Materials Literature
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Interaction effects of xanthan gum (XG), carboxymethyl cellulose (CMC), and locust bean gum (LBG) on the flow properties of oil-in-water emulsions were investigated by a mixture design experiment. Blends of XG, CMC and LBG were prepared according to an augmented simplex-centroid mixture design (10 points) and used at…
Molecular orientation of a chemically linked rod-disk (cyanobiphenyl-triphenyl) liquid crystalline (LC) molecule (RD12, where 12 is a number of carbon atoms in each alkyl chain linkage between the rod and the disk mesogens) in an antiparallel rubbed LC cell was investigated under vertically applied alternative current…
Abstract Regular arrays of metal nanoparticles on metal films have tuneable optical resonances that can be applied for surface enhanced Raman scattering or biosensing. With the aim of developing more surface selective geometries we investigate regular gold nanoparticle arrays on 25 nm thick gold films, which allow to…
Dynamic vulcanization of high-density polyethylene and ethylene vinyl acetate (HDPE/EVA) blends (50/50 wt%) in the mixing chamber of a torque rheometer was investigated. EVA was selectively cross-linked within the HDPE phase by transesterification reaction between ester groups of the EVA and alkoxysilane groups of tet…
Abstract Quantitative analysis of reacted silanol groups in silica nanoparticles modified chemically with monochlorosilanes was performed by 1 H NMR after treatment with cesium fluoride. Silica nanoparticles were modified chemically by the reaction between the silanol groups and monochlorosilanes, and the structure of…
Abstract The dynamics of stationary air drawing in the melt blowing of nonwovens were determined on the basis of a single‐filament model in a thin‐filament approximation that accounts for polymer viscoelasticity, heat of viscous friction in the polymer bulk, and surface energy. Predetermined distributions of the air v…
A classical model potential to simulate pyrrole oligomers in condensed phases is developed in this work. The new potential contains ten parameters that are optimized on a database of energy points calculated within the density functional theory approach. Based on this potential the condensed phase of systems composed…
Abstract Polymer crystallization is complex and difficult to model, especially when it is non‐isothermal and even more so when describing cold crystallization. In most cases, two different processes occur, so‐called primary and secondary crystallization. In the literature, two assumptions are generally made. Firstly,…
Glasses of the system xGd2O3 · (100 − x)[7GeO2 · 3PbO] with 0 ≤ x ≤ 40 mol% were prepared using the melt quenching method. Lead germanate glasses are particularly interesting in the context of the germanate anomaly. In this paper, we investigate changes in the coordination number of germanium in gadolinium–lead german…
Abstract The toluene diisocyanate based optically active chiral polyurethanes were synthesized according to the symmetry conditions. The noncentrosymmetric (both charge asymmetry and spatial asymmetry) environment were attained by the incorporation of the chiral units (diethyl‐(2R,3R)(+)‐tartrate) and donor‐acceptor b…
Abstract Free radical graft polymerization has been used as a modification method to incorporate functional groups into polyolefins using a melt‐mixing process. In this work, modification of polybutene‐1 (PB) was performed by limonene radical graft polymerization using the Nd 2 O 3 /dicumyl peroxide (DCP) radical init…
This article has been retracted. A statement of retraction is published in Mod. Phys. Lett. B Volume 28, Issue 26 (2014) http://dx.doi.org/10.1142/S0217984914930014
The importance of studying oral drug absorption is well recognized by both research facilities/institutions and the pharmaceutical industry. The use of mathematical models can represent a very profitable and indispensable tool to understand oral drug absorption. Indeed, mathematical models can verify the correctness o…
The phase behavior of binary mixtures containing hyperbranched polyester Boltorn U-3000 and organic solvents such as hydrocarbon, ether, and linear aliphatic 1-alcohol was studied in the temperature range from about 250 K up to the boiling point of the solvent. The polymer is completely soluble in hydrocarbons (hexane…
Zum Ersten, zum Zweiten und zum …︁ Homokonjugierte Push-pull-Chromophore wurden in einer [2+2]-Cycloaddition von 2,3-Dichlor-5,6-dicyan-p-benzochinon mit Anilino- oder Ferrocen-Donor-substituierten Alkinen erhalten, darunter eine Spiroverbindung (Bild: Beispielstrukturen mit zugehörigen Elektronenabsorptionsspektren;…
Titania-poly(vinylpyrrolidone) (PVP) core-shell nano/microfibers are electrospun on substrates of differing hydrophilicity and conductivity in order to investigate the connection between these substrate properties and the apparent water contact angles against the fiber mats. The focus of this study compares current da…
Partial acetylation of the amine-terminated poly(amidoamine) dendrimer has been used in the preparation of dendrimer particles conjugated with a wide variety of functional ligands including targeting moieties, therapeutic agents, and dye molecules. The effectiveness of mass transport during the partial acetylation rea…
Silver nanoparticles has been prepared by the <TEX>$\gamma$</TEX>-irradiation and in situ reduction methods. Based on the Raman spectra, TEM images, X-ray Diffraction (XRD) patterns and UV-vis spectra, the in situ reduction method is more stable and the average size of the silver nanoparticles is also smaller than by…
Abstract As follows from Raman studies, the formation of cadmium chalcogenide nanocrystals in borosilicate glass under thermal treatment at 625–700 °C can be accompanied by precipitation of elemental Se or Te in the form of molecular Se 2 or Te 2 clusters or larger aggregations. The clusters are in most cases formed w…
We consider the thermal expansion, change in sound velocity with pressure and temperature, and the Poisson ratio of lattices which have rigid units (polyhedra very large stiffness to change in bond-length and to bond-angle variations) connected to other such units through relatively compressible polyhedra. We show tha…