Determination of Solubility Parameters of New Suit Materials

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Abstract
The U.S. Coast Guard set out to determine three-dimensional solubility parameters for several new materials. The final approach employed three measures of responses to exposure of material to each of 56 solvents of diverse solubility parameters. The intent was to identify the best measure for this purpose in terms of ease of conducting the test and its statistical reliability. The responses measured were: visual observation of changes, volume increase, and weight gain. Weight gain proved to be the best measure of the three, providing the greatest amount of information with the least experimental error. Tests were conducted on: butyl rubber, chlorobutyl rubber, “three-ply” chlorinated polyethylene, Viton A (copolymer), Viton B (terpolymer), and Teflon. Tests conducted for 24 h gave essentially the same results as those conducted for one week. No three-dimensional solubility parameter could be obtained for Teflon, because of its minimal interaction throughout the solubility parameter space.

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