対称型2-オイレン酸, 1-, 3-飽和酸トリグリセライド : POP, SOS, AOA, BOBの混合系の結晶多形現象

Polymorphic Behaviors of Mixtures of Symmetric 2-oleyl, 1-, 3- Saturated Acid Triglyceides : POP, SOS, AOA, and BOB

Wang Zhao Hong

Sato Kiyotaca

Okada Masakazu

広島大学生物生産学部紀要

Journal of the Faculty of Applied Biological Science, Hiroshima University

The polymorphic behaviors of mixtures of some symmetric 2-oleic, 1-, 3-saturated acids triglycerides have been examined by X-ray diffraction method. The triglycerides examined are POP, SOS, AOA and BOB, in which the saturated acid moieties are palmitic, stearic, arachidic and behenic acids, respectively. The polymorphic modifications which were commonly detected as independent phases in all the above triglycerides are (tentatively named) α, β', sub β, X and β. The thermodynamical stability increases from α to β, leading a monotropic transformation along the direction from α to β described above. The mixtures were blended using a basic sample of a 1 : 1 mixture of POP and SOS with additives of AOA and BOB. An addition of small amounts of AOA and BOB caused both a change in the transformation circuits from β'→ sub β→X→β to β'→intermediate→β, and a decrease of the duration for the complete conversion into the most stable β form. Whereas the transformation was delayed with increasing an amount of the additives.

Chemistry [ 430 ]

jpn

広島大学生物生産学部

農林水産研究情報センター

[ISSN] 0387-7647

[NCID] AN00213621