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。
This paper reports continued studies of the tensile properties of twisted continuous-filament viscose rayon, Tenasco, acetate, nylon and Terylene yarns, with particular reference to the influence of twisting tension, the differences between ring-twisted and uptwisted yarns, values of the work of rupture and the yarn c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical Rotatory Dispersion Studies on Polysaccharides. II. Conformation of Partially Methylated Cellulose in Solution1Brock NeelyCite this: J. Am. Chem. Soc. 1960, 82, 16, 4354–4357Publication Date (Print):August 1, 1960Publication History Published online1 May 2002Publishe…
The variables affecting corrosion and mass transfer of steels by inhibited liquid Bi are discussed and explained in terms of the variables affecting formation of the ZrN or ZrC inhibiting films. Corrosion is acclerated by increasing the maximum temperature of operation, the temperature differential, and the Cr content…
Abstract Fünf Präparate verschiedener Zusammensetzung innerhalb der homogenen Phase TiO wurden durch Sintern von TiO 2 ‐ und Ti‐Mischungen bei 1400° hergestellt, bei 1000° homogenisiert und dann von dieser Temperatur abgeschreckt. Gitterkonstantenmessungen ergaben für das TiO stöchiometrischer Zusammensetzung den Wert…
The thermal conductivity of eight halide crystals has been measured over the temperature range 220°K to 390°K. The thermal conductivities of potassium bromide, potassium chloride, and sodium chloride vary inversely with temperature for the lower part of this temperature range, and are nearly independent of temperature…
ADVERTISEMENT RETURN TO ISSUEPREVArticleCommunications- Preparation and Chemistry of Tetracyanoethylene Anion RadicalO Webster, W Mahler, and R BEnsonCite this: J. Org. Chem. 1960, 25, 8, 1470Publication Date (Print):August 1, 1960Publication History Published online1 May 2002Published inissue 1 August 1960https://pub…
Measurements of viscosity and electric conductivity in liquid zinc chloride indicate that at temperatures near the melting point, the melt is associated. The degree of association diminishes rapidly with increasing temperature as shown by the decreasing energies of activation for both viscous flow and conduction. Liqu…
Evidence is given for the correlation between an optical absorption band at 2300 a.u. and an electron spin resonance system developed in quartz after 60 Co γ‐irradiation. The results of bleaching γ‐irradiated quartz and silica at 78°K. and at room temperature are presented and discussed. Also, further observations upo…
The radiation effects both of polydimethyl siloxane and dimetyl-diphenyl siloxane copolymers were studied by the use of gamma rays of cobalt-60 in order to estimate the protective effect due to phenyl radical against the radiation-induced cross-linking. The viscosity of irradiated sample increased with the absorbed do…
Abstract Solution studies of Kel‐F elastomer and Viton A with various amines have shown that dehydrohalogenation is the primary step in crosslinking and usually proceeds at temperatures lower than those required for gelation. There is a difference in the reactivity between the two polymers; dehydrohalogenation and gel…
The technique of the total reflection of x rays has been applied to the study of thin films of Cu, Ni, Ge, and Se vacuum-deposited onto polished glass substrates. Starting with fresh films, ``smooth'' enough to exhibit pronounced x-ray interference fringes in the region just beyond the critical angle, the effects of v…
A method has been devised for the measurement of crystallinity in drawn fibres of polyethylene terephthalate fibre by an X-ray technique. Strictly monochromatic X-ray radiation is used and the X-ray camera is evacuated. This enables the photographic film, which is used to record the X-ray reflexion, to be free of "whi…
The temperature dependence of Young's modulus of vitreous GeO2 has been determined by a dynamic resonance method from −195°C to 540°C. The modulus increases with increasing temperature from about −120°C to 400°C. Below and above this range the modulus decreases with increasing temperature. Young's modulus for vitreous…
Experimental results concerning electron ejection from annealed, atomically clean surfaces of germanium and silicon by the singly charged ions of the noble gases are reported. The (111) and (100) faces of silicon and the (111) face of germanium have been studied. Total yield and kinetic energy distribution of ejected…
Knudsen effusion and mass-spectrometric techniques were employed in studying the gaseous species in thermodynamic equilibrium with condensed boric oxide and water vapor in the temperature range from 1060° to 1450°K. Water vapor was introduced into a Knudsen cell containing B2O3, and the vapor effusing from the cell wa…
When glasses are colored by ionizing radiation the induced optical absorption increases as the radiation progresses and appears to be due to the superposition of a number of individual absorption bands. A detailed study of this process has been made using a specimen of Corning boro‐silicate glass colored by exposure t…
The manner in which underwater explosions differ from low-amplitude point sources of sound is considered theoretically, especially effects due to cavitation near the sea surface. Some measured differences between the acoustic source levels of various size charges and some absolute charge source levels are given. These…
Abstract A rapid method for determining the degree of crosslinking in elastomers is described which involves measuring equilibrium compression modulus at very small deformations on solvent‐swollen samples. The elastomer used was a polyether urethane vulcanized by an accelerated sulfur recipe. The degree of crosslinkin…
A simple theory concerning the reflection of electrons from solid targets is derived, based on the following assumptions: (1) the primary cause of electron reflection from a solid material is Rutherford scattering through angles greater than 90°; (2) the energy loss of electrons penetrating a solid target is given by…
The performance characteristics of a conventional thermoelectric generator operating under constant heat flux conditions have been computed. Expressions for power output, optimum efficiency, and optimum ratio of internal-to-load resistance show that optimization requires operating conditions appreciably different from…