Polymorphism and solid-state miscibility in the pentadecanoic acid-heptadecanoic acid binary system.
GBABODE, Gabin
Centre de physique moléculaire optique et hertzienne [CPMOH]
Laboratory of polymer chemistry
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Centre de physique moléculaire optique et hertzienne [CPMOH]
Laboratory of polymer chemistry
GBABODE, Gabin
Centre de physique moléculaire optique et hertzienne [CPMOH]
Laboratory of polymer chemistry
< Reduce
Centre de physique moléculaire optique et hertzienne [CPMOH]
Laboratory of polymer chemistry
Language
en
Article de revue
This item was published in
Chemistry and Physics of Lipids. 2008-07, vol. 154, n° 1, p. 68-77
Elsevier
English Abstract
The pentadecanoic acid-heptadecanoic acid (C(15)H(29)OOH-C(17)H(33)OOH) binary system is dealt with in this article. Combined thermal analysis and X-ray powder diffraction experiments are performed to characterize the ...Read more >
The pentadecanoic acid-heptadecanoic acid (C(15)H(29)OOH-C(17)H(33)OOH) binary system is dealt with in this article. Combined thermal analysis and X-ray powder diffraction experiments are performed to characterize the polymorphism of the pure compounds and of their mixed samples. In particular, modern methods of crystal structure resolution from powder data (direct space methods) are applied in order to investigate and compare the molecular arrangement within the solid phases of the fatty acids considered. A proposal of the binary phase diagram is given. It exhibits no less than eight distinct solid phases stabilized on relatively narrow domains of composition which shows the reduced miscibility of the constituents. Finally, a structural model of one of the intermediate solid solutions is developed which well accounts for the mixing behaviour of the two fatty acids and permits to propose an explanation about their low solid-state miscibility.Read less <
English Keywords
Fatty acids
Polymorphism
Solid-state miscibility
Hydrogen bonds
Phase diagram
Structural model
Origin
Hal imported