The transport of methyl methacrylate monomer in poly(methyl methacrylate)
Article first published online: 9 MAR 2003
Copyright © 1975 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 19, Issue 9, pages 2485–2491, September 1975
How to Cite
Hopfenberg, H. B., Stannett, V. T. and Jacques, C. H. M. (1975), The transport of methyl methacrylate monomer in poly(methyl methacrylate). J. Appl. Polym. Sci., 19: 2485–2491. doi: 10.1002/app.1975.070190911
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Received: 8 JAN 1975
The absorption kinetics and equlibria of methyl methacrylate monomer into poly(methyl methacrylate) were studied over a range of penetrant activities. The interval sorption kinetics at elevated activities were determined, compared, and contrasted with the integral sorption experiments in previously unpenetrated film samples. The sorption kinetics in previously unpenetrated films were predominantly case II or relaxation controlled at high activities. A Fickian contribution to the overall kinetics was apparent at lower activities. In contrast, interval sorption, at elevated activities in previously equilibrated and plasticized samples, followed Fickian kinetics rather closely, whereas resorption, over an activity range which involved a traversal of the effective Tg, was characterized by more complicated kinetics involving a super case II mechanism at long times. These composite results reinforce the notion that the kinetics describing penetration of a single penetrant into a single polymer are extremely sensitive to the boundary condition imposed upon the polymeric sorbent.