melt state on a smooth surface and allowed to cool slowly to room temperature.” Zone Casting? “...reflections tend to fan out due to axial spread of the polymers and paracrystalline nature of hexagonal packing.” “...experimental evidence of 5-fold periodicity is based on just two meridional layer lines in the X-Ray diffraction ... paterns of orientated fibres and thin films.”
- 21/8 (Bottlebrush) has a long persistence length backbone (therefore greater conjugation & intra chain transport?) Backbone in centre of Helix (therefore inter chain distances greater?) - 21/4 has the backbone spiralling around the core (therefore lower conjugation & reduced intra transport?) But maybe the inter chain distances are less?
for non-branched PF (therefore, shortened coil preferred) 2) Intensities on hk0 plane agree with lateral dimensions of 21/4 3) Strong intensities on l=4 and l=25 may be actual pitch But: This 21/4 Motif is not necessarily that of the backbone (Instead a staggered 21/8 set of helices could produce it)
readily forms (helcial?) rods, even though the polymer chain itself is flexible. Side chains substitution in PFs will have a large effect on the transport properties by directly influencing the structure of the backbone