Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-27T02:19:32.607Z Has data issue: false hasContentIssue false
  • English
  • Français

A Positron-Annihilation-Lifetime study of PolymerBlends

Published online by Cambridge University Press:  15 February 2011

J. Liu ,
Y. C. Jean  and
H. Yang
J. Liu
Affiliation:
Department of Chemistry, University of Missouri-Kansas City, Kansas City, MO 64110
Y. C. Jean
Affiliation:
Department of Chemistry, University of Missouri-Kansas City, Kansas City, MO 64110
H. Yang
Affiliation:
Eastman Chemical Co. Kingsport, TN 37662–5001
Get access

Abstract

Positron-annihilation-lifetime (PAL) spectroscopy has been utilized toinvestigate the free-volume properties of two types of polymer blends, amiscible blend of bisphenol-A polycarbonate (PC) and tetramethyl bisphenol-Apolycarbonate (TMPC), and an immiscible blend of PC and polystyrene (PS). Inthe miscible blend, the free-volume hole size and its fraction follow alinear relationship with respect to the weight fraction while in theimmiscible blend, the relationship is not linearly additive. The free-volumehole distributions in the immiscible blend are found to be significantlybroader than those in the pure polymers. The difference is thought to be aresult of the free volume formed and associated with the conformation andinterchain packing between the dissimilar chains in incompatiblepolymers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 321: Symposium E – Crystallization and Related Phenomena in Amorphous Materials—Ceramics, Metals, Polymers, and Semiconductors , 1993 , 47
Copyright
Copyright © Materials Research Society 1994

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] For examples, see Paul, D. R. and Newman, S., Eds. “Polymer Blends”, Vol. 1 and 2, Academic Press, N.Y. (1978);Google Scholar
Utracki, L.A., “Polymer Alloys and Blends”, Hanser Pub. N.Y. (1990)Google Scholar
[2] For examples, see Olablsl, O., Robeson, L.M., and Shaw, M.T., “Polymer-Polymer Miscibility”, Academic Press, N.Y. (1980)Google Scholar
[3] For examples, see Wu, S., J. Polym. Sci. B, Polym. Phys. 25. 2511 (1987);Google Scholar
Steller, R., Zuchowska, D., J. Appl. Polym. Sci. 8438, 1411 (1991)Google Scholar
[4] For example, see Ferry, J.D., “Viscoelastic Properties of Polymers,” 3rd ed. John Wiley & Sons, NY (1980)Google Scholar
[5] For examples, see Jean, Y.C., J. Microchem. 42, 72 (1990)Google Scholar
[6] Kluin, J.E., Yu, Z., Vleeshouwers, S., McGervey, J.D., Jamieson, A.M., Simha, R., and Sommer, K., Macromolecules, 26, 1853 (1993)Google Scholar
[7] Zipper, M.D., Simon, G.P., Cherry, P., and Hill, A.J., J. Polym. Sci. B, Polym. Phys. (in press 19931)Google Scholar
[8] Yang, H., and Ni, B., ACS Polymer Reprints 33 (2), 573 (1992)Google Scholar
[9] For examples, see “Positron Solid-state Physics,” Eds. Brandt, W. and Dupasquier, A., North Holland Pub. AMsterdam (1983) ;Google Scholar
“Positron and Positronium Chemistry,” Eds. Schrader, D.M. and Jean, Y.C., Elsevier Pub. Amsterdam (1988)Google Scholar
[10] PATFIT 88 package (1989 version) was purchased from Riso National Labs. Denmark.Google Scholar
[11] Provencher, S.W., Comp. Phys. Comm. 22, 229 (1982)Google Scholar
[12] Gregory, R.B., and Zhu, Y., Nucl. Inst. Methods in Phys. Res. A290. 172 (1990)Google Scholar
[13] Nakanishi, H. and Jean, Y.C., in “Positron and Positronium Chemistry,” ed. Schrader, D.M. and Jean, Y.C., Elsevier Pub. Amsterdam (1988) Chapter 5, p. 159 Google Scholar
[14] Wang, Y.Y., Nakanishi, H., Jean, Y.C., and Sandreczki, T.C. J. Polym. Sci. B, Polym. Phys. 28, 1431 (1990)Google Scholar
[15] Liu, J., Deng, Q., and Jean, Y.C., Macromolecules (Dec. 1993)Google Scholar
[16] Jean, Y.C., and Deng, Q., J. Polym. Sci. B, Polym. Phys. 29. 1359 (1992)Google Scholar
[17] For example, see Shaw, M.T., J. Appl. Polym. Sci. 18, 449 (1974) ;Google Scholar
Kim, C.K., Aguilar, M., and Paul, D.R., J. Polym. Sci. B, Polym. Phys. 30, 1131 (1992)Google Scholar
[18] For examples, see Groeninckx, G., Chandra, S., Berghmans, H., and Smets, G., in “Multiphase Polymers”, Adv. ACS Ser. 176. 337 (1979);Google Scholar
Afeworki, M., and Schaefer, J., Macromolecules 25, 4097 (1992)Google Scholar