Accession Number:
ADA361108
Title:
The Use of Thermal Analysis in the Characterization of a Polymer Surface
Descriptive Note:
Final rept.
Corporate Author:
ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET WEAPONS LAB
Personal Author(s):
Report Date:
1999-03-01
Pagination or Media Count:
15.0
Abstract:
Fuel cells are electrochemical systems that convert hydrogen into electricity without combustion. A proton exchange membrane PEM fuel cell power system consists of a polymer membrane, finely disbursed catalyst, and a gas humidifying system. Thermogravimetry TGA and differential scanning calorimetry DSC are powerful tools that can be used to characterize the physical properties of a polymer membrane. Ion chromatography can monitor the presence of contaminating ions in the aqueous condensate. TGA can easily measure the distribution of metal atalysts on a polymer surface due to the much lower decomposition temperature of the polymer. DSC can be used to measure the concentration of Teflon in a polymer blend by measuring the melting energy.
Descriptors:
- *SURFACE ANALYSIS
- *POLYMERS
- *THERMAL ANALYSIS
- *FUEL CELLS
- IONS
- LOW TEMPERATURE
- PHYSICAL PROPERTIES
- WATER
- ELECTROCHEMISTRY
- HYDROGEN
- MIXTURES
- COMBUSTION
- ELECTRONS
- CATHODES
- ARMY EQUIPMENT
- ELECTRODES
- CHEMICAL REACTIONS
- MELTING
- ELECTRICITY
- OXIDIZERS
- ELECTROLYTES
- CONTAMINATION
- DECOMPOSITION
- CONDENSATION
- ANODES
- CALORIMETRY
- SULFONIC ACIDS
- ELECTROCATALYSTS
- THERMOGRAVIMETRIC ANALYSIS
- AQUEOUS SOLUTIONS
Subject Categories:
- Polymer Chemistry
- Electrochemical Energy Storage