Abstract
A brief review is presented of the thermal behaviour of the long-chain carboxylates (soaps) of divalent metal ions, and some of the important factors influencing the phase behaviour are highlighted. A more detailed discussion is given of the behaviour of the lead(II) soaps, where a variety of physical techniques have been employed to characterize the phase structures. For the straight chain soaps, two liquid crystalline phases are observed between solid and isotropic liquid, whereas for longer chain homologues only one mesophase is observed. The effects of unsaturation and chain branching are discussed, and indications given of the major energetic contributions to the phase transitions. In some cases polymorphism is observed in the solid phases, and metastable phases produced on cooling may be stable for long times. The phase behaviour of divalent metal soaps in two and three component systems is examined, both in terms of the effect of additional components on phase structures, and of the solubility of soaps in a variety of polar and non-polar solvents.
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Burrows, H.D. (1990). The Phase Behaviour of Metal(II) Soaps in One, Two and Three Component Systems. In: Bloor, D.M., Wyn-Jones, E. (eds) The Structure, Dynamics and Equilibrium Properties of Colloidal Systems. NATO ASI Series, vol 324. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3746-1_28
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DOI: https://doi.org/10.1007/978-94-011-3746-1_28
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