Paper Title:
Positron Annihilation Lifetime Study of Graft-Type Fluorinated Polymer Electrolyte Membranes
  Abstract

Positron annihilation lifetime spectroscopy (PALS) measurements were performed on polymer electrolyte membranes (PEMs) synthesized by radiation-induced graft polymerization of styrene into crosslinked-polytetrafluoroethylene (cPTFE) films and subsequent sulfonation. The base cPTFE and polystyrene grafted films were also measured as references. The cPTFE based PEM was found to have free-volume holes with different radius of 0.28-0.30 nm and 0.44-0.45 nm. The larger holes may be located in PTFE amorphous regions, while the smaller ones are considered to exist in both PTFE crystallites and poly(styrene sulfonic acid) grafts containing no water.

  Info
Periodical
Edited by
S. J. Wang, Z. Q. Chen, B. Wang and Y. C. Jean
Pages
70-72
DOI
10.4028/www.scientific.net/MSF.607.70
Citation
S. Sawada, A. Kawasuso, M. Maekawa, A. Suzuki, T. Terai, Y. Maekawa, "Positron Annihilation Lifetime Study of Graft-Type Fluorinated Polymer Electrolyte Membranes", Materials Science Forum, Vol. 607, pp. 70-72, 2009
Online since
November 2008
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$32.00
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