Hostname: page-component-7bb8b95d7b-dtkg6 Total loading time: 0 Render date: 2024-09-22T02:01:00.851Z Has data issue: false hasContentIssue false
  • English
  • Français

Fourteen-year-old aging study of the effect of thickness on methanol transport in crosslinked poly(methyl methacrylate)

Published online by Cambridge University Press:  31 January 2011

Sanboh Lee
Sanboh Lee
Affiliation:
Department of Materials Science, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
Get access

Abstract

The effect of thickness on methanol transport in fourteen-year-old crosslinked poly(methyl methacrylate) was investigated. The samples studied here are from the same primary source of those used by a study made fourteen years earlier. The sample was encapsulated by a plastic bag and maintained in a desiccator at room temperature. Four thicknesses, 0.6, 1.0, 1.5, and 1.9 mm, were examined. Methanol sorption data were fit to a model in which the mass sorption is a combination of case I, case II, and anomalous sorption. The diffusion coefficient for case I transport increases with increasing thickness, but the velocity for case II transport does the opposite. The diffusion coefficient for case I transport and the velocity for case II transport exhibit the Arrhenius behavior. The activation energies for case II transport are 18.9, 16.3, 14.6, and 13.4 kcal/mole, corresponding to the thicknesses 0.6, 1.0, 1.5, and 1.9 mm, respectively. The activation energies for case I transport are 24.7, 24.2, 21.7, and 21.9 kcal/mole, corresponding to the thicknesses 0.6, 1.0, 1.5, and 1.9 mm, respectively. For thickness 1.5 mm the activation energies for case I and case II transport are 21.7 and 14.6 kcal/mole for this study and 24.9 and 17.3 kcal/mole obtained fourteen years ago.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 10 , October 1996 , pp. 2403 - 2405
Copyright
Copyright © Materials Research Society 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Wang, T. T., Kwei, T. K., and Frisch, H.L., J. Polym. Sci. A27, 2019 (1969).Google Scholar
2. Kwei, T. K., Wang, T.T., and Zupko, H.M., Macromolecules 5(5), 645 (1972).CrossRefGoogle Scholar
3. Kwei, T. K. and Zupko, H.M., J. Polym. Sci. A27, 876 (1969).Google Scholar
4. Wang, T. T. and Kwei, T.K., Macromolecules 6, 919 (1973).CrossRefGoogle Scholar
5. Frisch, H. L., Wang, T. T., and Kwei, T. K., J. Polym. Sci. A27, 8 (1969).Google Scholar
6. Harmon, J. P., Lee, S., and Li, J. C. M., J. Polym. Sci., (A) Polym. Chem. Ed. 25, 3215 (1987).CrossRefGoogle Scholar
7. Harmon, J. P., Lee, S., and Li, J.C. M., Polymer 29, 1221 (1988).CrossRefGoogle Scholar
8. Harmon, J. P., Ph.D. Thesis, University of Rochester, Rochester, New York (1982).Google Scholar
9. Grinsted, R. A., Clark, L., and Koenig, J.L., Macromolecules 25, 1235 (1992).CrossRefGoogle Scholar
10. Lin, C. B., Lee, S., and Liu, K. S., Polym. Eng. Sci. 30, 1399 (1990).CrossRefGoogle Scholar