Materials Literature
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Abstract The effect of hydrogen bonding on the diffusivities of two almost identical fluorescent probes through polyamides was examined using fluorescence recovery after photobleaching (FRAP). The two molecules have the same geometry and a negligible difference in their molecular weight, the main difference confined i…
DOI: 10.17014/ijog.v5i4.105In order to gain insights into the detailed physical disintegration characteristics of various types of mudrock, a series of static slaking exposure and immersion tests were carefully carried out in this study. The intent of this paper is to exhaustively describe and discuss the results of t…
-thick-CuO:S film has been prepared on a glass substrate by a chemical bath deposition in an aqueous solution containing copper(II) nitrate, ammonium nitrate, and ammonia water at . The CuO:S films possessed a monoclinic lattice and bandgap energy of , which were characteristic of semiconductor CuO. The deposition mec…
The damping and mechanical properties of ethylene-vinyl acetate rubber (EVM)/nitrile butadiene rubber (NBR) blends, with BIPB (bis (tert-butyl peroxy isopropyl) benzene) as curing agent, were investigated by DMA. It was proved by mechanical performance, DMA and crosslink density data that a chemical crosslinking react…
A poly(phenylene ethynylene) conjugated polymer (PPE-NMe(3)(+)-COO(-)) containing tetraalkylammonium groups and carboxylate groups has been synthesized by Sonogashira coupling. Due to the presence of the strong cationic and weak anionic pendant units, the polymer undergoes a pH-induced transition from cationic polyele…
The anode-supported solid oxide fuel cells (SOFCs) with an yttria-stabilized zirconia (YSZ) electrolyte have been successfully prepared by the sequential steps of fabricating technique including tape casting, spin coating, and screen-printing. Two types of the SOFCs are manufactured and their cell performances are cha…
Low carbon steel substrates were covered with a γ-glycidoxypropyltrimethoxysilane (γ-GPS) modified epoxy layer. Electrochemical impedance spectroscopy and attenuated total reflection infrared spectroscopy were used to investigate the barrier properties of the coating. The resistance of the samples to ion transport pro…
Abstract The melting/crystallization behavior and isothermal crystallization kinetics of high‐density polyethylene (HDPE)/barium sulfate (BaSO 4 ) nanocomposites were studied with differential scanning calorimetry (DSC). The isothermal crystallization kinetics of the neat HDPE and nanocomposites was described with the…
Abstract The morphology, thermal, mechanical, and dielectric properties of high‐performance poly(etheretherketone)/Si 3 N 4 nanocomposites fabricated by hot pressing were investigated. It was found that the coefficient of thermal expansion (CTE) and dissipation factor decreased significantly with increasing Si 3 N 4 c…
Pure melts of asymmetric diblock copolymers are studied by means of the off-lattice Gaussian disphere model with Monte-Carlo kinetics. In this model, a diblock copolymer chain is mapped onto two soft repulsive spheres with fluctuating radii of gyration and distance between centers of mass of the spheres. Microscopic i…
Novel biodegradable three-dimensional composites with a porous structure have been prepared by coagulation of a chitosan (CS)/poly ethylene glycol (PEG) solution in NaOH. It is confirmed that PEG acts not only as a modifier to improve the mechanical properties, but also as a porogen for the CS matrix to induce porous…
Abstract A charge‐coupled device (CCD) camera was used to observe n‐butane‐blown low‐density polyethylene (LDPE) foams at the extrusion die exit. The effects of butane content, nucleating‐agent (talc) content, aging modifier (glycerol monostearate), die temperature, and die geometry on the initial expansion behavior o…
Abstract We carry out further study of the constitutive laws for Cosserat plates developed by Altenbach and Eremeyev. In particular, we examine the problem of choice of the micropolar material coefficients. Requiring that the constitutive matrix is positive definite, we establish some bounds on values of micropolar co…
Abstract Systemic investigation of the influence of the plain and functionalized carbon nanotube (CNT) contents on the ultradrawing properties of ultrahigh molecular weight polyethylene/carbon nanotubes (UHMWPE/CNTs, FC y ) and UHMWPE/functionalized CNTs (FC f x ‐y ) as‐prepared fibers are reported. In a way similar t…
Abstract The shape‐memory (SM) behavior of ethylene‐1‐octene copolymer (EOC) reinforced by carbon black (CB) was investigated. Two CB types, N110 and EC600, with different structure and specific surface area were used as conductive fillers. The mechanical tests showed that on addition of CB into EOC, modulus and stren…
A novel series of polar ferroelectric Aurivillius oxides, containing Sc3+ in the B-site, were synthesized. The ferroelectric to paraelectric phase transition temperature (Tc) obtained from dielectric measurements range from 270−400 °C. Polarization vs electric field measurements on bulk samples revealed that remanent…
Six [Fe(8)(μ(4)-O)(4)(μ-4-R-pyrazolato)(12)X(4)] complexes containing an identical Fe(8)(μ(4)-O)(4) core have been structurally characterized and studied by Mössbauer spectroscopy. In each case, an inner μ(4)-O bridged Fe(III) cubane core is surrounded by four trigonal bipyramidal iron centers, the two distinct sites…
Abstract Eu2+ ion-doped oxynitride phosphor, (Sr0.5Ba0.5)Si2O2N2:Eu2+, was prepared by solid-state reaction using metal alloy as precursor. Owing to the relatively high activity of the metal alloy precursor compared with the inert Si3N4, a single phase of solid solution phosphor (Sr0.5Ba0.5)Si2O2N2:Eu2+ was easily obt…
Amorphous (ZTO) films were radio frequency-magnetron sputtered on glass substrates at room temperature in pure Ar. Postdeposition oxidation and subsequent forming gas reduction annealing at increased electron concentration, mobility, and transmittance of the amorphous ZTO films simultaneously. Neither forming-gas nor…
The aim of this study was to analyze if and how monolayers of TiO(2) particles could be directly formed at the air/water interface and if these monolayers could be transferred to a solid surface. TiO(2) particles with diameters of 300 nm, 500 nm, 1 μm, 5 μm, 10 μm, and 20 μm formed stable monolayers at pH 2. At low su…