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Liquid crystalline polymers containing mesogenic units based on half-disc and rod-like moieties

4. Side chain liquid crystalline polymethylsiloxanes containing hemiphasmidic mesogens based on 4-[3,4,5-tri-(alkan-1-yloxy)benzoate]biphenyl groups

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Summary

The synthesis and characterization of the hemiphasmidic monomers 4-{3,4,5-tri-[S(-)-2-methylbutan-1-yloxy] benzoate}-4'-(10-undecenoate)biphenyl (13), 4-[3,4,5-tri-(n-pentan-1-yloxy) benzoate]-4'-(10-undecenoate)biphenyl (14), 4-[3,4,5-tri-(n-dodecan-1-yloxy) benzoate]-4'-(10-undecenoate)biphenyl (15), 4-[3,4,5-tri-(n-dodecan-1-yloxy) benzoate]-4'-(10-undecen-1-yloxy)biphenyl (16) and of the polymethylsiloxanes derived from them (i.e. 17, 18, 19, and 20) are described. Monomers 13 to 16 are only crystalline. Polymer 17 is crystalline, 18 displays an unidentified mesophase, while 19, and 20 exhibit enantiotropic, most probably hexagonal columnar phasmidic mesophases.

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Authors and Affiliations

  1. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, OH, USA

    V. Percec & J. Heck

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  1. V. Percec
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  2. J. Heck
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Percec, V., Heck, J. Liquid crystalline polymers containing mesogenic units based on half-disc and rod-like moieties. Polymer Bulletin 25, 431–438 (1991). https://doi.org/10.1007/BF00310233

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  • DOI: https://doi.org/10.1007/BF00310233

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