Transport properties of polystyrene to organic blowing agents were studied by applying the sorption method to both submicron-thickness cell walls and standard blown films. In addition to the benefit of having greatly shortened test times, the use of cell walls revealed that blowing agents diffused more slowly and dissolved less in the cell walls than in the much thicker films. The diffusion and solubility coefficients of blowing agents were found to be pressure-dependent.
Get full access to this article
View all access options for this article.
References
1.
1. Crank, J., The Mathematics of Diffusion2nd Ed.; Oxford University Press, 1975; p. 239.
2.
2. Nakamura, M. and Buttler, F., Dow Chemical Company, personal communication (1962).
3.
3. Crank, J. and Henry, M.E., Trans. Faraday Soc., 45,639 (1975).
4.
4. Hopfenberg, H.B. and Frisch, H.L., J. Polym. Sci., B7,405 (1969).
5.
5. Meares, P., J. Am. Chem. Soc., 76, 3415 (1954).
6.
6. Barrer, R.M., Barrie, J.A., and Slater, J., J. Polym. Sci., 27, 177 (1958).
7.
7. Toi, K., Ohori, Y., Maeda, Y., and Tokuda, T., J. Polym. Sci., 18, 1621 (1980).
8.
8. Vieth, W.R., Tam, P.M. and Michaels, A.S., J. Colloid and Interface Sci., 22,360 (1966).
