Hostname: page-component-6898cfcb55-zsp5v Total loading time: 0 Render date: 2026-11-11T12:11:49.056Z Has data issue: false hasContentIssue false
  • English
  • Français

Phase Separation Kinetics During Drying

Published online by Cambridge University Press:  10 February 2011

R. F. Saraf,
S. Ostrander and
R. M. Feenstra
R. F. Saraf
Affiliation:
IBM Corp., T.J.Watson Research Center, Yorktown Hts., NY 10598
S. Ostrander
Affiliation:
Dept. of Material Sci., Alfred University, Alfred, NY 14802
R. M. Feenstra
Affiliation:
Physics Dept., Carnegie Mellon University, Pittsburgh, PA 15213
Get access

Abstract

Kinetics of phase separation at air/polymer interface in a binary polymer mixture on evaporation of common solvent is studied. The lateral dimension of the highly anisotropie, pancake-like, minority phase increases with a growth exponent of 2/3 identical to ‘late-stage’ growth under (classical) thermal-quench at interface. In contrast to the thermal-quench, during drying the kinetics depends on the initial condition (i.e., initial concentration, C o) that is rescaled to obtain a master-curve.

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.)

Article purchase

Temporarily unavailable

References

(1) Guenoun, P., Beysens, D., Robert, M., Phys. Rev. Lett., 1990, 65 2406.Google Scholar
(2) Wiltzius, P., Cumming, A., Phys. Rev. Lett., 1991, 66, 3000.Google Scholar
(3) Jones, R.A.L., Norton, L.J., Kramer, E.J., Bates, F.S., Wiltzius, P., Phys. Rev. Lett. 1991, 66 1326.Google Scholar
(4) Bruder, F., Brenn, R., Phys. Rev. Lett., 1992, 69, 624.Google Scholar
(5) Tanaka, H., Phys. Rev. Lett., 1993, 70, 2770.Google Scholar
(6) Tanaka, H., Phys. Rev. Lett., 1993, 70, 53.Google Scholar
(7) Siggia, E.D., Phys. Rev. A, 1979, 20, 595.Google Scholar
(8) Chan, J.W., J. Chem. Phys., 1977, 66, 3667.Google Scholar
(9) Shi, B.Q., Harrison, C, Cumming, A., Phys. Rev. Lett, 1993, 70, 206.Google Scholar
(10) Saraf, R.F., Macromolecules, (1993), 26, 36.Google Scholar
(11) Brenker, M.J., Feger, C, J. Polym. Sci., Polym. Chem. Ed., 1987, 25, 2005.Google Scholar
(12) Stoffel, N.C., Kramer, E.J., Volkeson, W., Russell, T.P., Polymer, 1993, 34, 4524.Google Scholar
(13) The reported diffusion constant of water in PMDA-ODA polyimide film is ∼5×10∼−9 cm2/sec. (Li, S.Z., Pak, Y.S., Adamie, K., Greenbaum, S.G., Lim, B.S., Xu, B., Xu, G., Nowick, A.S., J Electrochem. Soc., 1992, 139, 662) at room temperature. Since size of NMP molecule is larger than water, D > 10−9 cm2/sec. However, the films in these studies are not cured to rigid polyimide structure. Thus, conservatively, at 70 °C, we assume D ∼ 10'−9 cm2/sec. (at most).+10−9+cm2/sec.+However,+the+films+in+these+studies+are+not+cured+to+rigid+polyimide+structure.+Thus,+conservatively,+at+70+°C,+we+assume+D+∼+10'−9+cm2/sec.+(at+most).>Google Scholar
(14) Crank, J., The Mathematics of Diffusion, 2nd ed., Oxford University Press, Oxford (1975), p. 50, Fig. 4.1.Google Scholar
(15) Saraf, R.F., Feenstra, R.M., Ostrander, S., Langmuir, submitted.Google Scholar