Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
In this article, the syntheses and thermal properties of several alkyne- and phosphorus-containing materials are discussed. The materials were synthesized using substituted phenolic molecules which were added to phosphorus oxychloride. The materials synthesized include phosphine oxides, phosphates, diphosphates, and o…
Article Biodegradable Composite Materials Based on Polyethylene and Natural Polymers. I. Mechanical and Thermal Properties was published on August 1, 1999 in the journal Journal of Polymer Engineering (volume 19, issue 5).
In the present work, some thermoluminescent properties of chemically vapour deposited (CVD) polycrystalline diamond films are investigated. After radiation, two TL peaks at least located at 350 and 540 K are observed. After depletion of the low temperature peaks, the 540 K TL peak is isolated and then analysed by diff…
A model is developed for determining the stress and strain fields of an array of slip dislocation defects in a two-dimensional elastic medium with a highly nonlinear and nonlocal energy functional. The medium serves as a model for an elastic system in the vicinity of a martensitic structural phase transformation, in t…
Abstract The synthesis of polymer monolayers, which are designed to act as “cushions” for lipid membranes attached to solid surfaces, is described. Monolayers of poly(ethyloxazolines) which could act as a polymeric support for biomimetic membranes have been attached to silicon oxide or gold surfaces following differen…
Parametric analyses of the strain-stress in the drying process are performed to study the influence of the intermittent drying on the behaviors of drying-induced strain-stress and deformation as well as the drying characteristic. The transient three-dimensional problem of strain-stress and heat and moisture transfer i…
4-Chloro-1,3-phenylene bis[4-(4-n-alkylphenyliminomethyl)benzoates] have been synthesized and the mesophases were investigated by optical microscopy, X-ray diffraction measurements and electrooptical methods. Some derivatives exhibit the electrooptically switchable mesophase B2 between 75–125°C, which can be supercool…
Abstract Fresh and weathered pyrochlore from the Lueshe carbonatite complex (in the northeast of the Democratic Republic of Congo) was studied by Fourier transfom infrared (FTIR) spectroscopy and by a combination of FTIR spectroscopy and thermal analysis. The former was carried out in the spectral range 400–4000 cm −1…
A new 13% Cr martensitic stainless steel (0.025% C-13% Cr-Ni-Mo) with excellent resistance to carbon dioxide (CO2) corrosion and good resistance to sulfide stress cracking (SSC) was developed, and its application limits in oil and gas environments were clarified. The CO2 corrosion rate of the 13% Cr steels with Ni and…
Amylose-iodine (AI) complex has been synthesized in aqueous solution without added KI. Complex formation (with solid iodine in amylose solution) is maximized at approximately 35°C and decreases beyond that temperature. Ion-selective electrode (ISE) measurements of an aqueous solution of iodine and AI complex indicate…
The paraelectric and the ferroelectric/ferroelastic structures of Pb(2)KNb(5)O(15) have been refined by the Rietveld method from neutron and X-ray powder diffraction data. The paraelectric phase is tetragonal (space group P4/mbm) with lattice parameters a(t) = 12.646 (1) and c(t) = 3.9551 (2) Å at 790 K. The Pb- and K…
New experimental evidence has been obtained confirming the significance of deep traps for thermal quenching of luminescence and establishing the main features of thermoluminescence (TL) of the dosimetric peak in a-Al2O3 crystals. The TL yield relative to the heating rate and temperature dependence of the mean activati…
A novel bismaleimide (BMI), bis(4-maleimidophenoxy-3,5-dimethylphenyl)naphthylmethane, containing a pendant naphthalene and aryl ether linkage, was synthesized from bis(4-hydroxy-3,5-dimethylphenyl)naphthylmethane through multistep reactions. The BMI was characterized by Fourier transform infrared spectroscopy, elemen…
Abstract Several useful composite materials have been developed with natural fiber and plastic matrices, and their commercial viability has been established in terms of adding value to abundant and cheap natural resources. The Macromolecular Research Centre, Jabalpur, India, has recently developed composite from waste…
A series of oligomeric and first generation dendritic materials based on silane-siloxane and silsesquioxane core has been synthesised. The attachment of cyano-biphenyl mesogens separated by spacers to these cores which were varied systematically, resulted in liquid-crystalline materials. The synthesis of the materials…
The phase equilibria between β and α titanium, Ti3 Al (α2 ), and Ti5 Si3 have been investigated in the temperature range 700–1200°C, for binary and ternary titanium alloys containing 14–22 at.-% aluminium and 1–3·5 at.-% silicon. These results have been used to construct sections of the ternary phase diagram. Silicon…
BACKGROUND: The presence of malignant breast cancer cells in bone marrow or peripheral blood is a prognostic factor. We tested the capacity of a novel magnetic cell analyzer to detect rare cancer cells in mixtures with human peripheral leukocytes. METHODS: Human peripheral leukocytes were spiked with cells of the MCF-…
We report the polarized infrared and optical reflectance of ${\ensuremath{\beta}}^{\ensuremath{''}}\ensuremath{-}(\mathrm{ET}{)}_{2}{\mathrm{SF}}_{5}{\mathrm{CH}}_{2}{\mathrm{CF}}_{2}{\mathrm{SO}}_{3}$ as a function of temperature. This fully organic superconductor displays weakly metallic behavior over the entire tem…
Results on the dynamics of silica are presented: vibrations and relaxations. Using molecular dynamics, glass structures are generated by rapidly quenching melts below the glass transition. For the local minima of the structures the vibrational density of states is determined, the structures of the eigenmodes are analy…
The formalism developed in molecular theory for calculation of local electronic-structure characteristics in a nonorthogonal atomic basis is generalized to systems with translational symmetry. Expressions have been derived to describe the bond orders, covalency, and valence in a crystal for restricted and unrestricted…