Thermodynamics of the uranium-platinum metals systems
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Effect of orientational coupling due to nematic interaction on relaxation of Rouse chains
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of orientational coupling due to nematic interaction on relaxation of Rouse chainsHiroshi Watanabe, Tadao Kotaka, and Matthew TirrellCite this: Macromolecules 1991, 24, 1, 201–208Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Pub…
A Comparison of Linear and Non-linear Bending Models for Predicting Fabric Deformation in Automated Handling
The problem of simulating the laying of fabric on a table is studied in this paper. The non-linear bending properties of fabric are defined by interpolating the moment/curvature relationship measured with the Kawabata system. By using a linear and a non-linear bending model, deformed fabric shapes are predicted and co…
Effects of temperature on dezincification and electrochemical behaviour of 70—30 brass in sulphuric acid
This paper presents the results of experiments to investigate the effects of temperature on the dezincification and corrosion of 70–30 brass in 0·5 M H2SO4, Zinc and copper losses from specimens tested at various temperatures were estimated at various time intervals by atomic absorption spectroscopic analysis of the c…
Syntheses and properties of halato‐telechelic polyurethane‐ureas from divalent metal salts of p‐aminobenzoic acid, diamine, dialkylene glycols, and diisocyanate
Abstract Halato‐telechelic polyurethane‐ureas were synthesized from divalent metal salts of p ‐aminobenzoic acid, 4,4′‐diaminodiphenylmethane (4,4′‐methylenedianiline, MDA), dialkylene glycols, and 2,4‐toluylene diisocyanate (TDI). As the divalent metal, Mg and Ca were used, and diethylene glycol and dipropylene glyco…
Next Generation Titanium Alloys for Elevated Temperature Service.
There are many ongoing U.S. aerospace programs which have identified requirements for higher temperature capability from conventional titanium alloys. In order to meet these requirements, two new titanium alloys have been developed. A near alpha alloy, designated "Ti-1100" (Ti-6Al-2.7Sn-4Zr-0.4Mo-0.45Si), is a modific…
Preparation and characterization of [Mn 11 O 10 Cl 2 (OAc) 11 (bpy) 2 (MeCN) 2 (H 2 O) 2 ](ClO 4 ) 2 ·8MeCN, a mixed-valence manganese( III / IV ) aggregate with rare undecanuclearity (bpy = 2,2′-bipyridyl)
Treatment of [Mn4O2(OAc)7(bpy)2](ClO4)·3H2O (bpy = 2,2′-bipyridyl)1 with Me3SiCl in MeCN leads to a disproportionation and nuclearity change to give [Mn11O10Cl2(OAc)11(bpy)2(MeCN)2(H2O)2](ClO4)2·8MeCN 2; the crystal structure shows the core of this aggregate to comprise two [Mn4O3Cl]6+ cubane units ‘bridged’ by a near…
K39NMR study of the antiferroelectric phase transition in potassium thiocyanate
The $^{39}\mathrm{K}$ electric field gradient (EFG) and chemical-shift tensors have been determined in KSCN above and below ${\mathit{T}}_{\mathit{c}}$. Whereas all the data below ${\mathit{T}}_{\mathit{c}}$ are compatible with the site symmetry of the ${\mathrm{K}}^{+}$ ions given by the space group ${\mathit{D}}_{2\…
Charge deposition on an insulating spacer under impulse-voltage conditions
The paper describes a study of surface-charge deposition on insulating spacers under impulse-voltage conditions, using an electrode arrangement which allows scanning of the entire surface of the spacer with a capacitive probe. For a plain cylindrical spacer in SF6 at 1 bar, significant charge deposition was recorded f…
Strengthening of Ti-15V-3Cr-3Sn-3Al by Thermo-mechanical Treatments.
