Polymorphism of saturated triglycerides: II. 1,3-dipalmito triglycerides

Differential scanning calorimetry was used to examine triglycerides of the 16-N-16 series, whereN is an even-carbon, saturated fatty acid of 2 to 18 carbons in length. The procedures used to obtain heats of fusion and crystallization of the various triglycerides and their polymorphs are described. Small samples (ca. 1-2 mg) were used to investigate polymorphs with relatively rapid rats 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 are given.