Materials Literature
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A mechanism of the oxidative polymerization of aromatic amines, including the step of formation of a complex with charge transfer between quinonediimine fragments of oligomer chains and the monomer, is proposed. Quantitative characteristics of the kinetics of the oxidative polymerization of aromatic amines are theoret…
Dissipative effects in poly(vinyl alcohol) films with different molecular masses and degrees of hydration have been investigated with the use of relaxation spectrometry. The mechanical-loss peaks in the internal-friction spectrum reflect two relaxation transitions (α and β peaks) and one first-order phase transition (…
The behavior of samples of A 2 B 2 O 7 composition under irradiation with 1-MeV Kr 2+ ions was studied (A is a simulator of the REE-actinide fraction of the wastes of the treatment of used nuclear fuel and B is a quadrivalent cation of Zr, Sn, or Ti). Depending on the B elements, the samples are crystallized either in…
Phase compositions, structural features, and element distributions were studied for samples of the compositions REE2(Zr2−x Ti x )O7, which are potential matrices for immobilization of the rare earth-actinide fraction of high-level waste from spent nuclear fuel reprocessing. Samples with x up to 0.8 consist of pyrochlo…
The performed research works consider diagnosis of dierent models of support and bushing insulators. Insulator systems undergo aging processes, which causes deterioration of the insulating properties. In addition, pollutants that accumulate on the surface of high voltage insulators cause further reduction of the insul…
Plate-impact experiments were conducted to study the features and mechanisms of void nucleation and growth in the polycrystalline of pure aluminum under dynamic loading. Soft-recovered samples have been analyzed by metallographic microscopy, electron back scattering diffraction (EBSD), and synchrotron radiation x-ray…
The initial stage of mechanical alloying in Cr-Fe binary systems with atomic ratios of 80: 20 and 99: 1 (57Fe) has been studied by Auger spectroscopy, X-ray diffraction, and Mössbauer spectroscopy. Cr(Fe) x O y oxide clusters are formed at the sites of the contact between Cr and 57Fe particles at the earliest stages o…
Abstract 3D tubular scaffolds made from Poly-(Ɛ-caprolactone) (PCL)/chitosan (CS) nanofibres are very promising candidate as vascular grafts in the field of tissue engineering. In this work, the fabrication of PCL/CS-blended nanofibrous tubes with small diameters by electrospinning from separate PCL and CS solutions i…
The iterative algorithm based on resistance-capacitance (RC ) network model is put forward to eliminate the interphase interference in measuring the total leakage current of high-voltage zinc oxide arresters; this method can calculate the total leakage current and phase angle difference (the angle between voltage and…
The method of preparing biodegradable multi-liposomal containers via modification of anionic liposomes with a cationic polymer and subsequent adsorption of the obtained liposome-polymer cationic complex on the surfaces of negatively charged polylactide micelles with grafted polyoxyethylene chains is described. Liposom…
Polycrystalline of [( Na 0.535 K 0.480 ) 0.966 Li 0.058 ] (Nb 0.90 Ta 0.10 ) O 3 samples were prepared using the high-temperature solid-state reaction technique. X-ray diffraction (XRD) analysis indicates the formation of a single-phase with orthorhombic structure. AC impedance plots were used as tool to analyze the e…
Polyurethanes are widely used in biomedical devices such as heart valves, pacemaker leads, catheters, vascular devices, and surgical dressings because of their excellent mechanical properties and good biocompatibility. Layered silicate nanoparticles can significantly increase tensile strength and breaking strain of po…
In this study, a multifunctional poly(β-L-malic acid)-based nanoconjugate with a pH-dependent charge conversional characteristic was developed for tumor-specific drug delivery. The short branched polyethylenimine-modified poly(β-L-malic acid) (PEPM) was first synthesized. Then, the fragment HAb18 F(ab')2 and 2,3-dimet…
New binuclear cymantrenecarboxylate complexes of rare-earth metals, [Ln 2 (μ-O,η 2 -O 2 CCym) 2 (μ 2 -O,O′-O 2 CCym) 2 (η 2 -O 2 CCym) 2 (DMSO) 4 ] (Ln = Tb ( I ), Dy ( II ); Cym = (η 5 -C 5 H 4 )Mn(CO) 3 ) and [Ln 2 (μ 2 -O,O′-O 2 CCym) 4 (η 2 -NO 3 ) 2 (DMSO) 4 ] (Ln = Tb ( III ), Dy ( IV )), are synthesized and cha…
To study the distribution of morphological structures like fillers (such as silica nanoparticles) and their agglomerates in polymer nanocomposites, image processing technique on 2D scanning electron microscopy (SEM) image of the polymer nanocomposites was used. A suitable algorithm was proposed to determine the thresh…
Lattice Assisted Nuclear Reactions (LANR) (CF) activated nanocomposite ZrO2–PdNiD CF/LANR components are capable of significant energy gain over long periods of time with reproducibility and controllability. We report the response of such active components to steady and dynamic applied magnetic field intensities up to…
Every manufacturing process leaves waste to environment. Some waste must be controlled. Some waste can be utilized. Like the organic fertilizer plant, it leaves waste from chicken manure digestion of bacteria. The air pollution has ammonia gas and heat. The gas has to be deodorized by deodorizer tank. On the other han…
Recently, natural fibers reinforced polymer composites have been finding an extensive use in dielectric and automobile applications. So keeping in view their applications part, effect of fiber’s surface functionalization on dielectric and flammability properties of resulted unsaturated polyester (UPE) matrix based bio…
Sensitivity enhancement of OD- and OD-CNT-based humidity sensors by high gravity thin film deposition technique, Karimov, Kh. S., Fatima, Noshin, Sulaiman, Khaulah, Tahir, M. Mahroof, Ahmad, Zubair, Mateen, A.
The molecular structure of cyclohexanone was calculated by the B3LYP density functional model with 6-311++G(d,p) basis set by Gaussian program. The results from natural bond orbital analysis have been analyzed in terms of the hybridization of atoms and the electronic structure of the title molecule. The formation of h…