Materials Literature
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En este trabajo se estudio la compatibilidad en mezclas de Poliamida-6 (PA) y diferentes polietilenos: polietileno de altadensidad (PEAD), polietileno de baja densidad (PEBD) y polietileno lineal de baja densidad (PELBD). Se utilizo un copolimeroestireno-etileno/butileno-estireno funcionalizado con dietil maleato como…
Dimenzijske spremembe levo-desnega kulirnega pletiva z vpleteno elastomerno prejo
A novel vanadate-compound Ca10Li(VO4)7 was synthesized by using solid-state reaction. Phase purity and crystal structure of\nCa10Li(VO4)7 were determined by X-ray powder diffractions and the Rietveld refinement analysis (R3c, Z = 6, a = 10.8223(1) nm, c =\n38.0451(7) nm). By doping with Eu3+, Ca10-1.5xEuxLi(VO4)7 phos…
Pharmaceutical cocrystallisation has gained importance from both academic as well as industrial aspect as a technique for physicochemical property enhancement. This paper focuses on concepts, design strategies, methods of preparation, scale up and evaluation of pharmaceuticl cocrystals. Some examples of pharmaceutical…
Chain microstructures and supramolecular structures of nitrile-butadiene rubbers are studied by ESR spectroscopy. On the temperature dependences of the rotational mobility (correlation time c ) of paramagnetic probe 2,2,6,6-tetramethylpiperidine-1-oxyl, relaxation transitions are observed. It is shown that there is a…
The chemical interaction of organosilicon compounds and copolymers of ethylene with vinylacetate and copolymers of ethylene with vinylacetate and maleic anhydride was studied by IR-spectroscopy absorption and attenuated total reflection (ATR).An enrichment of the surface layers of polymers by siloxane phase was found,…
Organic-inorganic materials have been synthesized by photoinitiated copolymerization of monomers: acrylonitrile, acrylamide and 3-sulphopropyl acrylate potassium salt in the presence of sol-gel systems based on tetraethoxysilane. Thermal stability, water uptake and ion-exchange capacity of obtained materials have been…
Flat plates of poly(allyl(p-allylcarbonate) benzoate) obtained via photopolymerization and thermal polymerization have been studied by means of microindentation. The plates were about 3 mm thick. The values of microhardness ( MHV)/total microhardness (MHT) have been determined. Accordingly, structural changes in the p…
Abstract The selection of the appropriate corrosion inhibitor and the adequate injection rate is a important component of a successful corrosion inhibition program of a carbon steel used in an effluent water injection system in North Kuwait oil fields to prevent and control internal corrosion. Before proceeding to fie…
Nanoemulsions are the emulsions of O/W type, having the size range of several microns. Nanoemulsions are clear, thermodynamically stable, isotropic liquid mixtures of oil, water, surfactant and co-surfactant. They are prepared by using the surfactants which are considered safe for the human use and approved by the FDA…
On the base of statistical analysis of published data on the mechanical properties there established correlation relationships of tensile strength, elongation, necking with the chemical composition of titanium alloys of different classes.
A new photoluminescent polymer with a high thermal stability and superior color conversion ability was synthesized from a Suzuki coupling reaction, and its physical and optical properties were investigated. The applicability of the synthesized polymer as a color conversion material was also examined. A color filter wa…
This paper presents a numerical modelling study on the simulation of the cracking process and fracture energy in concrete under high strain rate. To capture the stress wave effect and the damage evolution at the meso-length scale, both a homogeneous model with a millimetreresolution mesh and an explicit heterogeneous…
IInsulation material is generally used for preventing heat loss from heat transport fluids, and water absorption severely reduces the insulation property. The purpose of this study is to evaluate the amount of water absorption supplied by the pouring method and spraying method, to investigate the effects of water abso…
The reactivity of different -alkylacroleins has been described by semi-empirical quantum chemistry methods, their optimal geometric structure has been determined and heat of formation, as well as dipole moments of the molecules have been calculated. Theoretically calculated -alkylacrolein parameters are in a good agre…
Nanostructured titania was synthesized by colloidal and polymeric sol-gel routes. Stable colloidal and polymeric titania sols were prepared by adjusting the proper values of the acid/alkoxide and the water/alkoxide molar ratios. The properties of sols were determined by dynamic light scattering technique and synthesiz…
Cross-linking of epoxy-oligomeric mixtures has been studied at room temperature and at heating to 383, 403 and 423 K for 15, 30, 45, 60 and 75 min in the presence of polyethylenepolyamine. The mixtures consist of industrial ED-20 epoxy resin, oligoesteracrylate TGM-3 and carboxy-containing derivative of ED-24 epoxy re…
In the present research, SiO 2 -TiO 2 nanostructure films were successfully prepared on windshields using the sol-gel technique for photocatalytic applications. To prevent the thermal diffusion of the sodium ions from the glass to TiO 2 films, the SiO 2 layer was pre-coated on the glass by the sol-gel method. The subs…
Abstract: In this paper we obtain some subordination and superordination results involving certain new generalized operators for certain subclasses of analytic functions in the open unit disk. Our results improve previously known results.
Cyanobacteria can produce extracellular polysaccharides (EPS) and release them to the environment, which is one of the adaptive mechanisms of cyanobacteria evolved to face complicated and variable environment. As a protective barrier between cell and environment, the EPS play a protective role against desiccation, ult…