56 research outputs found
Effect of the acrylic acid content on the permeability and water uptake of latex films
Full text linkAcrylic acid (AA) is a monomer commonly employed in emulsion polymerization
to provide electrostatic colloidal stability and improve specific film
performance. The addition of AA not only modifies the kinetics of the
polymerization, but also it takes part in the interaction between colloidal
particles, which has a strong influence on their packing and consequent latex
film properties. In this contribution a theoretical modeling of the latex film
formation is presented and compared to experimental results: water vapor
permeability and latex film capacitance are studied as a function of AA
content. It has been shown that water uptake is mainly affected by film
morphology which in turn is defined by intercolloidal interaction and drying
rate.Comment: 16 pages, 7 figure
Simulation of atomic force microscopy of fractal nanostructured carbon films
No full textThe fractal properties of nanostructured carbon films as derived from
atomic force microscopy are theoretically investigated by classical
molecular dynamics. The non-trivial role of the tip radius in the
experimental
determination of the fractal exponents is elucidated
Doppler, NST, and biophysical profile changes in severe IUGR - a longitudinal prospective randomized study Ultrasound in Obstetrics and Gynecology
No full textTemporal sequence of hemodynamic changes in severe IUGR fetuses: a randomised study Ultrasound in Obstetrics and Gynecology
No full textDoppler, cardiotocography and biophysical profile score in diopathic IUGR fetuses and in IUGR fetuses because of maternal preeclampsia
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Non-invasive diagnosis of fetal anemia due to maternal-fetal hemorrhage by Doppler assessment of the middle cerebral artery peak systolic velocity waveform.
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