Polymorphic transformation in asclepic acid (cis-ω7-octadecenoic acid)
✍ Scribed by Noriyuki Yoshimoto; Masao Suzuki; Kiyotaka Sato
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 621 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0009-3084
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The influence of difference in A chain length of cis-monounsaturated fatty acids on the phase behavior of their binary mixtures was examined based on the phase diagram of the mixture composed of palmitoleic acid (Ci6; o~7, A9) and asclepic acid (Cls; ~7, A11). The phase diagram exhibited a 'eutectic
exists as two crystalline polymorphic forms (designated as and phases). A polymorphic phase transformation from the phase to the phase has been investigated using ex situ powder X-ray di4raction, in situ high-temperature optical microscopy, and di4erential scanning calorimetry. The transformation oc