Materials Literature
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Previously reported fibre/intumescent composite textile systems are leading to the development of a range of high performance thermal barrier fabrics. These systems comprise nonwoven cores of flame retardant cellulose/regenerated cellulose throughout which fibre-interactive intumescent chemicals (melamine and phosphat…
The adsorption of a cationic azobenzene derivative into both siliceous and aluminium containing mesoporous silica films has been investigated; photoisomerization was found to occur in the temperature range 80–300 K and the mesoporous aluminium containing silica films were proved to be useful reaction media to immobili…
Results from fracture toughness and tensile and delayed hydride cracking (DHC) tests on Zr-2.5Nb pressure tubes removed from CANDU power reactors in the 1970s and 80s for surveillance showed considerable scatter. At that time, the cause of the scatter was unknown and prediction of fracture toughness to the end of the…
Thermal analytical studies of synthesized mixtures of powdered wool, wool/flame retardant viscose blended fibre/intumescent combinations and intumescent-coated fabrics have shown previously that while enhanced volatilization occurs during char formation below 400 °C, the chars formed show higher-than-expected oxidativ…
The synthesis of a novel bent-shaped, four-ring thiophene-based chiral liquid crystalline ester derived from 5-(4-n-decyloxyphenyl)thiophene-2-carboxylic acid and (S)-1-methylheptyl 4′-hydroxybiphenyl-4-carboxylate is reported, i.e., (S)-4′-(1-methylheptyloxycarbonyl)biphenyl-4-yl 5-(4-n-decyloxyphenyl)thiophene-2-car…
Electrochemical techniques, complemented by weight change and ex situ X‐ray spectroscopic measurements, were employed to characterize the corrosion of nickel in concentrated solutions. By use of a rotating cylinder electrode, it was found that corrosion is a mass‐transport controlled process with the convective diffus…
For a diruthenium complex, charge migration between different moieties of a bridging ligand with extended conjugation is directly monitored for the first time by using time-resolved emission and absorption spectroscopy.
The synthesis of a new ligand, H3BBAC (N,N-bis(2-hydroxybenzyl)aminoacetic acid) and its first VIVO2+ complex, [Et3NH]2[OV(BBAC)]2 (1), are presented in order to model the active site of vanadium transferrins. Spectroscopic (EPR, UV-VIS), magnetic properties and crystal data of 1 are discussed and a new magneto-struct…
Hydrogen doped zinc oxide (ZnO:H) films have been deposited by radio‐frequency reactive magnetron sputtering and then heat treated at fixed temperature. The roles of hydrogen on transparent conducting properties as well as on microstructural evolution have been investigated. It is identified from X‐ray diffraction pat…
The synthesis and polymerization of two new electroactive bisphenols derived from 3,4,9,10-perylenetetracarboxylic dianhydride and 1,4,5,8-naphthalenetetracarboxylic dianhydride with 2-(4-aminophenyl)-2-(4-hydroxyphenyl)propane, respectively, are described. Copolymerization using the two new bisphenols and 4,4′-isopro…
Silver colored ribbon-like crystals of K1 − xSn5 − xBi11 + xSe22 (x ≈ 0.33) were prepared by direct combination of K2Se, Bi2Se3, Sn and Se at 800 °C. A structure determination was carried out for K0.66Sn4.82Bi11.18Se22. Bi2Te3-type and NaCl-type building units are connected to form a new kind of three-dimensional anio…
Reaction of VCl4 or VOCl3 with water under atmospheric pressure chemical vapour deposition conditions in a cold-wall horizontal-bed reactor at 350–600 °C produces clear yellow V2O5 films. Films grown at temperatures in excess of 500 °C were crystalline and indexed with an orthorhombic unit cell a = 11.527(5), b = 4.38…
A family of pyrochlore stannates, M2Sn2O7 (M = La, Bi, Gd or Y) has been prepared from hydrothermal systems at 240 °C and structurally characterized by powder X-ray diffraction, transmission electron microscopy and differential thermal analysis. The La and Bi stannates showed nanocrystalline characteristics with avera…
Treatment of zerovalent copper with NH4X (X = I, Br or SCN) in the presence of RbI and 18-crown-6 (18c6), in acetonitrile, in air, afforded a diversity of crystalline products in which halogeno- or pseudo-halogeno-cuprate(I) anions co-precipitate with the geometrically rigid crown ether cation [Rb(18c6)]+. Four comple…
Low-rate dynamic contact angles of a large number of liquids were measured on a poly(ethyl methacrylate) (PEMA) polymer using an automated axisymmetric drop shape analysis profile (ADSA-P). The results suggested that not all experimental contact angles can be used for the interpretation in terms of solid surface tensi…
The isomeric diamine monomer 5(6)-amino-1-(4-aminophenyl)-1,3,3-trimethylindane (DAPI) was successfully synthesized via the dimerization of α-methylstyrene followed by nitration and reduction. High molecular weight, soluble polyimides were synthesized via ester–acid solution imidization techniques and had glass-transi…
The presented studies are focused on the dependence of paper sheet strength properties such as tear resistance, burst, and extensibility on the composition of additive [chitosan blends with poly(vinyl alcohol) and gelated starch]. Chitosan acetate (cationic) and its blends caused an improvement of the strength propert…
Ten different ceramic matrix composite (CMC) materials were subjected to a constant load and temperature in an air environment. Tests conducted under these conditions are often referred to as stressed oxidation or creep rupture tests. The stressed oxidation tests were conducted at a temperature of 1454°C at stresses o…
The kinetics of waterside corrosion of Zircaloy-4 in PWR systems reveal accelerated reaction rates at high burnup levels. In such cases, a thick and dense hydride layer is observed beneath the metal/oxide interface. Laboratory corrosion tests on samples prehydrided using gaseous and cathodic charging techniques clearl…
Novel unsymmetrical squarylium dyes which absorb in the near-infrared region were synthesized by a stepwise procedure via intermediate 4-substituted 3-hydroxycyclobut-3-ene-1,2-diones. By introducing benz[c,d]indoline or benzo[b]pyran moieties at one end as an electron-donating component, the SQ dyes exhibited their a…