Paper Title:
Chemical Degradation of the Silicone Rubber in Simulated PEMFC Environments
  Abstract

The long term stability and durability of gaskets made of silicone rubber in proton exchange membrane fuel cell (PEMFC) has important effect on the sealing and the electric-chemical performance of the fuel cell. In present paper, the time-dependent chemical degradation of a silicone rubber was studied in three simulated PEMFC environments. The test temperature was selected and used at 90°C in this study according to the actual PEM fuel cell operation. Optical microscopy was used to show the topographical changes on the sample surface. Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy was employed to study the surface chemistry of the gasket material before and after exposure to the simulated PEM fuel cell environments over time. The results show that the weight loss increased with the exposure time for the samples. Optical microscopy reveals that the surface conditions of the samples changed over time from initially smooth to rough, crack appearance and finally crack propagation. The ATR-FTIR results show that the surface chemistry changed significantly via de-crosslinking and chain scission in the backbone for the material over time.

  Info
Periodical
Advanced Materials Research (Volumes 197-198)
Edited by
Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng
Pages
741-748
DOI
10.4028/www.scientific.net/AMR.197-198.741
Citation
G. Li, J. Z. Tan, J. M. Gong, "Chemical Degradation of the Silicone Rubber in Simulated PEMFC Environments", Advanced Materials Research, Vols. 197-198, pp. 741-748, 2011
Online since
February 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Song Tao Liu, Yong Chao Liu, Li Na Zhu, Hong Wei Cao, Chuan Min Chen
Chapter 6: Solid Waste and Industrial Solid Waste Comprehensive Utilization and Disposal
Abstract:Composite insulator was widely used in the power grid because its excellent performance. Aging issue of composite insulators was appeared...
406
Authors: Pongsopa, Kanchaya Honglertkongsakul, Pattira Homhuan
Chapter 4: Surface Engineering and Technologies of Coating
Abstract:Vulcanized rubber surface was modified by dielectric barrier discharge (DBD) plasma system. The hydrophilic surface can be achieved in the...
375
Authors: Dita Rama Insiyanda, Fredina Destyorini, Nanik Indayaningsih
Chapter 3: Research and Testing of Materials
Abstract:Spectroscopy Fourier Transform Infrared (FTIR) – Attenuated Total Reflectance (ATR) used to study the surface of polymeric materials on...
114