X-ray diffraction study of a nematic-nematic transition in thermotropic liquid-crystalline polyurethanes

Oriano Francescangeli

doi:10.1117/12.215540

2 August 1995 X-ray diffraction study of a nematic-nematic transition in thermotropic liquid-crystalline polyurethanes

Oriano Francescangeli

Proceedings Volume 2372, Liquid Crystals: Materials Science and Applications; (1995) https://doi.org/10.1117/12.215540
Event: Liquid Crystals: Materials Science and Applications, 1994, Zakopane, Poland

Abstract

An x-ray analysis of stretched oriented fibers of polyurethanes TDI-CmCn, derived from various mesogenic alkylene di[4-(w-hydroxyalkyloxy-4-oxybenzoyl)oxybenzoate]s (CmCn) and 2,4-toluenediisocyanate, is reported. The structure of two sequential nematic mesophases, a cybotactic nematic, and a conventional nematic mesophase is evidenced.

Citation Download Citation

Oriano Francescangeli "X-ray diffraction study of a nematic-nematic transition in thermotropic liquid-crystalline polyurethanes", Proc. SPIE 2372, Liquid Crystals: Materials Science and Applications, (2 August 1995); https://doi.org/10.1117/12.215540

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