Evangelos Manias

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Stiff thin films on soft substrates are both ancient and commonplace in nature; for instance, animal skin comprises a stiff epidermis attached to a soft dermis. Although more recent and rare, artificial skins are increasingly used in a broad range of applications, including flexible electronics, tunable diffraction gratings, force spectroscopy in cells,(More)
Our continuing study of the mechanism of flammability reduction of polymer-layeredsilicate nanocomposites has yielded results for polypropylene-graft-maleic anhydride and polystyrene-layered-silicate nanocomposites using montmorillonite and fluorohectorite. Cone calorimetry was used to measure the heat release rate and other flammability properties of the(More)
This chapter summarizes the thermodynamics of multicomponent polymer systems, with special emphasis on polymer blends and mixtures. After a brief introduction of the relevant thermodynamic principles – laws of thermodynamics, definitions, and interrelations of thermodynamic variables and potentials – selected theories of liquid and polymer mixtures are(More)
Membrane tension modulates cellular processes by initiating changes in the dynamics of its molecular constituents. To quantify the precise relationship between tension, structural properties of the membrane, and the dynamics of lipids and a lipophilic reporter dye, we performed atomistic molecular dynamics (MD) simulations of DiI-labeled(More)
In this article we describe our continuing research on a novel nanocomposite approach for reducing gas permeability through biomedical polyurethane membranes. Nanocomposites were prepared using commercially available poly(urethane urea)s (PUU) and two organically modified layered silicates (OLS). Wide-angle X-ray diffraction experiments showed that the(More)
of poly(vinylidene fluoride-hexafluoropropylene) V. Tomer, E. Manias, and C. A. Randall Center of Dielectric Studies (CDS), Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802, USA Polymer Nanostructrures Lab—Center for the Study of Polymeric Systems (CSPS), The Pennsylvania State University, University(More)
The thermal degradation of poly(methyl methacrylate) and its nanocomposite has been studied to determine if the presence of clays (anionic and cationic) or carbon nanotubes has an effect on the degradation pathway. Nanocomposite formation has been established by X-ray diffraction and transmission electron microscopy, thermal degradation has been(More)
Effects of montmorillonite and barium titanate nanofillers V. Tomer, G. Polizos, E. Manias, and C. A. Randall Department of Materials Science and Engineering, Materials Research Laboratory, Center of Dielectric Studies (CDS), The Pennsylvania State University, University Park, Pennsylvania 16802, USA Department of Materials Science and Engineering, Polymer(More)