✦ LIBER ✦

Interferometric measurements of refractive index increment of polymer solutions

✍ Scribed by I. Baltog; C. Ghita; L. Ghita

Publisher: Elsevier Science
Year: 1970
Tongue: English
Weight: 208 KB
Volume: 6
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(70)90048-0

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✦ Synopsis

For measurements of the refractive index increment of polymer solutions, with a standard Jena interference refractometer, certain modifications of the measuring cell have been proposed.

At room temperature, a simple closure for the cell protects the solutions from evaporation, contamination or losses due to capillarity. For a wider range of temperatures (20°-120°), a new measuring cell with an adequate thermostat device has been suggested. THE RAYLEIGH interference refractometer is one of the instruments frequently utilized for determination of small differences of refractive indices or, more specifically, of the ratio dn/dc in the case of polymer solutions.

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