Materials Literature
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Abstract The effects of ultrasonic irradiation on the mechanical properties, morphology, and crystal structure of polypropylene (PP)/ethylene‐propylene‐diene terpolymer (EPDM) blends were examined. Results show that appropriate irradiation intensity can noticeably increase the toughness of the PP/EPDM blends without r…
A crude plasmin extract was prepared from milk by ultracentrifugation and was partially purified using ammonium sulfate precipitation. Isothermal and high-pressure inactivation of this plasmin system at pH 6.7 could be described by a first-order kinetic model. As expected, the plasmin system displayed a high thermosta…
Abstract Polyamide‐6,6 (PA)/poly(ethylene terephthalate) (PET) blends were obtained by direct injection molding over the whole composition range. Besides the two crystalline phases, the blends were composed of a pure amorphous PET phase, and a probably pure PA amorphous phase. The crystallinity of PA and PET did not c…
Samples of interstitial free (IF) steel were heated in alumina–graphite crucibles with flux cover at 1600°C for 120 min in a medium frequency induction furnace. The carbon contents of IF steel samples taken from the molten steel at times 0, 5, 10, 20, 30, 45, 60, 90 and 120 min were examined and the refractories after…
Abstract. Poly (ethylene terephthalate)-organoclay nanocomposites were prepared via melt blending in a torque rheometer at several different clay concentrations (3; 5; 8 and 16 wt.%). Morphological and thermal properties of the nanocomposites were characterized by x-ray diffraction (XRD), transmission electron microsc…
For a compound to be classified as a volatile corrosion inhibitor (VCI), it must possess two basic properties: volatility and ability of the vapour to retard the corrosion rate. VCIs can be used in cases where other protection methods are not feasible or when protection could be very expensive. Usually, most organic c…
Abstract The thermodynamic properties of Zn13La were investigated by calorimetry. The standard entropy of formation at 298 K, ΔfS°298, was determined from measuring the heat capacities, Cp, from near absolute zero (2 K) to 300 K by the relaxation method. The standard enthalpy of formation at 298 K, ΔfH°298, was determ…
ZnO nanoparticles were prepared by a solid state pyrolysis reaction of zinc acetate dihydrate and oxalic acid dihydrate at 500°C. The course of reaction at various temperatures was followed by XRD. Subsequently varistors were fabricated from this nano-ZnO material by solid state mixing with various oxide additives and…
Abstract Magnesium–aluminum layered double hydroxide containing polysulfide anions was prepared by a hydrothermal reaction from magnesium and aluminum hydroxides. Thioacetamide was used as the sulfide source. The product exhibits light green color corresponding to the S2− and S3− ions and turns to colorless when the s…
An approach for the classification of cavity sizes based on their maximum charge transfer characteristics, applied voltage partial discharge pattern using Hidden Markov Models, is described. In these models, the partial discharge patterns for different cavity sizes are represented by a sequence of events rather than b…
Abstract Effects of bamboo fiber (BF)-esterified with maleic anhydride (MA) (BF-e-MA) on the properties of BF-filled poly(butylene succinate) (PBS) bio-composites were investigated. Adding 5% BF-e-MA increased the tensile strength of the PBS/BF (70/30) composite from 21 MPa to 28 MPa in the presence of radical initiat…
The effect of Sn substitution on the dielectric and piezoelectric properties of BiScO 3 –PbTiO 3 was investigated in the ternary system, (1- x ){(1- y )BiScO 3 – y PbO·SnO 2 }– x PbTiO 3 ( x =0.43–0.63, y =0.25–0.75). The ferroelectric phase transition temperature near morphotropic phase boundary (MPB) decreased with…
The crystal structure of annealed chevkinite-(Ce), ideally (REE,Ca)(4) Fe2+ (Ti,Fe3+,Nb)(4) Si-4 O-22, monoclinic, C2/m, crystal (2(an)) a 13.400(1), b 5.7232(4), c 11.0573(9) Angstrom, beta 100.537(2)degrees, V 833.7(2) Angstrom(3) and crystal (3(an)) a 13.368(2), b 5.7243(6), c 11.041 (1) Angstrom, beta 100.516(1)de…
'QUADOS', a Concerted Action of the European Commission, has run an intercomparison aimed at evaluating the use of computational codes for dosimetry in radiation protection and medical physics. This intercomparison was open to all users of Monte Carlo, analytic and semi-analytic codes or deterministic methods. Its mai…
Twisted nematic liquid crystal display (TN-LCD) devices, composed of nematic liquid crystal (NLC), doped with silver (Ag) nanoparticles, which are protected with the same NLC molecules of 5CB (Merck, K-15), show electrooptic characteristics that are featured by a frequency modulation and fast response. This device is…
Abstract Sulfated zirconia powders have been prepared by following a single‐step sol–gel preparative route using zirconium propoxide as the starting compound. Sulfuric acid was employed both as the sulfating agent and as the catalyst of the polycondensation reaction in the gel formation. Three different series of prec…
Abstract The anionic polymerization of ethoxyethyl glycidyl ether (EEGE) initiated by cesium alkoxide was studied. The ring‐opening polymerization of EEGE in the presence of cesium alkoxide of 1‐methoxy‐2‐ethanol does not involve any side reactions. The presence of an additional alcohol leads to a significant increase…
Abstract Thin film depositions of metallic silver were performed using metal–organic (MO) CVD on glass substrates using, as precursors, the two new compounds (1,1,1,5,5,5‐hexafluoro‐2,4‐pentanedionato)(2,2′‐bipyridine)silver( I ), [Ag(hfac)(bipy)] ( 1 ), and (1,1,1,5,5,5‐hexafluoro‐2,4‐pentanedionato)( N , N , N ′, N…
Abstract In this communication we present the first stable zwitterionic spirocyclic Meisenheimer compound based on an N→N rearrangement in the reaction between picric acid and diisopropylcarbodiimide. The structure was confirmed by single‐crystal X‐ray diffraction. Furthermore, this compound exhibits interesting fluor…
The pore size of mesoporous silica membranes is reduced using pyridine‐catalyzed SiO 2 ALD within the mesoporous matrix. The use of pyridine to catalyze the ALD results in lowering the reaction temperature to 80 °C. It also self‐limits the pore size reduction as shown in gas permeation experiments. The self‐limiting a…