPG have been determined to be (7.4 +/- 0.7) x 10(-8) K m, (7.9 +/- 1.2) x 10(-3) J m(-2), and (15.4 +/- 2.5) x 10(-3) J m(-2), respectively. The ratio of thermal conductivity of equilibrated liquid phase to solid phase for the NPG has also been measured to be 1.07 at the inching temperature. (C) 2008 Elsevier Inc. All rights reserved.