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Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Jon Geist, Gerhart J. Kneissl, and V. R. Weidner, "High Purity Powdered CsI as a High Reflectance Infrared Diffuser," Appl. Opt. 6, 1280-1281 (1967) Ex…
Potentiostatic anodic polarisation measurements on brasses (100–60 wt.-% Cu) in 0 ·150 N-NaOH are described and compared with those of the pure components. The inapplicability of current theories on anodic dissolution of homogeneous binary systems is discussed, and a possible mechanism for anodic dissolution is sugges…
Pelletized samples of ZnSO4 and ZnO·2ZnSO4 were decomposed in a stream of N on a recording thermogravimetric balance. Both decomposition reactions are typically topochemical and they follow linear kinetics. The effect of partial pressures of SO3 on the rate of decomposition of ZnO—2ZnSO4suggests that SO3 is strongly a…
Polyester elastomers were prepared by block copolymerization of dimethyl terephthalate (DMT), butanediol (BDO), and polytetramethylene glycol (PTMG). Polyester from DMT and butanediol forms a high-melting hard segment in block copolyester to prevent undue chain slippage when fibers are stretched. High elongation was p…
Temperature dependence of non-ohmic conduction related to acoustoelectric phenomena in tellurium is presented. In the extrinsic region, the threshold field for departure from ohmic law increases as the mobility of holes decreases with raising temperature. In the intrinsic region, however, two types of non-ohmic behavi…
Abstract The effect of volatilization of molecules larger than monomer has been introduced into the solution of the Simha, Wall, and Blatz kinetic equations for the degradation of a high polymer with an initial “most probable” distribution. Equations describing the rate of sample weight and average molecular weight ch…
Abstract Die Darstellung kristalliner Wolframate MeWO 4 (Me = Ba, Ca, Cd, Co, Mg, Mn, Ni, Pb, Sr, Zn) durch Umkristallisieren oder chemische Reaktionen in Schmelzlösungen wird beschrieben. Es werden Angaben zum Bildungsmechanismus, zur Löslichkeit und einigen weiteren Eigenschaften der Wolframate gemacht.
Abstract The rate of homopolymerization of maleimide has been measured in dimethylformamide solution at 60°C. in the presence of azobisisobutyronitrile; it has been compared to that of N‐n ‐butylmaleimide. The overall rates of polymerization are equal to R p = k [M] 1.1–1.2 [In] 0.8 for maleimide, and R p = k '[M] [In…
The general features of heat exchange phenomena are reviewed, and their influence upon corrosion processesin liquids is outlined. The experimental techniques previously used by others are surveyed and new ones based upon an analysis of the problem are suggested. The presentation of data obtained by these methods is il…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe formation of and interrelation between some peroxo binuclear cobalt complexes. IMasayasu. Mori and John A. WeilCite this: J. Am. Chem. Soc. 1967, 89, 15, 3732–3744Publication Date (Print):July 1, 1967Publication History Published online1 May 2002Published inissue 1 July…
Abstract Polyethylene has been grafted with maleic anhydride, as proved by the infrared spectra and the properties of the grafted films. The influence of oxygen and a comparison of the effectiveness of benzoyl peroxide and AIBN showed that polyethylene macroradicals are formed through the decomposition of hydroperoxid…
The influence of sulfur in the range 80 to 1700 ppm on the corrosion resistance of a 14 wt % Cr-14 wt % Ni-balance Fe alloy has been determined in various media. In general, high purity alloys containing sulfur are shown to have excellent general corrosion resistance to oxidizing and nonoxidizing acids when compared w…
Abstract Soil clays containing pedogenically chloritized 2:1 layer silicates, after brief contact at 25C with 2% Na 2 CO 3 (pH 11), developed a proportionately large increment of CEC which was retained after thorough washing with neutral salts (KCl, NaCl) to reduce the pH value below 7. A soil clay from Natal, S. Afri…
The heat-transport properties and heat capacity of UC, UP, and US were determined between room temperature and 600°C. These properties were measured by a transient technique with a laser as a heat pulse source. The thermal conductivity was calculated from the product of the thermal diffusivity, heat capacity, and dens…
Abstract Nuclear magnetic resonance, infrared, and ultraviolet spectroscopy were used to elucidate the structure of oxidized polystyrene. To identify the nuclear magnetic resonance peaks of the degraded polystyrene, deuterated polystyrenes were synthesized and degraded. The primary structure present in the degraded po…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEstimation of preexponential factor from thermal decomposition curve of an unweighed sampleRaymond N. Rogers and Louis Charles. SmithCite this: Anal. Chem. 1967, 39, 8, 1024–1025Publication Date (Print):July 1, 1967Publication History Published online1 May 2002Published inis…
Experimentally determined heat capacity valu es, precise to within 0.1 percent, and related thermal data are reported for quenched and annealed diethyl phthalate glasses from ]0 oK to the glass transformation te mperature, Tg (around 180 O K) , for the liquid from T" to 360 oK, and for the crystal from 10 oK to the me…
A technique for the examination of the dynamic-tensile-strength characteristics of materials is presented. The dependence of tensile strength upon stress gradient, hence stress rate, is demonstrated for Al, Cu, Ni, and Pb. The results were tested and found to be self-consistent in that once the dynamic-tensile-strengt…
Transparent glass‐ceramics, in which the major phase was NaNbO 3 , were obtained by heat treatment of glasses in the Na 2 O‐Nb 2 O 5 ‐SiO 2 system. The structure of the glass and the changes occurring during crystallization as a function of temperature and heating rate were examined by X‐ray diffraction, transmission…
The climb kinetics of dislocation loops in thin foils in terms of either the emission of vacancies from the loop or the diffusion of vacancies to the surface has been critically examined. Although both mechanisms give similar rate equations, predictions can be made which allow the rate controlling process to be determ…