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Influence of an impenetrable interface on a polymer glass-transition temperature
Phys. Rev. E 52, R3329(R) – Published 1 October, 1995
DOI: https://doi.org/10.1103/PhysRevE.52.R3329
Abstract
The thermal expansion of polystyrene thin films, supported on hydrogen-terminated silicon substrates, is measured by x-ray reflectivity. Films on the order of 400 Å and thinner show no glass transition up to at least 60 °C above the bulk glass-transition temperature, while a break in the thickness versus temperature curve, signaling the glass transition and the onset of bulk behavior, is observed for thicker films. This increase in the glass-transition temperature is in contrast to similar studies on the silicon native-oxide surface where a decrease in the glass-transition temperature is observed. This illustrates the importance of the character of the substrate surface in determining thin film behavior.
References (20)
- Physics of Polymer Surfaces and Interfaces, edited by I. C. Sanchez (Butterworth-Heinemann, Boston, 1992).
- Polymer/Inorganic Interfaces, edited by R. L. Opila, F. J. Boerio, and A. W. Czanderna (Materials Research Society, Pittsburgh, 1993).
- G. Reiter, Phys. Rev. Lett. 68, 75 (1992); Macromolecules 27, 3046 (1994).
- W. Zhao et al., Phys. Rev. Lett. 70, 1453 (1993).
- R. Yerushalmi-Rozen, J. Klein and L. J. Fetters, Science 263, 793 (1994).
- For example, see, P. K. Brazhnik, K. F. Freed and H. Tang, J. Chem. Phys. 101, 9143 (1994).
- For example, see, D. N. Theodorou, Macromolecules 22, 4589 (1989).
- H.-W. Hu and S. Granick, Science 258, 1339 (1992).
- G. Beaucage, R. Composto and R. S. Stein, J. Polym. Sci. Polym. Phys. Ed. 31, 319 (1993).
- W. J. Orts, J. H. van Zanten, W. L. Wu and S. K. Satija, Phys. Rev. Lett. 71, 867 (1993).
- J. L. Keddie, R. A. L. Jones and R. A. Cory, Europhys. Lett. 17, 59 (1994).
- W. L. Wu, J. H. van Zanten and W. J. Orts, Macromolecules 28, 771 (1995).
- J. R. Vig, in Handbook of Semiconductor Wafer Cleaning Technology, edited by W. Kern (Noyes Publications, Park Ridge, NJ, 1993).
- P. Jakob, Y. J. Chabal, K. Raghavachari, P. Dumas and S. B. Christman, Surf. Sci. 285, 251 (1993); Appl. Surf. Sci. 65/66, 580 (1993).
- S. P. Timoshenko and J. N. Goodier, Theory of Elasticity, 3rd ed. (McGraw-Hill, New York, 1970), Chap. 13.
- Polymer Handbook, 3rd ed., edited by J. Brandrup and E. H. Immergut (John Wiley, New York, 1989).
- A. M. Mayes, Macromolecules 27, 3114 (1994).
- J. H. Gibbs and E. A. DiMarzio, J Chem. Phys. 28, 373 (1958); E. A. DiMarzio and J. H. Gibbs, ibid. 28, 807 (1958).
- K. Ueberreiter and G. Kanig, J. Chem. Phys. 18, 399 (1950).
- W. E. Wallace (unpublished).