Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Thermal Conditions on the Cluster Formation of Sulfonated Polystyrene Ionomers

  • Published : 1998.03.20
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of thermal conditions on the clustering of sulfonated polystyrene ionomers was investigated. It was found that when the zinc-sulfonated ionomer was dried above a matrix glass transition temperature (Tg), the cluster Tg was observed at ca. 310 ℃, which is ca. 45 ℃ higher than that for the ionomer dried below the matrix Tg. This difference is believed to be the result of the increase in chain mobility at higher temperatures, which improves the multiplet formation and clustering; thus the cluster Tg increases. In the lithium ionomer case, however, the increase in the cluster Tg was ca. 6 ℃ upon annealing. From the results, it was suggested that in the zinc ionomer, the zinc ion is soft and divalent, which results in weaker interactions in multiplets, and thus decreases the stability of the multiplets. Therefore, the thermal effect is more significant for the zinc ionomers than for the lithium ionomers.

Keywords

References

  1. Physical Properties and Structure Ion-Containing Polymer Eisenberg, A.;King, M.
  2. Macromolecules v.23 Eisenberg, A.;Hird, B.;Moore, R. B.
  3. Macromolecules v.3 Eisenberg, A.
  4. Advances in Chemistry Series v.187 Ions in Polymers Eisenberg, A.(ed.)
  5. ACS Symp. Series v.180 Perfluorinated Ionomer Membranes Eisenberg, A.(ed.);Yeager, H. L.(ed.)
  6. ACS Symp. Series v.302 Coulombic Interactions in Macromolecular Systems Eisenberg, A.(ed.);Bailey, F. E.(ed.)
  7. NATO ASI series v.C198 Structure and Properties of Ionomers Pineri, M.(ed.);Eisenberg, A.(ed.)
  8. Macromolecules v.20 Galambos, A. F.;Stockton, W. B.;Koberstein, J. T.;Sen, A.;Weiss, R. A.
  9. PhD. Thesis, Department of Polymer Science and Engineering. University of Massachusetts Connolly, J. M.
  10. Polymer v.32 Hara, M.;Jar, P.;Sauer, J. A.
  11. J. Polymer. Sci.: Part B: Polym. Phys. v.33 Kim, J.-S.;Eisenberg, A.
  12. U. S. Patent 3 870 841 Makowski, H. S.;Lundberg, R. D.;Singhal, G. L.
  13. J. Polymer. Sci.: Part B: Polym. Phys. v.28 Hird, B.;Eisenberg, A.
  14. Macromolecules v.27 Kim, J.-S.;Jackman, R. J.;Eisenberg, A.