Phase separation in the organic solid state: simultaneous synchrotron SAXS / DSC studies of unstable n-alkane blends

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 difference, molar composition, isotopic substitution and confinement. We have performed simultaneous synchrotron small-angle X-ray scattering and differential scanning calorimetry studies on 2:1 C28H58:C36D74 mixtures as a function of cooling protocol. Their simultaneous collection enables the temperature-dependent nanostructural changes to be correlated with phase transitions. The data are further complemented by small-angle neutron scattering highlighting the separation of the individual chains via isotopic contrast and optical microscopy indicating changes occurring on the macroscopic scale.

Keywords

Accelerators, Coherent scattering, Cyclic accelerators, Diffraction, Dispersions, Hydrocarbons, Microscopy, Organic compounds, 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: simultaneous synchrotron SAXS / DSC studies of unstable n-alkane blends. Paper presented to the 29th Condensed Matter and Materials Meeting, "Australian Institute of Physics Sixteenth Biennial Congress", Canberra, 2005, 31 January - 4 February 2005. Retrieved from: https://web.archive.org/web/20050615003041/http://aipcongress2005.anu.edu.au/pdf/AIPC_Handbook_V2.pdf

URI

URI:https://web.archive.org/web/20050615003041/http://aipcongress2005.anu.edu.au/pdf/AIPC_Handbook_V2.pdf
https://apo.ansto.gov.au/dspace/handle/10238/11656

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