Graft copolymerization of acrylic acid to nylon 6 by mutual irradiation. II. The influence of cupric ions
Article first published online: 9 MAR 2003
Copyright © 1972 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 16, Issue 4, pages 921–928, April 1972
How to Cite
Huglin, M. B. and Johnson, B. L. (1972), Graft copolymerization of acrylic acid to nylon 6 by mutual irradiation. II. The influence of cupric ions. J. Appl. Polym. Sci., 16: 921–928. doi: 10.1002/app.1972.070160411
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Received: 28 OCT 1971
In the γ-irradiation in vacuo of nylon 6 film in the presence of aqueous acrylic acid and different concentrations of cupric chloride, the following relationships have been obtained: RH ∝ [CuCl2]−1.0 and RG ∝ [CuCl2]−0.3 Here [CuCl2] is the concentration of cupric chloride in the bulk solution, and RH and RG denote the initial rates of homopolymerization and grafting, respectively. The values of −1.0 and −0.3 for the exponents indicate that the cupric ion is a less effective chain terminator in the film on account of its lower concentration there. Analyses of films grafted in different media demonstrate the copper content of a film to be independent of both the concentration of monomer in the solution and the degree of swelling. The copper content is primarily a function of the total poly(acrylic acid) present, i.e., (grafted species plus occluded homopolymer). Thus, at high doses, where the total poly(acrylic acid) associated with a film is significant, the grafting curves exhibit a falling off, and complex formation between cupric ion and a growing chain is considered a likely contributory factor.