Phase separation in the organic solid state: the influence of quenching protocol in unstable n-alkane blends

Gilbert, EP; Nelson, ARJ; Sutton, D; Terrill, N; Martin, C; Lal, J; Lang, E

Phase separation in the organic solid state: the influence of quenching protocol in unstable n-alkane blends

Date

2005-08-31

Authors

Publisher

Taylor & Francis

Abstract

Blends of normal alkanes form lamellar structures, when quenched from the melt, in which the separation of the individual chains may be controlled by the chain-length mismatch, molar composition, isotopic substitution and confinement. 2:1 C28H58:C36D74 mixtures have been investigated after subjection to a cooling rate varying over three orders of magnitude and intermediate annealing prior to reaching ambient. Quenching at 100°C/min yields similar behaviour to intermediate annealing between the pure components' melting points. Slow cooling at 0.1°C/min generates significantly greater ordering and behaviour comparable to that obtained from annealing mid-way between the mixing transition and the C28H 58 melting point. © 20u25Informa UK Limited

Keywords

Separation processes, Solid state physics, Quenching, Alkanes, Lamellae, Annealing, Melting points, Small angle scattering

Citation

Gilbert, E. P., Nelson, A., Sutton, D., Terrill, N., Martin, C., Lal, J., & Lang, E. (2005). Phase separation in the organic solid state: the influence of quenching protocol in unstable n-alkane blends. Molecular Crystals and Liquid Crystals, 440(1), 93–105. doi:10.1080/15421400590957882