Abstract
Polymorphism of monoglyceride was examined in the three kinds of binary systems of 1-monostearin-sucrose heptaacetate monofatty acid ester (SHAF) using differential scanning calorimetry and infrared spectrophotometry. Three kinds of SHAF are sucrose heptaacetate monostearate (SHAS), sucrose heptaacetate monopalmitate (SHAP), and sucrose heptaacetate monomyristate (SHAM).
1) Monostearin in the binary systems showed α-type by chilling and it transformed to β-type by heat treatment. This phenomenon occured in all binary systems.
2) Phase diagrams were very analogous in three binary systems. Transition temperatures of Sub-α1, Sub-α1, α-and β-type of monostearin in these phase diagrams were same as it alone, respectivelly.
3) Transition time from α to β-type of monostearin was different with kinds and proportions of binary system. Transition of monosteain from α to β-type was more rapidly in SHAM system than in SHAS system and rapidly with increasing amount of SHAF.
4) Transition time of monostearin in binary systems was dependent on the temperature of heat treatment. This influence of the temperature of heat treatment was pronounced when SHAF was less than 25% of binary systems, but was not when it was 50%.
