Abstract
A new type of induced cholesteric liquid crystalline thermotropic polymer was prepared by the copolymerization of the achiral mesogenic monomer, p-cyanobiphenyl-p′-methacryloyloxybenzoate or p-cyanobiphenyl-p′-acryloyloxybenzoate with the chiral and non-mesogenic monomer, 2-methyl butyl methacrylate, 2-methyl-1-butyl acrylate, or 1-menthyl methacrylate. The mesogenic group is directly attached to the methacrylate- or acrylate-backbone chain without an alkyl spacer. Homopolymers of the achiral and mesogenic monomers exhibited an enantiotropic nematic phase; however, those of the chiral and non-mesogenic monomers themselves did not exhibit any liquid crystalline phases. Copolymers with a combination of achiral mesogenic monomers and chiral non-mesogenic monomers tended to form the so-called induced cholesteric liquid crystalline phase. The type of liquid crystalline phase and transition temperature were found to be different depending upon the fraction of the chiral non-mesogenic comonomer.
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D. van Luyen, L. Liebert, and L. Strzelecki, Eur. Polym. J., 16, 307 (1980).
A. Blumstein and S. Vilasagar, Mol. Cryst. Liq. Cryst. Lett., 72, 1 (1981).
K. Iimura and N. Koide, Rep. Prog. Polym. Phys. Jpn., 25, 297 (1982).
W. R. Krigbaum, Mol. Cryst. Liq. Cryst., 78, 79 (1981).
H. Finkelmann, H. Ringsdorf, W. Soil, and J. H. Wendorff, Makromol. Chem., 179, 829 (1978).
H. Finkelmann, J. Koldehoff, and H. Ringsdorf, Angew. Chem. Int. Ed. Engl., 17, 935 (1978).
A. Blumstein, S. Vilasagar, S. Ponrathnam, S. B. Clough, and R. B. Blumstein, J. Polm. Sci., Polm. Phys. Ed., 20, 877 (1982).
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Mihara, T., Nomura, K., Funaki, K. et al. Induced Cholesteric Liquid Crystalline Polymers. Polym J 29, 309–315 (1997). https://doi.org/10.1295/polymj.29.309
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DOI: https://doi.org/10.1295/polymj.29.309