Materials Literature
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Development of a metal/organic-semiconductor Schottky junction as an alternative to the metal/inorganic-semiconductor junction is reported. Metal/polypyrrole (PP) junctions have been prepared with electrochemically deposited doped PP films of different thickness and various metals (In, Sn, Ti, and Al) as electrodes. T…
Abstract The solubility behaviors of polymethyacrylonitrile (PMAN), poly(methacrylic acid) (PMAA), and its random copolymer methacrylonitrile (MAN)/methacrylic acid (MAA) in various solvents were investigated. The results were used in a computer program to obtain a 3‐dimensional representation of the polymer solubilit…
Abstract Plasticizer migration from flexible poly(vinyl chloride) comprises an important aspect, especially when packaging foodstuffs and pharmaceuticals. Much of the published work has been intended either to correlate migration into simulants with that into foods or to study migration into simpler extractants, enabl…
Abstract Nitrogen‐containing derivatives obtained from dialdehyde celluloses were prepared under different pH conditions. On the basis of the results from an analytical data and IR absorption spectra of the products, the structure and characterization of nitrogen‐containing products are discussed and also evaluated co…
Abstract The crystal orientation in injection molding of talc‐filled polypropylene has been studied by means of polarizing microscopy and X‐ray diffraction measurements. The plate planes of talc particles are aligned parallel to the surface of injection molding. The c‐ and a *‐axes of polypropylene crystals are bimoda…
The hind claws of 10 heifers, 10 second-calf cows, and 10 mature cows in the University of Saskatchewan's dairy herd were examined on four consecutive occasions, four and two months before calving, at calving, and two months after calving. A high prevalence of haemorrhages was observed in the sole of the claws, and th…
Selective area epitaxy and growth over patterned substrate using chemical beam epitaxy (CBE) were investigated. Truly selective area epitaxy with no deposition over the SiO2 masks has been routinely obtained with excellent epilayer morphology. Uniform coverage was obtained for regrowth over etched mesas to form buried…
State of the Art. The Anchor System: Components and Installation. Special Anchor Systems. The Transfer of Load and Modes of Failure. Design Considerations. Corrosion and Corrosion Protection. Stressing, Testing, and Acceptance Criteria. Uses and Applications. Design Principles of Anchored Structures. Design Examples.…
IR absorption spectroscopy is an important laboratory tool and can be used to check industrial devices, be it to characterize surface pollution or to get important information about scales and corrosion products. With the new possibilities offered by Fourier transform spectrometers, a few nanograms of material may be…
We measured the pump-probe spectrum of the Sm2+ ion in three materials: CaF2, SrP2, and SrCl2. The onset of the observed prominent excited-state absorption band is consistent with an electrostatic model for impurity levels in a solid-state material.
In order to expand and clear the applicable range of the coulostatic method to measure the metal corrosion rate in solution, the method was tested by measuring the corrosion rate of iron in water containing three types of inhibitor, i.e., potassium chromate, polyphosphate with calcium ion and sodium nitrate, in stagna…
Quasi-static and dynamic penetration tests were conducted using thin metal sheets of extra-super duralumin, corrosion-resistant aluminum alloy and cold-rolled carbon steel. The phenomenon before crack initiation differed from that after the initiation. Therefore, formulae for estimating the energy-absorbing capacity w…
In this paper the relationship of ageing time to tensile strength and ultimate elongation of rubber vulcanizates was derived from the combination of ageing kinetics with the molecular theory of ultimate tensile strength of elastic networks, based on the micro-structure model of rubber vulcanizates. According to this r…
The monolithic solid‐oxide fuel cell (MSOFC) is a promising electrochemical power generation device that is currently under development at Argonne National Laboratory. The extremely high power density of the MSOFC leads to MSOFC systems that have sufficiently high energy densities that they are excellent candidates fo…
The influence of Mo content variation approved in the standard in Type 316 stainless steel was investigated electrochemically to the localized corrosion characteristics in chloride solution. The shift in pitting potential Vc′ 10, which corresponds to film breakdown, was changed a little by decreasing content of Mo in…
Abstract The nitration capabilities of a range of chemical celluloses, including some containing the cellulose‐II polymorph, were examined. The cellulose samples, derived from Pinus radiata wood by bisulphite, prehydrolysis‐kraft or kraft pulping, were compared with a commercial nitration‐grade cellulose and two bleac…
A Landau theory is used to determine the order-parameter vibrational modes in the high-temperature incommensurate charge-density-wave phase of ${\mathrm{NbTe}}_{4}$. The dispersion relation is found to exhibit a soft mode consistent with the occurrence of a continuous incommensurate- to incommensurate-phase transition…
It is well known that reduced sulfur species lead to intergranular attack (IGA) of sensitized Alloy 600 at low temperature, however the effect of these species on Alloy 600 at high temperature is not clear. Static autoclave tests were performed to investigate the effect of reduced sulfur (CaS2O3) on the high temperatu…
Effects of organosulfur compounds (thioethers, thiophosphites, and thiophosphates) and organotin compounds as additives on the thermal decomposition of polypropylene were studied. Organosulfur compounds which have electron-donating substituents to sulfur atoms accelerated the thermal decomposition of polypropylene. Ap…
The results of thermal conductivity measurements κ ‘ Turbostratic Boron Nitride in the temperature range 80–380 K are cited. Measurements were carried out on two pressed Boron Nitride samples, for which the degree of three‐dimensional ordering of the given powder is equal to 0.298 and 0.345. For theoretical descriptio…