Abstract
The orientation of liquid-crystalline solutions of poly(γ-ethyl-L-glutamate) and its blend with an equal proportion of its D-isomer in static electric and static magnetic fields has been studied by infrared dichroic ratio, NMR, scattering of laser light, X-ray diffraction, and other methods. The polymers undergo an electric-field orientation which is less striking than in the case of poly(γ-benzyl-L-glutamate) when dibromomethane or dichloromethane is used as the solvent. This suggests some important role for the side-chain groups of the polypeptide molecule in stabilizing the liquidcrystalline structure. The polymers orient in magnetic fields, proving that those polypeptides with no benzene groups in their side chains are also magnetically susceptible.
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Iizuka, E. Electromagnetic Orientation of Liquid Crystals of Poly(γ-ethyl-glutamate)s. Polym J 5, 62–71 (1973). https://doi.org/10.1295/polymj.5.62
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DOI: https://doi.org/10.1295/polymj.5.62
