Suspension polymerization of caprolactam
Article first published online: 9 MAR 2003
Copyright © 1965 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 9, Issue 9, pages 2939–2954, September 1965
How to Cite
Gechele, G. B. and Martinis, G. F. (1965), Suspension polymerization of caprolactam. J. Appl. Polym. Sci., 9: 2939–2954. doi: 10.1002/app.1965.070090902
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 17 MAR 1965
- Manuscript Received: 9 FEB 1965
The anionic polymerization of caprolactam (with sodium hydride and acetyl caprolactam as catalysts) carried out in glass ampules is reported. The effect of the catalyst concentration, polymerization temperature, and other variables was studied. Polymerization of caprolactam at temperatures around 120°C. in a paraffin suspension, in which the paraffin was introduced into a syrupy prepolymer is also reported. The influence of a few variables on conversion, molecular weight, particle size distribution, is discussed. Both viscosity and conversion are always lower in suspension than in bulk polymerization. Polymer granules of a wide range of dimensions which generally contain some residual monomer (unlike the bulk polymerization) are obtained in suspension polymerization. The above results are discussed and some interpretations are suggested.