Journal
CORROSION SCIENCE
Volume 51, Issue 12, Pages 3000-3006Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2009.08.029
Keywords
Polymer; Electronic materials; IR spectroscopy; Kinetic parameters
Funding
- National Natural Science Foundation of China (NNSFC) [20704008]
- Specialized Research Fund for the Doctoral Program of Higher Education of China (SRFDP) [20070246001]
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In this investigation, water sorption behaviour of six epoxy systems with different chemical structure of amines and epoxies were monitored at five temperatures ranging from 35 to 75 degrees C. The sorption process was analyzed by gravimetric measurements, positron annihilation lifetime spectroscopy (PALS), and attenuated total reflection Fourier transform infrared spectroscopy (ATR-IR). PALS measurements showed that the free volume fraction is not a decisive factor in governing the equilibrium water content, while the polarity of the system is the essential factor. ATR-IR curve fitting were consistent with the theoretical calculated results, and correlated to the diffusion coefficients from gravimetric measurements. (C) 2009 Elsevier Ltd. All rights reserved.
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