摘要:

New liquid crystalline compounds have been prepared from glucosamine and 6-amino-6-deoxy-hexopyranoses. The monoalkylated carbohydrates show smectic phases. The influence of the amino group on the clearing temperatures is minor. The salts of the cyclic amines can form smectic or discotic mesophases. The clearing points are lower than those observed for acyclic amines.

ISSN:0267-8292    

DOI:10.1080/02678299408036743

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

We have investigated the electro-optic behaviour of polymer sheets containing small chiral nematic liquid crystal droplets. In previous investigations of polymer-dispersed liquid crystals (PDLC), either non-chiral nematic liquid crystals or cholesteric liquid crystals with very small pitch (p<γ) have been used. Here we adjusted the pitchpto be below the Mauguin limit, but well above the wavelength,γ, of the visible range of light; typically we chosep≈ 2γ/Δn. Between crossed polarizers, the sample can be switched from a transparent off state to a dark on state. With respect to non-chiral nematic PDLC films, the transmittance is lower, but the angular dependence is improved.

ISSN:0267-8292    

DOI:10.1080/02678299408036744

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0267-8292    

DOI:10.1080/02678299408036732

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor