Polymorphism of saturated triglycerides: I. 1,3‐distearo triglycerides

Abstract

Abstract Triglycerides of the 18‐ N ‐18 series, where N is an even‐carbon saturated fatty acid of 2 to 18 carbons in length, were examined by differential scanning calorimetry. The procedures used to obtain heats of fusion and crystallization of the various triglycerides and their polymorphs are described. When small samples (ca. 1–2 mg) were used, the temperature lag was minor at rapid scanning rates thus permitting investigation of polymorphs with relatively rapid rates of conversion, but more accurate calorimetric data were obtained with larger samples. Capillary melting points were also obtained for the various triglycerides and their polymorphs. Calorimetric and melting point data were given.