Aliphatic polyureas: Melting points versus intrinsic viscosities
Article first published online: 9 MAR 2003
Copyright © 1961 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 5, Issue 16, pages 384–387, July/August 1961
How to Cite
Boenig, H. V., Walker, N. and Myers, E. H. (1961), Aliphatic polyureas: Melting points versus intrinsic viscosities. J. Appl. Polym. Sci., 5: 384–387. doi: 10.1002/app.1961.070051602
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Received: 20 JAN 1961
An homologous series of aliphatic polyureas of the type where the x = 2, 3, 4, 5, 6, 7, 8, 9, and 12, was prepared from hexamethylene diisocyanate and diamines. The polymers were obtained in powder form with the use of acetone as the solvent. The intrinsic viscosities of the phenolic solutions of these polyureas were found to decrease with increasing polymerization temperature. When the melting points of the polymers were plotted against the intrinsic viscosities within each species of polymer, these melting points were found to increase with the intrinsic viscosity. The curves so formed appeared to approach an asymptote.