Mechanical properties of beta titanium alloys strongly depend on the precipitation behavior of alpha, which is controlled by thermo-mechanical treatments. To obtain high strength beta titanium alloys, uniform distribution of fine alpha precipitates is required, and various thermo-mechanical treatments have been develo…
27 Al nuclear magnetic resonance spectroscopy investigation of thermal transformation sequences of alumina hydrates. Part 2.—Boehmite, γ-AlOOH
High resolution 27Al magic-angle spinning nuclear magnetic resonance (MAS NMR)(78.15 MHz) spectra are reported for boehmite and pseudoboehmite and for calcines occurring in their thermal transformation sequences (involving γ, δ, θ and α-aluminas). Spectra for boehmite, pseudoboehmite and corundum (α-alumina) are fully…
Formation Behavior of Alloy Layer in Initial Stages of Galvanizing
The formation behavior of the alloy layer in the initial stages of galvanizing at 450°C has been investigated, using ultra low carbon Ti added steel sheet. The formation of Fe-Zn intermetallic compounds on the steel surface was retarded with the increase of Al content in galvanizing bath. For high Al content in the ba…
Optical study on domain switching of ferroelectric triglycine sulfuric acid and Rochelle salt
The domain switching of ferroelectric triglycine sulfuric acid and Rochelle salt was studied by observing optical gyration along the ferroelectric axes and measuring rotation of the indicatrices around the same axes. It was established experimentally that the antipolar domains of triglycine sulfuric acid were united b…
Simulation of small-angle X-ray scattering behaviour of activated carbon fibres adsorbing water
Small-angle X-ray scattering (SAXS) measurements have been carried out in order to investigate the size of micropores in activated carbon fibres (ACF) and the apparent change in size for different relative humidities. The scattering intensity at smaller angles and the gyration radius Rg increase at first with increasi…
Surface reaction of 2-mercaptobenzimidazole on metals and its application in adhesion promotion
Chemisorption of 2-mercaptobenzimidazole onto a chemically cleaned surface of metallic copper from its ethanol solution has been investigated by the use of surface-enhanced Raman scattering, X-ray-induced Auger spectroscopy and infrared spectroscopy. 2-Mercaptobenzimidazole reacts directly with metallic copper to form…
Detection of chirality by colour
On addition of optically-active ammonium ions the helical pitch of cholesteric liquid crystals containing steroidal crown ethers changes in an enantioselective manner: in certain cases the difference in the colour change can be visually detected.
Light-intensity dependence in the photochromism of dibenzo[2.2](4,4′)-azobenzenophane
Reduction of 4′,4″-dinitro-o-terphenyl under conditions of high dilution, produces a mixture of macrocyclic poly(azobenzene) compounds. From the mixture, three kinds of macrocycle, namely, dimer 2{dibenzo[2.2](4,4′)azobenzenophane}, trimer 3 and tetramer 4 have been isolated pure. In toluene, absorption peaks due to t…
Crystal structure of potassium phyllo-dithioindate(III), KInS2
Article Crystal structure of potassium phyllo-dithioindate(III), KInS2 was published on January 1, 1991 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 195, issue 3-4).
Phase transfer catalyzed polymerization of 4‐bromo‐2,6‐dimethylphenol in the presence of either 2,4,6‐trimethylphenol or 4‐tert‐butyl‐2,6‐dimethylphenol
Abstract The synthesis of poly(2,6‐dimethyl‐1,4‐phenylene oxide) with one 2,6‐dimethylphenol chain end (PPO–OH) and with well‐defined molecular weight by phase transfer catalyzed polymerization of 4‐bromo‐2,6‐dimethylphenol ( 20 ) in the presence of either 2,4,6‐trimethylphenol ( 1 ) or 4‐ t ‐butyl‐2,6‐dimethylphenol…
Benzene–ammonia coadsorption on TiO 2 (anatase)
The adsorption of benzene on clean and ammonia-covered titania samples has been studied by FTIR spectroscopy. Special attention has been paid to the stretching vibrations of surface hydroxy groups. The presence of coordinated ammonia does not affect the ν(OH) bands of free surface TiOH groups, although surface Ti—O st…