Studies in Solid-State Science. XI. A Technique of Measuring the Transparency of Materials as a Function of Temperature
EDGEWOOD ARSENAL ABERDEEN PROVING GROUND MD
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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.
- Physical Chemistry
- Test Facilities, Equipment and Methods