Materials Literature
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Up to now, there have been few studies of the temperature-induced liquid–liquid structure transition (LLST) kinetics for atomic systems. In this paper, through isothermal and heating experiments, we have investigated the kinetics of the LLST process in Pb–Sn61.9 wt% melt by measuring the electrical resistivity and hea…
Abstract Stoichiometric and nonstoichiometric polyelectrolyte complex (PEC) was prepared with polyethylene glycol‐monosuccinate (PEGMS), and chitosan (CS). A series of PEGMS were synthesized by a 1 : 1 mol ratio between PEG and succinic anhydride. Then, the novel PEC was prepared by a various mole reaction of the abov…
The authors report the formation of the metallic oxide p-I-n junctions with the ferroelectric (Ba,Sr)TiO3 (BST) as the barrier. The junctions with different thicknesses of BST are investigated. With appropriate thickness, the junctions possess definite parameters, such as the negligible reversed current density (⩽10−7…
Abstract Three novel hyperbranched polycarbosilazanes were synthesized via hydrosilylation reaction and characterized by FT‐IR, 1 H NMR, 13 C NMR, 29 Si NMR, and laser light scattering. First, one AB 4 type monomer bis( N , N ‐diallylamino)‐methylsilane ( M1 ) and two AB 2 type monomers ( N , N ‐diallylamino)‐dimethyl…
In this letter the authors report the growth of (110) oriented La0.7Sr0.3MnO3 films on (0001) single-crystal sapphire substrate. Growth of La0.7Sr0.3MnO3 (LSMO) films with a fixed orientation was achieved by carefully controlling the deposition conditions, specifically the substrate temperature. The fixed orientation…
Thin films of Nd3+∕Zr4+ cosubstituted Bi4Ti3O12 (BIT), i.e., Bi3.15Nd0.85Ti2.8Zr0.2O12 (BNTZ), were fabricated on Pt∕Ti∕SiO2∕Si(100) substrates by chemical solution deposition and annealed at different temperatures of 600, 650, 700, and 800°C. The effects of annealing temperature on the microstructure, leakage current…
Abstract NMR spectroscopy has served as a powerful tool to discriminate between the various types of subunits present in hyperbranched polymers. This discrimination is critical for the determination of degree of branching ( DB ), which is an important structural parameter that distinguishes hyperbranched structures fr…
Abstract Polypropylene/Ethylene–Octene copolymer (PP/EOC) blends were prepared by melt blending technique followed by compression molding. The effect of addition of EOC on the mechanical behavior of the PP matrix was investigated. Tensile and flexural strengths decreased with the incorporation of EOC. However, the imp…
Thermodynamic analysis shows that 180° ferroelectric domains under an external electric field behave as elastic domains due to the converse piezoelectric effect. The interdomain elastic interaction between 180° ferroelectric domains is an important factor in determining the effective dielectric and piezoelectric respo…
The frequency dependence of the dynamical-mode locking phenomena in the ac driven dissipative Frenkel-Kontorova model is studied by the molecular-dynamics simulations. It was found that the Shapiro steps exhibit very strong frequency dependence influenced by the amplitude of ac force. At the low frequencies, in the la…
The electronic energy band structure and linear optical properties of the ferroelectric semiconductor SbSI in the paraelectric phase are calculated by an ab initio pseudopotential method using density functional theory in the local density approximation. The calculated electronic band structure shows that SbSI has an…
Abstract The copolymerization of indole (In) and 3‐methylthiophene (3MeT) was successfully achieved electrochemically in boron trifluoride diethyl etherate (BFEE) by direct anodic oxidation of the monomer mixtures on stainless steel electrodes although their respective oxidation potentials were quite different. The el…
Abstract Polymer/layered silicate nanocomposites were prepared, adding modified, and nonmodified montmorillonites to a resol resin. It was observed that the composites exhibited an intercalated disordered structure by means of X‐ray diffraction (XRD) and transmission electronic microscopy. The crosslinking density of…
Abstract A series of novel polyhedral oligosilsesquioxane nanofiller compounds functionalized with hydrogen‐bond acidic sensor groups was prepared, characterized by IR, 1 H‐, 13 C‐ and 29 Si‐NMR, and MALDI‐TOF MS, and formulated into polymer coatings for 500 MHz surface acoustic wave sensor platforms. Sensor responses…
The magnetoelasticity and magnetoplasticity behaviors of a Ni–Co–Mn–In ferromagnetic shape memory alloy (FSMA) induced by the reverse phase transformation interplayed under multiple (temperature, magnetic, and stress) fields were captured directly by high-energy synchrotron x-ray diffraction technique. The experiments…
The authors propose a method to control the viewing angle of a liquid crystal (LC) panel using dual-mode switching. To realize both wide viewing angle (WVA) characteristics and narrow viewing angle (NVA) characteristics with a single LC panel, the authors use two different dark states. The LC layer can be aligned homo…
Abstract Base oils with different compositions and different degrees of refining have been subjected to three types of oxidation stability tests in the presence of antioxidants. A higher degree of refining of base oils depletes the natural antioxidants present in oils of lower degree of refining. However, the results…
Abstract Dibutylamine‐terminated ε‐caprolactone oligomers (CLOs: CLOL, CLOM, and CLOH) with number–averaged molecular weight ( M n ), 500, 1300, and 2200, respectively, were synthesized by the ring‐opening polymerization of ε‐caprolactone initiated by 2‐(dibutylamino)ethanol in the presence of tin(II) 2‐ethylhexanoate…
Abstract Numerous specimens of a linear low density polyethylene sample were uniaxially deformed up to different elongations to study the double yield phenomenon. Extruded samples were analyzed to calculate the crystallinity and to estimate the mean crystal size, under stressed state and released state (after removal…
Abstract Blends of poly(methyl methacrylate) (PMMA) with different composition viz., 5, 10, 15, and 20 wt % of ethylene‐vinyl acetate (EVA) copolymer were prepared by extrusion in a corotating twin screw extruder. These prepared PMMA/EVA blends have been characterized for physicomechanical properties such as density,…