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。
Abstract Three series of segmented polyurethanes with different soft segment lengths and concentrations were examined by TMA, DMA, and mechanical methods. Maximum tensile strengths were obtained when ssc was 40–50%, which was explained by a specific interlocking morphology. No significant effect of soft-segment chain…
Permanent magnet compounds are basically ferromagnets with uniaxial anisotropy. In different cases, the magnets are elaborated by sintering of powders previously oriented and compressed under field. The value of the remanent induction Br is directly dependent on the degree of crystallites alignment, and we present in…
It must be first of all asked what rust really is. The question may seem to have an obvious answer. Anybody who has had anything at all to do with iron is acquainted with the effect of rust. Nevertheless, it has to be admitted that even a number of researchers who have dedicated themselves to the subject do not have s…
Clay subsoils were analysed by a procedure that uses a choline chloride reagent to distinguish double-layer exchangeable cations from other more strongly adsorbed forms extractable by an ammonium sulfate reagent. In those clay subsoils that contained little organic matter, the exchangeable cations made up nearly all o…
Action d'agents antimicrobiens dans des mousses de polyurethanne, polyester et PVC pour divers usages
Skinfold thickness was measured at five sites in 750 infants. The study population was unselected except that twin pregnancies and the infants of diabetic mothers were excluded, and very preterm infants were under represented. A pilot study had indicated that skinfold measurement was most reproducible at the thigh sit…
Abstract The pyrolysis of polymethyl acrylate is reported with identification of the major pyrolysis products. The mechanism involving random homolytic scission of the chain followed by a series of intermolecular and intramolecular transfer reactions as proposed by Cameron and Kane and extended by Haken, Ho, and Hough…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermomechanical behavior of modified asphaltsVikas M. Nadkarni, Arun V. Shenoy, and Johnson MathewCite this: Ind. Eng. Chem. Prod. Res. Dev. 1985, 24, 3, 478–484Publication Date (Print):September 1, 1985Publication History Published online1 May 2002Published inissue 1 Septe…
Conducting polymers with high electrical conductivity like doped polypyrrole are used successfully as radiation shielding meterials. They are especially effective to shield an electric field with an attenuation higher than 30 dB in the range of 3 MHz–300 MHz with doped polypyrrole of 35 µ thickness, bu not effective f…
Metoclopramide hydrochloride (MCPHCl.H2O) and metoclopramide base (MCP) have been studied by DSC, thermomicroscopy, X-ray diffraction and infrared spectroscopy. MCPHCl.H2O does not readily lose water of crystallization either from the solid state or from the melt, but depending on the conditions, dehydration can give…
Development of a rotational power loss measuring system based on the wattmeter method for a single Epstein strip and a brief discussion of magnetization processes of Si-Fe sheets under the rotational magnetizing condition are described. The pick-up coil system has a configuration with a flux search coil sandwiched by…
A ceramic electrolysis cell and a palladium diffuser have been developed in Japan and tested with tritium at the Tritium Systems Test Assembly (TSTA) at the Los Alamos National Laboratory, to test their feasibility as possible upgrades for the fuel cleanup system (FCU). The ceramic electrolysis cell, made of stabilize…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical properties of pyrromethene derivatives. Possible excited-state deactivation through proton tunnelingJ. A. Pardoen, J. Lugtenburg, and G. W. CantersCite this: J. Phys. Chem. 1985, 89, 20, 4272–4277Publication Date (Print):September 1, 1985Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic and structural properties of a reactive metalloporphyrin with N-oxide axial ligands. Crystal and molecular structure of bis(2,6-lutidine N-oxide)(tetraphenylporphinato)manganese(III) perchlorateCraig L. Hill and Michael W. WilliamsonCite this: Inorg. Chem. 1985, 2…
The parameters of gas-metal interaction solubility S, diffusivity D and permeability of protium and deuterium in stainless steel 316L have been determined in the temperature range from 600 to 900 K and in the pressure range from 102 to 105 Pa. The results can be presented by: where KS (Sieverts’ constant) is given in…
Basic characteristics of photomodulation spectroscopy are discussed. The method is applied to studying the band-tail states in a-Si:H and a-Ge:H, and the dangling-bond states in irradiated a-Si:H, trans-(CH)x, and chalcogenide glasses.
The new compounds Ca 3 GaAs 3 and Ca 3 InP 3 crystallize in the orthorhombic system, space group Pnma (No. 62) with the lattice constants Ca 3 GaAs 3 : a = 1217.1(5) pm, b = 419.7(2) pm, c = 1341.4(5) pm; Ca 3 InP 3 : a = 1201.9(5) pm, b = 413.8(2) pm, c = 1346.0(5) pm. In the structures distorted GaAs 4 - and InP 4 -…
Abstract The photoreactions of 2,4,6-triphenyl- (TPP), 2-t-butyl-4,6-diphenylpyrylium (2BDPP) and 2,4,6-triphenylthiopyrylium (TPTP) salts in tetrahydrofuran (THF) and/or 1,2-dimethoxyethane were investigated. Photoproducts were identified to be pyranyl radicals on the basis of photochemical behavior and ESR spectra.…
Abstract Graft copolymerization of maleic anhydride (MA) onto PVA was carried out both in the presence and absence of the initiator. In the former case, the resultant was a copolymer containing a carboxylic acid and a keto‐olefinic side chain. Therefore, the reaction product, viscosity, gel content, and mechanical pro…
Savannah River Laboratory is developing new technology to improve the safety, reliability, and flexibility of processing tritium at the Savannah River Plant. This technology, based on metal hydrides, will also decrease the equipment size. The LaNi5-xAlx series of alloys is used for tritium storage applications and pal…