Materials Literature
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The encapsulation of liquid crystals in a polymer matrix produces a material with interesting and potentially useful optical properties. The earliest efforts generated a dispersed phase whose dimensions were comparable to optical wavelengths and therefore afforded materials which were highly scattering. These material…
An investigation of the metallurgy of a pseudobinary section of the ternary-phase diagram has been performed by means of differential thermal analysis, x-ray diffraction, and metallography. Microstructural observations and lattice parameter variations have been interpreted in terms of the existence of a solid solubili…
Abstract A commercial polycarbonate (PC)/acrylonitrile‐butadiene‐styrene (ABS) blend was reprocessed by injection molding to study the influence of reprocessing on the physical properties of the product. The modulus of elasticity and the yield stress are unaffected by reprocessing, whereas the break properties and the…
The possible relationship between skin capacitance and the mechanical properties of the skin was studied using non-invasive techniques. Skin hydration was changed by soaking skin with tap water. Hydration of the skin increased the capacitance significantly (p less than 0.01) and hysteresis (creeping phenomenon) (p les…
Abstract Morphology and properties of polymer alloys can be controlled by thermody‐namlcally reversible (structure freeze‐in) or irreversible (structure lock‐in) processes by simultaneously manipulating miscibility, mechanisms of phase separation, glass transition temperature (structural relaxation), and cure kinetics…
Fibrobacter succinogenes subsp. succinogenes S85 initiated growth on microcrystalline cellulose without a lag whether inoculated from a glucose, cellobiose, or cellulose culture. During growth on cellulose, there was no accumulation of soluble carbohydrate. When the growth medium contained either glucose or cellobiose…
Electrodeposition of various engineering metals on a platinum electrode with and without an electrosynthesized polypyrrole film was studied by cyclic voltammetry. Copper, nickel, lead, tin, and silver were readily deposited. The presence of a polypyrrole film generally reduces the plating rate and shifts the depositio…
Oxidation kinetics of diamond films synthesized by plasma-assisted chemical vapor deposition (CVD) in flowing oxygen were evaluated using thermal gravimetric analysis. The oxidation rates of diamond films, measured in the 500 to 750 °C range, were significantly lower than natural diamond, which was lower than grafoil…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCross-coupling versus homocoupling in the reactions of dimethyl(N,N,N',N'-tetramethylethanediamine)palladium with organic halidesWim De Graaf, Jaap Boersma, and Gerard Van KotenCite this: Organometallics 1990, 9, 5, 1479–1484Publication Date (Print):May 1, 1990Publication Hi…
The plasma–material interaction and high heat flux properties of beryllium are reviewed to determine its suitability as a plasma‐facing component in magnetic fusion energy reactors. Consideration is given to beryllium’s outgassing, erosion, and hydrogen retention characteristics. Its responses to normal and off‐normal…
Abstract Polyacetal (POM) toughening with thermoplastic polyurethane (TPU) elastomer was investigated in terms of Theological, mechanical, and morphological properties. Polyacetal can be effectively toughened by the blending with TPU elastomer and the improvement on toughness is found most significant with TPU content…
Abstract The crystallization behavior of two ethylene/octene copolymers, which differ in hexyl branch concentration, and their fractions were assessed. Fractionation of the crystalline linear low density polyethylenes (LLDPEs) was achieved by temperature rising elution fractionation. As the column temperature was rais…
The transepithelial absorption of food-type proteins has been shown to proceed by endocytosis along two functional pathways: a minor direct pathway allowing transport of intact protein and a major lysosomal degradative pathway. The human colon carcinoma cell line CaCo-2 grown on Millipore filters was used here further…
A compound of formula CuCI2(NITpPy),, where NITpPy = 2-(4-pyridyl)-4,4,5,5-tetramethylimidazolinyIl--o xy1 3-oxide, was synthesized. It crystallizes in the triclinic Pi space group with a = 7.301 ( I ) A, b = 12.693 (2) A, c = 14.984 (2) A, a! = 79.79 (I)', 0 = 86.67 (I)', y = 83.92 (I)', and Z = 2. The structure cons…
Tritium handling equipment and methods at the Savannah River Site Tritium Facilities have been continually improved since tritium processing operations began in 1955. Several new technologies were introduced into the Tritium Facilities in the 1980’s. One of these is the use of fluidless, mechanical pumps (Normetex and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry and redox chemistry of aquaferrotungstosilicate, H2OFeIIISiW11O395- in the presence of hydrogen peroxide and hydroxylJames E. Toth, Jon D. Melton, Diane Cabelli, Benon H. J. Bielski, and Fred C. AnsonCite this: Inorg. Chem. 1990, 29, 10, 1952–1957Publication…
In a recent paper McGreevy and Pusztai [1] have described an interesting simulation technique for determining the structure of disordered systems (liquids and glasses) that uses as input the experimentally measured radial distribution function g E(r 12), or equivalently, the structure factor a E(k). The essence of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPerchlorinated phthalocyanines: spectroscopic properties and surface electrochemistryM. Neal Golovin, Penny Seymour, Karupiah Jayaraj, Yan Song Fu, and A. B. P. LeverCite this: Inorg. Chem. 1990, 29, 9, 1719–1727Publication Date (Print):May 1, 1990Publication History Publish…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and magnetic and spectroscopic properties of a nickelIIcopperIInickelII trinuclear speciesJuan Ribas, Carmen Diaz, Ramon Costa, Yves Journaux, Corine Mathoniere, Olivier Kahn, and Alain GleizesCite this: Inorg. Chem. 1990, 29, 11, 2042–2047Publication Date (Print):…
Abstract A constitutive theory, which consists of the constitutive equation and the transformation kinetics, is proposed to describe the thermomechanical behaviors of the shape memory alloys. Simulation in Ti-Ni alloy proves a good applicability of the theory when the overall characteristics of the stress-strain-tempe…