Interaction of water vapor with gamma-radiation-induced defects in proton conductive polymers

1Citations
Citations of this article
3Readers
Mendeley users who have this article in their library.
Get full text

Abstract

The correlation between protonic conduction and the amount of radiation-induced defects in gamma-ray-irradiated perfluorosulfonic acid (PFSA) polymers (Aciplex-SF-1004®) has been investigated using a direct-current resistance method, transmission spectroscopy for the ultraviolet (UV) and visible (Vis) wavelength ranges and Fourier transform infrared (FTIR) spectroscopy with the attenuated total refraction (ATR) technique. The proton conductivity of the polymers, which are irradiated with a dose of up to 532 kGy under vacuum at room temperature and subsequently exposure to air, is enhanced by approximately three orders of magnitude as compared to that of the unirradiated polymer. The UV-Vis spectra of the irradiated polymers reveal the presence of fluorocarbon radicals, which increase with the irradiation dose. It is also observed in the UV-Vis and FTIR spectra that peroxy free radicals, unsaturated species (COF), and a carboxyl group (COOH) containing a carbon-oxygen double bond are formed by reactions of the fluorocarbon radicals with oxygen or water vapor in air. In addition, an increase in the hydrogen concentration is observed in the near-surface regions of the irradiated polymers by using an elastic recoil detection (ERD) technique. The production of charge carriers such as protons and oxonium ions (H3O+) by the interaction of water vapor with the activating-radiation-induced defects leads to the enhancement of the proton conductivity. © 2008 Elsevier B.V. All rights reserved.

Cite

CITATION STYLE

APA

Tsuchiya, B., Konishi, Y., Nagata, S., & Shikama, T. (2009). Interaction of water vapor with gamma-radiation-induced defects in proton conductive polymers. Solid State Ionics, 180(6–8), 585–588. https://doi.org/10.1016/j.ssi.2008.12.030

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free