A new class of side-chain liquid crystalline polymers with polymethacrylate or polyether backbones and two different mesogenic moieties in one side-chain, i.e. a biphenyl group and a cholesterol group, have been synthesized. The thermotropic behavior of both, the monomeric precursors and the polymers, has been investigated. The monomers exhibit smectic A and chiral nematic phases and the polymers exhibit smectic A mesophases. For both, monomers and polymers, the isotropization temperatures and the corresponding dimensionless entropy changes S/R depend on the parity of the spacer between the two mesogens. Replacement of the biphenyl group in the polymethacrylates by a phenyl group lowers the isotropization temperatures, but the smectic A phase is retained.
|Journal||Macromolecular Chemistry and Physics|
|Publication status||Published - 2000|
Scheerder, J., Marcelis, A. T. M., & Sudh"lter, E. J. R. (2000). Synthesis and thermotropic properties of novel side-chain dimer liquid crystalline polymers. Macromolecular Chemistry and Physics, 201(12), 1303-1310. https://doi.org/10.1002/1521-3935(20000801)201:12<1303::AID-MACP1303>3.0.CO;2-B