Materials Literature
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Great progress has been made in developing high-quality insulating materials, in maintaining consistent manufacturing processes, and in designing cable joints for easy installation. However, little attention has been given to the interfaces in cable joints. Greases are generally used as a lubricant for installation of…
Surface tracking on solid insulators is one of the most severe breakdown mechanisms associated with polymeric materials under long term service conditions. A wide range of relays can detect failure in a transmission line and prevent a total breakdown in the systems, but due to the non-healing characteristics of solid…
Electroabsorption has been measured with thin films of several (phthalocyaninato)galliums. It has been observed that the lowest energy absorption peak of most of the compounds studied is sensitive to the applied electric field. The shape of the electroabsorption spectrum is well reproduced by the second derivative of…
The performances of XLPE and EPR as candidate materials for insulation of high voltage power cables are investigated. Data obtained from laboratory tests performed on cable models aged under single thermal and electrical stresses, as well as under the combination of the two stresses, are considered. The drawing of ele…
In Ni-rich Ti–Ni alloys, three kinds of precipitates such as TiNi3, Ti2Ni3 and Ti3Ni4 appear with aging heat-treatments. The shape memory effect and superelasticity of the alloys are greatly affected by the presence of these precipitates. It is interesting to note that the Ti2Ni3 precipitate itself exhibits a phase tr…
In order to elucidate the mechanism of deformation and fracture of microcomponents, numerical simulations are conducted for a nanoscopic wire and film of nickel without lattice defects on the basis of a molecular dynamics using the EAM(embedded atom method) potential. A bulk of nickel is also treated by applying a per…
Hexagonally-packed mesoporous Nb-doped silica molecular sieves were hydrothermally synthesized with various siliceous sources and dopant concentration levels. The microstructure of mesoporous materials was characterized by a variety of physico-chemical methods. The pore packing order of the Nb-doped material depended…
In a roll-to-roll vacuum coater, homopolymer and copolymer biaxially oriented polypropylene films (BOPP HOMO and BOPP P/E COPO) were pretreated by a microwave-powered oxygen plasma. A plasma monitor and a Langmuir probe were used to analyze the plasma parameters, i.e. the composition of neutral and positive ions, and…
A new 18-membered hexaaza macrocyclic ligand with four pendant methylenephosphonates has been synthesized via the Mannich reaction. The protonation behaviour of this macrocycle has been followed by 31P and 1H NMR spectroscopy. The initial protonation pattern of the N-functionalised macrocycle is rather like its corres…
The feasibility of joining of 3‐D carbon—carbon (C–C) composites by using B and TiSi 2 interlayers has been investigated. The optimum temperature for joining with a B interlayer was determined to be about 1995°C and that for joining with a TiSi 2 interlayer was about 1490°C. The shear strengths of the joints made at t…
A new three-dimensional zinc fluorophosphate is prepared by using hydro(solvo)thermal conditions with ZnO, (HF) x ·py H 3 PO 4 and 4,4′-bipyridyl; the single-crystal structure is determined.
In atmospheric corrosion of copper, nickel, and iron, adsorption of water affects corrosion rates. Knowledge of water adsorption and metal oxyhydroxide formation is important in understanding the atmospheric corrosion process. The quartz-crystal microbalance (QCM) technique was used to measure mass changes of copper,…
Novel thermotropic, metallomesogenic polymers with a poly(ferrocenylsilane) main chain and 4-pentoxy-4′-hydroxyhexanoxyazobenzene or 4-pentoxy-4′-hydroxy-undecyloxyazobenzene acrylate side chains have been prepared; each material displays a nematic mesophase.
Abstract The mechanical properties and gas/water permeabilities of extrudates of low density polyethylene (LDPE), wheat starch and ethylene acrylic acid (EAA) or polycaprolactone (PCL) were studied after their conditioning at various relative humidities. Satisfactory agreement was found between the experimental values…
The results of a structural analysis by x-ray diffraction on fiber samples of the nematic mesophase with cybotactic groups of poly(urethane-ester) TDI-${\mathrm{C}}_{2}$ ${\mathrm{C}}_{6}$ , TDI-${\mathrm{C}}_{6}$ ${\mathrm{C}}_{4}$ , TDI-${\mathrm{C}}_{6}$ ${\mathrm{C}}_{6}$ , TDI-${\mathrm{C}}_{6}$ ${\mathrm{C}}_{8}…
Ab initio calculations, including the electron correlation effects via the Møller–Plesset partitioning, of the static longitudinal polarizability (αL), first and second hyperpolarizabilities (βL and γL) of small push-pull molecules have been carried out with the 6-31G and 6-31G* basis sets. Two types of conjugated seg…
Heteroatomic cages (BN/2NN/2) with borons and nitrogens fully replacing alternant sets of carbons in cages are built graph-theoretically and investigated via the semiempirical MNDO Hamiltonian. The comparison with their parent carbon cages CN is made in terms both of electronic and of geometric changes. Infinite class…
The total rate constant for the NH 2 + NO reaction has been measured in the temperature range 305−1037 K using a laser photolysis mass spectrometric technique by probing the rates of H 2 O formation and NO decay. A weighted least-squares analysis of our data gives the following total rate constant expression: k t = 8.…
Samples Lan+1NinO3n+1–δ(n=2,3) have been prepared by two different methods, which lead to different oxygen stoichiometry values. Materials obtained by the citrate route always show higher content of Ni3+ , which can be rationalized by the high reactivity and the original morphology of the precursors obtained by this m…
In Volume 1 Preface Introduction Description of Pharmacological Classifications, I.K.M. Morton A to M In Volume 2 N to Z In Volume 3 Name Index Molecular Formula Index Chemical Abstracts Service Registry Number Index Type of Compound Index