Structural features determine the stability of polyurethanes. Polyether based polyurethanes have excellent hydrolytic stability but are sensitive to thermooxidative and UV-degradation. In contrast, polyester based polyure thanes are relatively stable toward thermooxidative degradation but have poor hydrolytic stability.
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References
1.
Wilson, R.B. , Chen, Y., Paul, I.C., and Curtin D.Y., J. Am. Chem. Soc, 105, 1672 (1983).
2.
Richter, R. and Ulrich, H., Tetrahedron Lett., 1875 (1974).
3.
Ulrich, H., U.S. Pat.3,330,849 (1967).
4.
Statton, G.L. and Gaul, J.M., J. Cell. Plastics , 346 (1984).
5.
Bonk, H.W. and Shah, T.M., U.S. Pat4 ,202,957(1980);
6.
see also R.X. O'Shea, "Urethane Chemistry and Applications,"ACS Symposium Series172, p. 248 (1981).
7.
Mathur, G., Kresta, J.E., and Frisch, K.C., "Stabilization of Polyether-Urethanes and Polyether (Urethane-Urea) Block Copolymers,"Advances in Urethane Science and Technology , Vol. 6, p. 103, Technomic, Lancaster, PA (1978).
8.
Pryor, W.A., Gu, J., and Church, D.F., J. Org. Chem., 50, 185 (1985).
9.
Schollenberger, C.S. and Stewart, F.D., J. Elastoplastics , 4, 294 (1972).
10.
D. S. Gilmore Research Laboratories, unpublished results.
Bonk, H.W., Sardanopoli, A.A., Ulrich, Henri, and Sayigh, A.A.R., J. Elastoplastics, 3, 157 (1971).
15.
Neumann, W. , Holtschmidt, H., Peter , J., and Fischer, P., U.S. Pat.3, 193,522( 1965).
16.
Ulrich, Henri , Bonk, Henry W., and Colovos , George C., "Synthesis and Biomedical Applications of Polyurethanes," in Synthetic Biomedical Polymers , Technomic Publ. Co., Lancaster, PA, p. 29 ( 1980).
