Presented at 153rd National Meeting, American Chemical Society, Miami Beach, Florida, April 9–14, 1967.
Article first published online: 9 MAR 2003
Copyright © 1967 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 11, Issue 12, pages 2577–2585, December 1967
How to Cite
Pierce, A. G. and Frick, J. G. (1967), Crosslinking cotton with formaldehyde in phosphoric acid. J. Appl. Polym. Sci., 11: 2577–2585. doi: 10.1002/app.1967.070111217
Prod. No. 1656
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Received: 1 MAY 1967
Cotton print cloth was treated with a solution of formaldehyde in concentrated orthophosphoric acid (a strong cellulose swelling agent). The treatment produces a crosslinked cotton with extremely high wet wrinkle recovery and moisture absorptivity, and very low dry wrinkle recovery. The variations in physical properties are explained in terms of crosslink distribution throughout the fiber and specifically by differences in interlamellar and intralamellar crosslinking. Data on the chemical and physical properties of the fabric as well as electron micrographs of fiber cross-sections are presented and compared or contrasted with data from similar treatments employing other solvents such as water (a moderate swelling agent), acetic acid (a weak swelling agent), and sulfuric acid (a solvent which restricts crosslinking to the periphery of the fiber). Although the treatment causes extensive fiber swelling, it produces very little change in crystallinity and no change in crystal lattice type. Also discussed are the effects of combining this wet crosslinking and conventional dry-cure crosslinking with methylol amides in a two-stage process, in which the wet crosslinking is used either as a pretreatment or as an aftertreatment.