Materials Literature
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In the first part of this two-part paper we reported on the development of a novel test method to evaluate the performance of inhibitors for underdeposit corrosion under sweet (carbon dioxide [CO2]) conditions for oil and gas applications. The use of a multi-electrode array enables examination of the effect of varying…
Abstract The fractionated crystallization and self‐nucleation behavior of poly(ethylene oxide) (PEO) component in the miscible PEO/poly(3‐hydroxybutyrate) (PHB) binary blends were investigated using differential scanning calorimetry (DSC) and small‐angle X‐ray diffraction (SAXS) under different crystallization conditi…
The effect of aluminium content on the formation mechanism, volume fraction, morphology, and particle size distribution of graphite has been investigated. Addition of aluminium to ductile iron causes some fundamental changes in iron—carbon phase diagrams and, as a result, improves graphite formation during eutectic tr…
Multiscale simulations of nanotube-based nanoelectromechanical systems (NEMS) controlled by a nonuniform electric field are performed by an example of a gigahertz oscillator. Using molecular dynamics simulations, we obtain the friction coefficients and characteristics of the thermal noise associated with the relative…
Magnetic and magnetocaloric properties of the intermetallic compound Er3Co have been studied. Temperature dependence of magnetization data shows that it exhibits ferromagneticlike bulk magnetic ordering at 14 K. For field changes (ΔH) of 20 and 50 kOe, the maximum values of isothermal magnetic entropy change are found…
Copolymers of L-lactic acid (LA) and 2-pyrone-4,6-dicarboxylic acid (PDC), a chemically stable metabolic intermediate of lignin, were prepared by dehydrated polycondensation based on stepwise oligomerization followed by post-polymerization in vacuo. When the polymerization was performed in the presence of methanesulfo…
Novel azobenzene polyelectrolytes have been used to fabricate biocompatible self-assembled multilayer (SAMU) thin films of variable absorbance, thickness, organization, and morphology. The prepared SAMU films are useful for directed cell growth, and this application relies directly on control of contact and surface en…
A series of fluorescent sensors based on 8-hydroxyquinoline dansylate as core and dendritic PAMAM as shell were synthesized. Their fluorescence characteristic and fluorescent sensing behavior toward metal ions were studied in water/methanol (1: 1, v/v). The sensors exhibit good selectivity and sensitivity for Fe(3+) i…
An overview is given of the key role for reduction of hydrogen ions and water in determining the local chemistry and electrochemistry in crevices and cracks. Thus, the ability to cathodically protect long, tight crevices and cracks is explained on the basis of depletion of oxygen but also on the slower kinetics for hy…
Abstract Using 2‐acrylamide‐2‐methyl propane sulfonic acid (AMPS), itaconic acid (IA), and N ‐vinyl‐2‐pyrrolidone (NVP) as monomers, a new retader terpolymer AMPS/IA/NVP (PAIN) was synthesized by free radical aqueous solution copolymerization and characterized by FTIR and H‐NMR. Through the orthogonal experiment, the…
Abstract The poly(ε‐caprolactone) (PCL)/starch blends were prepared with a coextruder by using the starch grafted PLLA copolymer (St‐ g ‐PLLA) as compatibilizers. The thermal, mechanical, thermo‐mechanical, and morphological characterizations were performed to show the better performance of these blends compared with…
A previously unknown modification of dicopper(I) triselenostannate(IV), Cu(2)Se(3)Sn, has been obtained from the Cu(2)Se-SnSe(2) quasi-binary system and investigated using X-ray single-crystal diffraction. The Se atoms are stacked in a closest-packed arrangement with the layers in the sequence ABC. The Cu atoms occupy…
Abstract A series of photoinitiator‐free photosensitive polyimides (PSPIs) with lower dielectric constants have been synthesized by reaction of fluorine aromatic diamine, 2,2′‐bis(3‐amino‐4‐hydroxyphenyl)hexafluoropropane diamine (AHHFP) with 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride (BTDA) and a mixture of va…
The method of Rey [Rey, J. Chem. Phys. 126, 164506 (2007)] for describing how molecules orient toward each other in systems with perfect tetrahedral molecules is extended to the case of distorted tetrahedral molecules of c(2v) symmetry by means of introducing 28 subgroups. Additionally, the original analysis developed…
Abstract Thirteen triazole polymers were prepared as potential rocket propellant binders by the reactions of various diacetylenes and diazides. The reaction of E300 dipropiolate ( 1 ) with diazide ( 2 ) obtained from tetraethylene glycol was selected to study the effects of concentration of the tetraacetylene function…
Abstract A novel acrylonitrile acrylate copolymer coating was proposed to improve the UV irradiation resistance of poly(vinyl chloride) (PVC) sheets. Its effect on the photoageing properties of the sheets was evaluated by means of Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), yell…
The paper aims to provide a brief and comprehensible overview of the current understanding of twin nucleation and growth in structural metallic materials with a hexagonal close-packed crystal structure. It describes possible experimental methods to improve this understanding, which is required to implement twin nuclea…
Abstract Different contents of SrAl 2 O 4 :Eu,Dy, one of the long afterglow phosphorescent materials with high brightness, were melt‐mixed with low‐density polyethylene (LDPE) and Polymethyl methacrylate (PMMA) polymers, respectively. The morphology and composition of the samples were observed by means of a scanning e…
Giant oscillations in spin-dependent tunneling resistances as a function of MgO barrier thickness $({t}_{\text{MgO}})$ were observed for fully epitaxial magnetic tunnel junctions with Heusler alloy ${\text{Co}}_{2}{\text{Cr}}_{0.6}{\text{Fe}}_{0.4}\text{Al}$ electrodes and a MgO barrier. The oscillations in tunneling…
The optical properties of nanoparticles (NPs) near metal surfaces must be better understood in order to fully exploit their signal-enhancing capabilities in optical biosensors, such as in surface plasmon resonance studies. We use angle-resolved SPR imaging and a modified Maxwell−Garnett model to determine the optical…