Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-09T06:10:54.119Z Has data issue: false hasContentIssue false

Nuclear Reaction Analysis Studies on the Interface Formation in Polymer Mixtures

Published online by Cambridge University Press:  21 February 2011

Ullrich Steiner
Affiliation:
Department of Polymer Research, Weizmann Institute, Rehovot 76100, Israel.
Kumar Chaturvedi
Affiliation:
Department of Polymer Research, Weizmann Institute, Rehovot 76100, Israel.
Omer Zak
Affiliation:
Department of Polymer Research, Weizmann Institute, Rehovot 76100, Israel.
Georg Krausch
Affiliation:
Department of Polymer Research, Weizmann Institute, Rehovot 76100, Israel.
Günther Schatz
Affiliation:
Department of Polymer Research, Weizmann Institute, Rehovot 76100, Israel.
Jacob Klein
Affiliation:
Department of Polymer Research, Weizmann Institute, Rehovot 76100, Israel.
Get access

Abstract

We have measured the composition profile between two polymer phases above and below their critical temperature for phase separation Tc, using the 2H(3He,4He)1H nuclear reaction in a direct profiling technique. Above Tc, we verify the “thtrmodynamic slowing down” effects on interdiffusion close to the critical point. Pelow Tc, we find that the width of the interface grows with time to a finite limiting value. The variation of this limiting value, as Tc, is approached from below is in good agreement with the predictions of mean-field theories. The time dependence of the initial interfacial broadening below Tc has been found to be significantly slower than t1/2.

Type
Research Article
Copyright
Copyright © Materials Research Society 1990

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. Klein, J. in Encyclopedia of Polymer Science and Engineering, 2.nd ed. (Wiley & Sons, New York, 1987), Vol.9, p 205; Binder, K. and Sillescu, H., Encyclopedia of Polymer Science and Engineering. 2.nd ed. (Wiley & Sons, New York, 1987)Google Scholar
2. Hashimoto, T., Fujimara, M., Kawai, H., Macromolecules 13, 1660 (1980).Google Scholar
3. Jones, R.A.L., Kramer, E.J., Rafailovich, M.H., Sokolov, J. and Schwarz, S.A., Phys. Rev. Lett. 62, 280 (1989).Google Scholar
4. Brown, H. R., Deline, V. R. and Green, P.F., Nature 341, 221 (1989)Google Scholar
5. Doi, M. and Edwards, S.F., The Theory of Polymer Dynamics, (Oxford University Press, 1986).Google Scholar
6. Hashimoto, T., Phase Transitions, 12, 47, (Gordon and Breach, U.K. 1988)Google Scholar
7. Gennes, P.G. de, Scaling Concepts in Polymer Physics, (Cornell Univ. Press, Ithaca, 1985).Google Scholar
8. Chaturvedi, U.K., Steiner, U., Zak, O., Krausch, G. and Klein, J., Phys. Rev. Lett. 6, 616 (1989).Google Scholar
9. Amsel, G. and Lanford, W.A., Ann. Rev. Nucl. Part. Sci. 34, 435 (1984).Google Scholar
10. Chaturvedi, U.K., Steiner, U., Zak, O., Krausch, G., Schatz, G. and Klein, J., Appl. Phys. Lett. in press.Google Scholar
11. Obtained from Polymer Laboratories LTD, U.K.Google Scholar
12. Obtained from Toyo Soda LTD, Japan.Google Scholar
13. Bates, F.S. and Wignall, G.D., Phys. Rev. Lett. 51, 1429 (1986).Google Scholar
14. Kramer, E.J., Green, P.F. and Palmstrem, C.J., Polymer 25, 473 (1984)Google Scholar
15. Crank, J., The Mathematics of Diffusion, (Oxford Univ. Press, 1975).Google Scholar
16. Green, P.F., PhD thesis, Cornell University, 1986.Google Scholar
17. Steiner, U., Diplomarbeit, Konstanz University, 1989.Google Scholar
18. Binder, K., J. Chem Phys. 79, 6387 (1983).Google Scholar
19. de Gennes, P.G., C. R. Acad. Sci. (Paris) 308, Series II, 13 (1989).Google Scholar
20. Harden, J. L., to be published.Google Scholar
21. Steiner, U., Krausch, G., Schatz, G. and Klein, J., to be published.Google Scholar