Some recent work carried out in our research group on complex structures found in polymers and
supramolecular systems, using Small Angle X-ray and Neutron Scattering (SAXS and SANS) methods, are reviewed.
These include, Combined SAXS and SANS study of superlattice structures in pure and mixed model polymers; Realtime
SANS study of transient phases during polymer crystallization; Columnar phases with polygonal cross-sections in
T-shaped polyphilic compounds;Complex 3-d phases formed by packing spherical objects (e.g. micelles self-assembled
from tree-like molecules), including the recently discovered liquid quasi-crystals which possess 12-fold rotational
symmetry. Examples of powder, fibre or surface oriented, and single-domain diffractions will be given. Reconstruction
of electron density maps as well as computer modelling are also applied to help solving various complex structures. Keywords: SAXS, SANS, GI-SAXS, supramolecules, liquid crystal. X. B. Zengl, F. Liul, F. Xie\ G. Ungar\ C. Tschierske2, 1. E. Macdonald3
I Department of Engineering Materials, Sheffield University, Sheffield Sl 3JD, United Kingdom
2 Institute of Organic Chemistry, University Halle, Kurt-Mothes-Strasse 2, D-06120 Halle, Germany
3 Department of Physics and Astronomy, Cardiff University, Cardiff, CF24 3AA, United Kingdom
supramolecular systems, using Small Angle X-ray and Neutron Scattering (SAXS and SANS) methods, are reviewed.
These include, Combined SAXS and SANS study of superlattice structures in pure and mixed model polymers; Realtime
SANS study of transient phases during polymer crystallization; Columnar phases with polygonal cross-sections in
T-shaped polyphilic compounds;Complex 3-d phases formed by packing spherical objects (e.g. micelles self-assembled
from tree-like molecules), including the recently discovered liquid quasi-crystals which possess 12-fold rotational
symmetry. Examples of powder, fibre or surface oriented, and single-domain diffractions will be given. Reconstruction
of electron density maps as well as computer modelling are also applied to help solving various complex structures. Keywords: SAXS, SANS, GI-SAXS, supramolecules, liquid crystal. X. B. Zengl, F. Liul, F. Xie\ G. Ungar\ C. Tschierske2, 1. E. Macdonald3
I Department of Engineering Materials, Sheffield University, Sheffield Sl 3JD, United Kingdom
2 Institute of Organic Chemistry, University Halle, Kurt-Mothes-Strasse 2, D-06120 Halle, Germany
3 Department of Physics and Astronomy, Cardiff University, Cardiff, CF24 3AA, United Kingdom
