Positron annihilation lifetime spectroscopy study on epoxy moisture absorption

Positron annihilation lifetime spectroscopy was used to study the effect of water uptake on the free volume of a commercial epoxy exposed to atmospheres with relative humidity ranging from 30.5% to 95.8%. The absorption process was also analyzed by gravimetric measurements. When exposed to humidity...

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Bibliographic Details
Published in:Journal of physics. Conference series 2013-01, Vol.443 (1), p.12055-4
Main Authors: Gordo, P M, Luis, J M M, Marques, M F Ferreira, Naia, M Duarte, Morais, J J M
Format: Article
Language:English
Subjects:
Absorption
Constants
Exposure
Gravimetric analysis
Humidity
Moisture
Moisture absorption
Physics
Positron annihilation
Relative humidity
Spectroscopic analysis
Spectroscopy
Spectrum analysis
Uptakes
Water chemistry
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Summary:Positron annihilation lifetime spectroscopy was used to study the effect of water uptake on the free volume of a commercial epoxy exposed to atmospheres with relative humidity ranging from 30.5% to 95.8%. The absorption process was also analyzed by gravimetric measurements. When exposed to humidity the mean hole volume remains constant and the number of holes not occupied by water molecules decrease with increasing of both the exposure time and the relative humidity as indicated by the constancy of τ3 and the decrease of I3.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/443/1/012055