Materials Literature
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The filtration performance of nonwoven thick synthetic fabrics used in soil stabilization, erosion control, and earth reinforcement is predicted from a proposed analytical method. The morphological analysis of many fabrics has been utilized to identify internal structure parameters responsible for their hydraulic prop…
Minimum temperatures for the initiation of smolder in cellulosic insulation materials were measured by the method of Bowes and Townshend (1-D heat flow through a layer on a hot surface). The minimum temperature decreases rather rapidly with layer thickness; a range of about 320°C to 220°C is indicated for layers from…
Some problems of the paracrystal model of diffraction from distorted lattices are discussed. The relationship between paracrystals and crystal growth-disorder models is established and the latter are used to generate examples of distorted lattices having many of the properties envisaged for paracrystals without some o…
Abstract A technical advance in the size reduction of cured scrap rubber has been achieved by a new process. The performance of products whose particle dimensions are 90% under 20 µm in diameter has been described in this study. When small panicle size rubber made by this process is used to extend high quality compoun…
Abstract The treatment of (TBA)TcO 4 with conc. HCl or HBr at room temperature yields (TBA)[TcOCl 4 ] or (TBA)[TcOBr 4 ], which are nearly insoluble in acidic aqueous solutions, but well soluble in organic solvents. The vibrational spectra indicate C 4v symmetry for the complex ions. (TBA)[TcOBr 4 ] shows an unusual r…
Abstract TiP 2 S 6 kristallisiert orthorhombisch in der Raumgruppe Fdd2 mit a = 10,842(4), b = 7,440(5), c = 21,535(6) Å und Z = 8. Ans 548 beobachteten symmetrieunabhängigen Reflexintensitäten, die auf einem automatischen Zweikreis‐Einkristalldiffraktometer gemessen wurden, konnte die Kristallstruktur mit Hilfe einer…
Collagen fibrils from the mesenteric connective sheath of the adult cockroach Periplaneta americana were extracted by enzymatic digestion with pepsin and were purified. Chromatographic studies and sodium dodecylsulfate electrophoresis revealed the presence of a single chain. It was demonstrated that the structure of t…
Abstract Durch Kondensation einer aus Disilicatanionen aufgebauten schlecht geordneten Calciumhydrogensilicatphase [1] unter der Mutterlauge bei 80°C und durch Hydrothermalreaktion vor Ca(OH) 2 mit SiO 2 · aq bei 150°C entsteht eine Calciumhydrogensilicatphase, die zu etwa gleichen Teilen (bezogen auf Si) aus Poly‐ un…
Phase relations in the system Y 2 O 3 ‐Y 2 O 3 ·WO 3 were studied at >1400°C. Yttrium oxide with the rare‐earth C‐type structure transformed into a hexagonal structure at 2360° and melted at 2400°C. The eutectic between Y 2 O 3 and 3Y 2 O 3 ·WO 3 was 2334°C at ∼90 mol% Y 2 O. 3Y 2 O 3 ·WO 3 with a rhombohedral stru…
Abstract The incorporation of sulfate into anodic film formed on aluminium in an H2SO4–MgSO4 solution was investigated by infrared spectroanalysis using the compensation method. The sulfate content of the film was very small at the initial stage of anodizing, but increased with time to a nearly constant value. This re…
Polarization-related electrostrictive coefficients Qh have been determined for relaxation dielectrics 0.856Sr TiO3-0.144 Bi2/3 TiO3 and (K3/4Bi1/4) (Zn1/6Nb5/6)O3, and for a simple non-polar perovskite BaZrO3 by measuring the hydrostatic pressure dependence of the dielectric permittivity. Anomalous variation in the el…
Age-hardening mechanisms of dental Ag-Pd-Cu-Au alloys were investigated by means of electron microscopic observations. Hardening was due to the precipitation of the L10 type CuPd-ordered platelet in the grain interior and to the discontinuous precipitation at the grain boundary. The characteristics of age-hardening cu…
Abstract Information on the dissolution of phosphate rock in soils as related to soil properties is needed in order to understand the solubility behavior of the phosphate rock in soils as related to crop response. This study was conducted to determine the relationships between the dissolution rate of North Carolina ph…
Abstract A detailed mathematical model of a single catalyst pellet has been developed to describe its behavior under transient conditions encountered during the warmup period of automobile exhaust catalytic converters. In contrast to the converter models previously reported in the literature, this model is capable of…
The environmentally-controlled crack propagation rates in the sensitized 304 stainless steel/water system at 95 C have been measured under static, monotonic; and cyclic stress conditions. It has been observed that the crack propagation rates increase with stress intensity rate and that the behavior under classical “st…
Abstract Two greenhouse experiments, the first a complete factorial comprising six rates of lime, four of phosphorus (P) and three of zinc (Zn) on two kaolinitic Ultisols, and the second involving factorial combinations of lime at four levels or gypsum at two chemically equivalent levels with three levels of P on one…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEXAFS study and magnetic properties of copper(II) chloranilato and bromanilato chains: a new example of orbital reversalM. Verdaguer, A. Michalowicz, J. J. Girerd, N. A. Berding, and O. KahnCite this: Inorg. Chem. 1980, 19, 11, 3271–3279Publication Date (Print):November 1, 1…
Abstract Model networks were prepared by selective crosslinking through vinyl groups occurring as either chain ends or as side‐groups on a poly(dimethylsiloxane) backbone. Iodometric titrations were used to determine the number of unreacted groups, thereby providing detailed information on the completeness of the reac…
Abstract When a polymer specimen yields under tension by the process of cold‐drawing, heat is generated in the necking region. This beating effect has been studied in polycarbonate, polyethylene, polypropylene, and PVC with the use of a thermovision system which produces a real time thermal image of the necking specim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhosphazene High Polymers with Steroidal Side GroupsH. R. Allcock and T. J. FullerCite this: Macromolecules 1980, 13, 6, 1338–1345Publication Date (Print):November 1, 1980Publication History Published online1 May 2002Published inissue 1 November 1980https://pubs.acs.org/doi/…