Kinetics of water sorption in Nafion thin films-quartz crystal microbalance study
Article Abstract:
The study uses quartz crystal microbalance (QCM) measurements to follow kinetics of water sorption in a thin Nafion film to clarify the discrepancy of the water transport data. The results concluded that the kinetics of water sorption in the partially hydrated Nafion exposed to water vapor is controlled by the first-order process of water transfer in and out of the nanoscopic hydrophilic regions for membranes thinner than 10 mue.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Water vapor barrier properties of transparent SnO2-SiO(sub x) composite films on polymer substrate
Article Abstract:
Composite thin films consisting of silicon oxide and tin oxide are deposited on polycarbonate substrates as gas barrier films, with the help of a thermal evaporation process in an oxygen gas environment. The chemical interaction of water vapor with oxide films is investigated by considering the refractive index obtained from ellipsometry and the OH group peak from X-ray photoelectron spectroscopy.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
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Effect of a reduced mobility layer on the interplay between molecular relaxations and diffusion-limited crystallization rate in ultrathin polymer films
Article Abstract:
The effect of the reduced mobility layer at the interface with the substrate on the crystallization rate in ultrathin polymer films is analyzed. The films have shown higher glass stability in terms of an increase of the cold crystallization temperature and of the crystallization time and the deviations from bulk behavior have vanished above a crossover temperature.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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