Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Eine Apparatur zur Untersuchung der Spannungsrißkorrosion von Stahlen in flüssigem Ammoniak unter definierten elektrochemischen Bedingungen wurde aufgebaut. Ein Rechner steuerte den Versuchsablauf und registrierte die Meßdaten. Die dazu nötigen Programme wurden entwickelt. Versuche mit Rundproben aus Schweißs…
Abstract The voltage lifetime of a poly(ethylene terephthalate)/glass composite is measured for two different orientations of short fiber with respect to the applied electric field (perpendicular and parallel). The difference in the voltage lifetime between two configurations is attributed to the microstructural featu…
Summary Monitoring of microbial corrosion is always difficult because of the sessile nature of bacteria and the lack of meaningful correlation between routine bacteria counts and bacterial activity. This problem is further aggravated in a large oilfield water system because of size and sampling difficulties. This pape…
We calculate the electric conductivity of a system consisting of parallel layers of insulator, embedded into a uniform conductor. Each layer is perforated by holes, which are arranged on a two-dimensional hexagonal lattice. We investigate various stacking patterns of the layers, in volume fractions of 40% to 50%. The…
Abstract The phthalide‐containing epoxy resins are synthesized and characterized in comparison with the bisphenol‐A epoxy resins in terms of thermal properties. Although both resins contain comparable amounts of halogens, the resulting flame retardancy is higher in the phthalide‐containing resin. The char formation up…
Birefringence, densite, mesures en calorimetrie differentielle a balayage, mesures de retrait
Measurements were made of working level ratios and the effective diffusion constants of radon daughters using a special housing designed to provide a uniform diffusional environment at the passive detectors. For 2 of 7 exposures, the measured scale of the diffusion was too large to satisfy the uniformity requirement.…
Abstract Phase separation behavior has been studied in aqueous solutions of partially butyralized poly(vinyl alcohol) (BuPVA) with various degrees of butyralization x Bu and various molecular weights. It is found that these systems exhibit both upper and lower critical solution temperatures. The theta temperatures θ L…
SUMMARY The combination of a scanning electron microscope and a microcomputer can be used to carry out automatic, quantitative, morphological analysis of a wide range of samples. A system implemented around a commercially available 8‐bit computer and interface hardware is described. Computerized analysis of shape is m…
The relation between fibre crimp and fabric quality is investigated for various fabrics of different grades. It is found that fibres taken from fabrics of good quality have a high crimp level and that fibre crimp plays an important role in yarn extensibility, compressibility, and fabric extensibility and improves fabr…
The magnetic structure and magnetic phase transitions of Sc 1- x Ti x Fe 2 with x ≧0.7 are studied from measurements of Mössbauer effect and magnetization. A coexistent state of ferro- and antiferromagnetism appears below ∼100 K for x =0.9 and below ∼200 K for x =0.75. The results suggest that this system is an itiner…
Abstract In a one‐band model, the total carrier mobility relations, deduced from the Debye‐Conwell formula and Mathiessen's rule, are compared. With the help of these two laws the resultant mobility and the thermoelectric power (TEP) kinetic term variations are given. For n‐type MoTe 2 single crystals, it is shown tha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotodecomposition of nitromethane trapped in solid argonMarilyn E. JacoxCite this: J. Phys. Chem. 1984, 88, 15, 3373–3379Publication Date (Print):July 1, 1984Publication History Published online1 May 2002Published inissue 1 July 1984https://pubs.acs.org/doi/10.1021/j150659a…
Abstract Zeolite ZSM-5 was easily synthesized by using ZSM-5 seed crystals as crystallization nuclei from acetone/water mixture system without any organic templates. A small amount of acetone in a reaction mixture inhibited formation of α-quartz and facilitated rapid crystallization of ZSM-5 under the mild hydrotherma…
Abstract The crystal of (TMTTF)2ReO4 is isomorphous with the other (TMTTF) 2X compounds(X=ClO4, PF6, Br,···). TMTTF molecules are stacked face-to face to form a zig-zag column. Although the structure of (TMTTF)2ReO4 closely resembles that of the analogous compound, (TMTSF)2ReO4, the loose intermolecular contacts in (T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical synthesis of a new polysaccharide. Ring-opening polymerization of 1,6-anhydro-2,3,4-tri-O-benzyl-.beta.-D-allopyranose and preparation of stereoregular 1→ 6)-α-D-allopyrananToshiyuki Uryu, Yoshihiro Sakamoto, Kenichi Hatanaka, and Kei MatsuzakiCite this: Macromolecu…
Hastelloy-X is a potential structural material for use in gas-cooled reactor systems. In this application, data are necessary on the mechanical properties of base metal and weldments under realistic service conditions. The test environment studied was helium that contained small amounts of H2, CH4, and CO. This enviro…
Abstract Block and random copolymers of butadiene and styrene as well as polybutadiene and polystyrene homopolymers have been investigated with respect to formation of trapped electrons, contribution of ionic species to crosslinking, and hydrogen gas evolution due to γ radiation. The decay kinetics of the disubstitute…
The role of defects in heterojunctions was investigated. The density of such defects required to pin the Fermi level or to affect the band offset was estimated using simple electrostatic considerations. We conclude that it is very unlikely that defects play any role in determining the band offsets, but they might affe…
Abstract The products resulting from the reaction of PVC with sodium benzenethiolate were degraded to 0,3% at 180°C in the solid state and at 160°C in solution in trichlorobenzene. The polyene distribution of the polymers after degradation was studied by both UV‐visible and resonance Raman spectroscopies, as a functio…