Primary Hydroxyl Content in Polyols-Evaluation of Two Nuclear Magnetic Resonance (NMR) Methods

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References

Willesboordse, Frisco and Critchfield, F. E. , Analytical Chemistry , 36(12), 2270-2274 (1964 ).

Hendrickson, Joe D. , Ibid , 36(1), 126-128 (1964).

Willesboordse, Frisco and Meeker, R. L. , Ibid., 38(7), 854-858 (1966).

The fluorine-19 NMR method described in this paper is a modification of a method previously described, Groom, T. , Babiec, Jr., J. S. and Van Lewen, B. J. , J. Cell. Plast., 10, 43 (1974).

LeBas, C. L. and Peterson, E. S. , "Proceedings of the SPI 24th Annual Urethane Division Technical Conference," 135-139 (1978).

Turley, P. S. , unpublished data.

A blend of polypropylene glycol (OH # = 60) and polyethylene glycol (OH # = 75) had a calculated primary hydroxyl of 49.7 percent and an observed value by the fluorine-19 NMR method of 39.9 percent (P. A. Turley, unpublished results).