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Published March 1, 1979 | public
Journal Article

Regular Copolyamides VII. Water Adsorption in Regular Copolyoxamides

Abstract

Water absorption at 93% relative humidity and 25°C was determined for 12 regular aliphatic/aromatic copolyoxamides. The equilibrium water absorption ranges from 7°C to 30%, varied with the polymer structure and is highest in polymers with high amide concentration. The water absorption is reversible and seems to consist of a two-step process, rapid absorption of water by polymer followed by a slower second stage as equilibrium is approached. These polymers have low crystallinity and the water absorption does not occur in crystalline regions. All water is bound to the polymer: it may be freed by heating the hydrated polymer above 100°C. but rebinds completely at room temperature.

Additional Information

©1979 Alber. Now owed by Wiley. Manuscript received: July 17, 1978. Article first published online: 12 Mar. 2003. This work was supported in part by a grant from the National Science Foundation Materials Research Laboratory.

Additional details

Created:
September 15, 2023
Modified:
October 23, 2023