Accession Number:

AD0741898

Title:

Qualitative and Quantitative Analysis of Enclosed Atmospheres by Liquid Crystals

Descriptive Note:

Final rept. 1 Apr 1967-31 July 1969

Corporate Author:

KENT STATE UNIV OH LIQUID CRYSTAL INST

Personal Author(s):

Report Date:

1971-12-01

Pagination or Media Count:

105.0

Abstract:

The development of a total liquid crystal system for trace contaminant detection in closed atmospheres has been designed, and quantitative information has been obtained for liquid crystals which respond to organic vapors. The vapors which have been detected are aromatic, aliphatic and chlorinated hydrocarbons. The electronic and vapor chamber design are described and preparation of liquid crystal materials is included. The theoretical and practical limitations of liquid crystals have been determined and compared. A practical limitation of reversible organic detection was found as 50 parts per billion ppb. Response curves for 32 organic solvents are included. The measurement of diffusivity for organic vapors and liquid crystals was determined. Novel derivatives were made of 3 beta-carboxy-5-cholestene, which show interesting liquid crystalline properties.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE