Phase State and Orientational Order
in Liquid-Crystalline Hydrogen-Bonded
Polymer Blends Stabilized

E. B. Barmatov*¹, M. V. Barmatova*, F. Kremer**, and V. P. Shibaev*

* Department of Chemistry, Moscow State University,
Vorob’evy gory, Moscow, 119899 Russia

** Leipzig University, Department of Physics and Geoscience,
Linnestr. 5, Leipzig, 04103 Germany

Received June 21, 2000;
Revised Manuscript Received October 10, 2000

Abstract—Two-component hydrogen-bonded polymer blends of functionalized LC copolymers containing
cyanodiphenyl (or phenylbenzoate) mesogenic fragments and acidic groups (alkyloxybenzoic acid derivatives)
were studied by ²H NMR and IR spectroscopy, DSC, and optical polarization microscopy. It was shown that
the development of hydrogen bonds leads to the formation of polymer blends incapable of phase separation.
Itwas demonstrated that ²H NMR spectroscopy may be advantageously employed to investigate the phase
behavior and orientational order of polymer blends in a magnetic field. The temperature dependence of the
order parameter S of hydrogen-bonded LC polymer blends was evaluated.

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