Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSol-Gel Derived TiO2 Microemulsion Gels and CoatingsDespina Papoutsi, Panagiotis Lianos, Panagiotis Yianoulis, and Petros KoutsoukosCite this: Langmuir 1994, 10, 6, 1684–1689Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue…
Extended Hückel molecular orbital (EHMO) calculations were performed on some substituted aliphatic amines and some substituted pyridine derivatives that are used as corrosion inhibitors in sour media. Correlations of corrosion rates with the charge on the nitrogen atom (Zn), energy of the highest occupied molecular or…
The deformation behavior of a single polymer chain subjected to an external force was studied by computer simulations. Both random walks and self-avoiding walks were investigated. The simulations were performed in two and three dimensions using the bond fluctuation model. The projection of the end-to-end vector in for…
A detailed investigation of the superplastic deformation of two grades of the Pb-62 Sn eutectic (where the compositions here and subsequently are in weight per cent) was conducted under identical experimental conditions of grain size (about 8 μm), temperature (390–420 K) and stress (0·1–10 MPa). The first grade (grade…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSlow Dielectric Relaxation of Entangled Linear cis-Polyisoprenes with Asymmetrically Inverted Dipoles. 2. Behavior in a Short MatrixHiroshi Watanabe, Osamu Urakawa, and Tadao KotakaCite this: Macromolecules 1994, 27, 13, 3525–3536Publication Date (Print):June 1, 1994Publicat…
Abstract Stainless‐steel artefacts are used as reference masses for the calibration of balances and instruments involving force. The surfaces of these masses react with the environment, leading to changes in the chemistry of the steel surface, accretion of surface contamination layers and a dynamic absorption of moist…
Boehmite sol prepared from aluminum nitrate has been spray‐dried to obtain micrometer‐size spherical particles consisting of submicrometer crystallites. The spray‐dried powder was further washed with solvents of varying polarities such as acetone, 2‐propano1, and 2‐methyl‐2‐propanol. Particle‐size distribution, morpho…
Through the coupling between the electrical capacitance of a spherical piezoceramic shell and the mechanical stiffness of a liquid contained therein, the frequency-dependent adiabatic bulk modulus ${\mathit{K}}_{\mathit{s}}$(\ensuremath{\omega}) of the liquid can be derived. Using this method, ${\mathit{K}}_{\mathit{s…
Photochemical excitation of (nBu4N)4W10O32 in the presence of cyclohexylamine leads to the monoelectronic reduction of the decatungstate (phi = 8 X 10(-2)) with the formation of cyclohexylamine radical species which can be detected by ESR spin-trapping investigations. Using this technique we could also reveal the pres…
The corrosion behavior of phosphatized zinc (Zn)-electroplated steel coated with epoxy films of different thicknesses was studied using electrochemical impedance spectroscopy (EIS), the breakpoint frequency method, potentiodynamic measurements, and the faradaic distortion method. The trends with time of the coatings’…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of the Enantioselective Dihydroxylation of Olefins by OsO4 in the Presence of Chiral BasesAchim Veldkamp and Gernot FrenkingCite this: J. Am. Chem. Soc. 1994, 116, 11, 4937–4946Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Publi…
This is the first of a set of articles on protein adsorption on low-temperature isotropic carbon (LTIC), a reputed blood compatible material. Surface-induced conformational changes of albumin, fibrinogen, and some small proteins were measured by differential scanning calorimetry (DSC) on LTIC powders and colloidal sil…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInclusion Complexes and Guest-Induced Color Changes of pH-Indicator-Modified .beta.-CyclodextrinsTetsuo Kuwabara, Asao Nakamura, Akihiko Ueno, and Fujio TodaCite this: J. Phys. Chem. 1994, 98, 25, 6297–6303Publication Date (Print):June 1, 1994Publication History Published on…
We report on dc-magnetization measurements on high-quality single crystals of the organic superconductors \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$ Cu(NCS${)}_{2}$ and \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$Cu[N(CN${)}_{2}$]Br for fields parallel and perpendicular to the conducting planes. For H perpendicular to the plane…
Amorphous carbon films prepared by filtered cathodic arc deposition have been studied by electron-energy-loss spectroscopy. It is shown nitrogen concentrations in the film of up to 30at.% can be controllably introduced. For nitrogen concentrations of up to 2–3 at.% the films are primarily sp3 bonded, whilst films with…
Abstract Poly(vinyl chloride) compounds offer a wide range of properties from elastomeric to rigid. For this reason they are well suited for many extrusion applications. However, many processors shy away from PVC because of its challenging process‐ability: PVC is shear sensitive, susceptible to thermal degradation, an…
We propose and study a method that self-consistently solves for the current and voltage distributions in random fuse network problems using lattice Green's functions. The method solves for the current distribution by only keeping track of the defect bonds and can treat networks with two extreme types of defects: insul…
Abstract The thermal properties of uniformly random poly(butylene adipate/isophthalate) copolyesters of various composition and different molecular weight were investigated by means of differential scanning calorimetry. All copolymers were partially crystalline, and the main effect of copolymerization was a lowering i…
Electrical conductivity is studied in two component composites, one of which is insulating polymer (nylon6, nylon66) in fibers coated with conducting polypyrrole and the other, polyethylene in spheres without coating. Conductivity is enhanced by more than 15 orders of magnitude when the concentration of polypyrrole-co…
Metal-insulator-semiconductor (MIS) structures of heavily doped ( 6–7×10 18 cm -3 ) epitaxial diamond were prepared, which include highly polarizable BaTiO 3 insulator films. They were characterized by capacitance-voltage ( C-V ) and electron-beam-induced-current (EBIC) measurements. Despite the presence of background…