1 research outputs found
Thermotropic Behavior, Packing, and Thin Film Structure of an Electron Accepting Side-Chain Polymer
We report on the phase behavior and the structure of
poly(perylene bisimide acrylate), an electron accepting semiconductor
polymer with disclike side-chain units, in comparison to the corresponding
low molecular weight perylene bisimide. By combination of DSC, optical
microscopy, and temperature-dependent small-angle and wide-angle X-ray
scattering, we show that both compounds display a lamello-columnar
packing. While the perylene bisimide model compound crystallizes,
the polymeric architecture of poly(perylene bisimide acrylate) suppresses
order, leading to a 2D lamello-columnar liquid crystalline phase.
The structure of the side-chain polymer in thin films with different
thermal treatments as observed by GIWAXS correlates well with previously
observed largely different electron mobilities. Such a polymeric,
liquid crystalline compound combines the advantages of molecular order
and easy processability, together with the film forming properties
of polymeric materials