Materials Literature
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Ab initio band structure calculations on some compounds with either hexagonal or triangular nets in their crystal structures are presented. The view taken is that electronic instabilities as manifested in certain visualisations of the electronic structures can be indicative of the presence of interesting ground states…
By means of conventional fabric-properties tests, the sweating-copper-mannequin test, and wearer trials, the wet comfort of polypropylene-fibre knitted fabrics is invested. We find that polypropylene-fibre fabric's wet comfort is strongly related to the fibre fineness, component fibre properties, and constructional fe…
Methyl linoleate was oxidized at 60, 90, 120 and , respectively, with sparging oxygen for different periods of time. On the basis of the peroxide values determined at four temperatures, four heating times were chosen for the analysis of physicochemical parameters, such as peroxide value, total oxidation products, poly…
No abstract provided
The principal mineral fillers used in thermoplastics and the reasons for using them are identified, together with those features that have to be controlled in order to achieve the optimum results and to avoid associated deleterious effects. General methods of filler production are outlined in the light of these requir…
This study systematically investigates the properties of extruded cement-based short polyvinyl alcohol (PFA) fiber reinforced plates with added metakaolin and silica fume. The enhancing effects of the two mineral admixtures on the mechanical properties of the plates are compared by the direct tensile test, freezing an…
: We have fabricated amorphous thin-film specimens containing light elements (B, C, N, O, F, and Mg) in addition to silicon, and have measured their composition using electron energy-loss spectroscopy (EELS). The films appear to be stable during storage in air and during irradiation by an electron beam, for doses belo…
Quasi-static and dynamic magnetomechanical measurements have been made on a twin-freeoriented single crystal of Tb/sub 0.27/Dy/sub 0.73/Fe/sub 2/ (Terfenol-D). Unusually large values of dynamic strain coefficient, d/sub 33/, and magnetomechanical coupling coefficient, k/sub 33/, of 19.1 nm A/sup -1/ and 0.83 respectiv…
A novel class of telechelic α-alkyl ω-trimethoxysilane poly(N-propionylethylene imine)s (TMS-PPEls) has been synthesized by living cationic ring-opening polymerization of 2-oxazolines. A new route for the termination reaction of the living polyoxazoline is described. These block copolymers have been tested as coatings…
A series of macrocyclic heterobimetallic complexes of type [M c (tntnam)M o ](PF 6 ) n and [M c '(tntnim)Ni](PF 6 ) n where M c = Co(III) and Zn(II), M c ' = Co(II), Co(III), and Zn(II), and M o = Ni(II), Cu(II), and Zn(II) have been synthesized and characterized. The macrocyclic ligands tntnim 2 and tntnam 3 contain…
The electrochemical behaviour of 254SMO stainless steel in phosphoric acid media, both with and without chloride ions, has been investigated and compared with that of 316L stainless steel and Hastelloy alloy C276. Open circuit potential measurements, potentiodyn amic polarisation curves, and SEM analyses were used in…
Control of the Dynamics of Photogenerated Carriers at the Boron‐Doped Diamond/Electrolyte Interface by Variation of the Surface Termination, Yagi, Ichizo, Tsunozaki, Kentaro, Tryk, Donald A., Fujishima, Akira
The onset and structure of compositional convection in a rotating system are investigated experimentally. A vertically oriented cylindrical annulus filled with NH 4 Cl‐H 2 O solution is cooled from the bottom and can be rotated about its axis at rates ranging up to 10.5 rad s −1 , corresponding to Ekman numbers down t…
We present explicit relations for the generalized dimensions of the spectral measure of the Thue-Morse symbolic sequence for positive integer values of q . Each is expressed through the eigenvalue of the corresponding matrix. It is also demonstrated how these dimensions can be recovered from the products of the values…
The replacement of fibroin heavy chain gene in silkworm by site directed homologous recombination was studied The DNA fragment consisting of an IE promoter driving green fluorescent protein (GFP) gene as reporter flanked by pieces of the 5' and 3' sequences of the fibroin heavy chain gene of silkworm at two sides was…
Polymer-clay nanocomposites are materials reinforced on a molecular scale by 1 nm-thick clay layers dispersed in a polymer matrix. Thermoset-clay nanocomposites were synthesised from unsaturated po ...
The Mooney-Rivlin equation was used to determine the degree of crosslinking of rubbers based on their stress-strain behaviour. Non-linear behaviour ofthe Mooney-Rivlin curve under valid elongation and changes in the crosslink density for swollen NR vulcanisates were observed, in contrast to unswollen vulcanisates. The…
Methyltrimethoxysilane (MTMOS) was used to prepare the SiO2 wood-inorganic composites. To enhance the properties of these composites, 2-heptadecafluorooctylethyltrimethoxysilane (HFOETMOS) as a property enhancer was added to this reaction system for SiO2 wood-inorganic composites. To elucidate the mechanism for enhanc…
Molecular dynamic simulations with quantum correction were performed on an alumina-magnesia system. First, interatomic potential parameters were determined empirically for alumina, magnesia and spinel so as to reproduce the lattice constants at 300K and higher temperatures. Then, the thermal expansivity, specific heat…
Dielectric, pyroelectric current and X-ray diffraction studies have been performed on a ceramic of composition Ba0.92Ca0.08(Ti0.75Zr0.25)O3 belonging to the BaTiO3–BaZrO3–CaTiO3 ternary diagram. A spontaneous classical ferroelectric–relaxor transition was evidenced at T = 210 K. Such behaviour has been reported previo…