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Urethane oligomers as the models for liquid crystalline polymers

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Abstract

A series of new liquid crystalline oligomers based on 1,6-hexamethylene diisocyanate and its di- or trimers (uretdione, biuret, or isocyanurate) and 4′-ω -hydroxyalkyl-4-cyano-biphenyls was synthesized. The resulting set of oligomers is a structural model for liquid crystalline polymers containing mesogenic groups in the main and side chains, as well as star polymers. Mesomorphic properties of the oligomers were evaluated using differential scanning calorimetry and polarization optical microscopy. Structure and dipole architecture of the central unit of synthesized oligomers cause a decisive influence on their mesomorphic properties. The formation of network of interchain hydrogen bonds significantly stabilized the liquid crystalline state, which was confirmed by IR spectroscopy.

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Authors and Affiliations

  1. ITMO University, 49 Kronverksky prosp., 197101, St. Petersburg, Russian Federation

    S. A. Gorbachev & V. V. Zuev

  2. S. M. Kirov Military Medicinal Academy, 6 ul. Akademika Lebedeva, 194044, St. Petersburg, Russian Federation

    S. A. Gorbachev

  3. Institute of Macromolecular Compounds, Russian Academy of Sciences, 31 V. O. Bolshoy prosp., 199004, St. Petersburg, Russian Federation

    V. V. Zuev

Authors
  1. S. A. Gorbachev
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  2. V. V. Zuev
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Correspondence to V. V. Zuev.

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No human or animal subjects were used in this research.

The authors declare no competing interests.

Based on the materials of the XVIII International Research and Development Conference “Novel Polymeric Composites. Mikitaev Readings” (July 4–9, 2022; p. Elbrus, Kabardino-Balkarian Republic, Russia).

Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, Vol. 72, No. 6, pp. 1430–1437, June, 2023.

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Gorbachev, S.A., Zuev, V.V. Urethane oligomers as the models for liquid crystalline polymers. Russ Chem Bull 72, 1430–1437 (2023). https://doi.org/10.1007/s11172-023-3918-7

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  • DOI: https://doi.org/10.1007/s11172-023-3918-7

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