Accession Number:

AD0874877

Title:

Studies in Solid-State Science. XI. A Technique of Measuring the Transparency of Materials as a Function of Temperature

Descriptive Note:

Technical rept.

Corporate Author:

EDGEWOOD ARSENAL ABERDEEN PROVING GROUND MD

Report Date:

1970-09-01

Pagination or Media Count:

15.0

Abstract:

A simple technique has been developed to measure the transparency of materials at any specific wavelength ultraviolet to near infrared versus temperature. The procedure involves heating a sample between calcium fluoride plates in a brass holder placed in a Cary-14 spectrophotometer. Changes in transmittance at a fixed wavelength are recorded continuously as the temperature is allowed to change slowly. As an illustration of the procedure, the transmission properties of the nematic liquid crystal butyl p-p- ethoxyphenoxycarbonyl-phenyl carbonate in its various states are described. For comparative purposes a description of the transmitance of phenyl benzoate which does not possess a mesophase is also included.

Subject Categories:

  • Physical Chemistry
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE