PHYSICAL PROPERTIES OF THE CHOLESTERIC MESOPHASE.
Abstract
X-ray studies were initiated on the cholesteric structure and on the solid forms of the red, green and blue colors of cholesteric esters which were prepared by quick freezing the cholesteric structure. Instrumentation for x-ray studies were designed and constructed. Infrared dichroism measurements were conducted by applying, in one series of studies, an electric field perpendicular to the direction of the propagation of the polarized radiation and in the second series parallel to the direction of propagation of the polarized radiation. An expression was derived that defined the dependence of the dichroic ratio on the magnitude of the applied field using a model of the molecular domain acting as a rigid dipole. The maximum degree of orientation of the nematic structure of p-methoxybenzylidene-p-prime-cyanoaniline was found to be 0.33 at 106 degrees. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1966
- Accession Number
- AD0801061
Entities
People
- Glenn H. Brown
Organizations
- Kent State University