Materials Literature
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Single-crystal foils of the compound Bi2Te3 were irradiated with 7.5-MeV protons at two levels of flux to the same integrated dose of 5.5×1018 protons/cm2. The specimens were examined by transmission electron microscopy. After irradiation with a flux of 1.8×1013 protons/cm2·sec, clusters of point defects ranging in si…
X-ray powder diffraction data are reported for 15 normal long-chain esters. The compounds represent all combinations of acid and alcohol where the acid portion is n-tetradecanoic, n-hexadecanoic, or n-octadecanoic acid, and the alcohol portion is n-tetradecanol, n-pentadecanol, n-hexadecanol, n-heptadecanol, or n-octa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of decomposition of chloroformic acid by rapid-scan infrared spectroscopyReed J. Jensen and George C. PimentelCite this: J. Phys. Chem. 1967, 71, 6, 1803–1808Publication Date (Print):May 1, 1967Publication History Published online1 May 2002Published inissue 1 May 19…
The thermal expansion of a number of cubic refractory compounds of thorium was measured by high‐temperature X‐ray diffraction. The coefficients of thermal expansion range from 7.5 to 8.2 × 10 −6 /°C for ThN, ThC 0.84 , ThP 0.71 , ThP 0.61 , and Th 3 P 4 between 900° and 1300°, 1450°, 1750°, 1750°, and 1150°, respectiv…
Abstract Polymerization of chloro‐ and fluorobenzene by aluminum chloride‐cupric chloride produced highly colored oligomers. Chlorobenzene reacted under the standard conditions, i.e., 6/1/0.5 (molar ratio) of aromatic/catalyst/oxidant at 60°C. for 1 hr., to give a red solid in 14% yield. Evidence concerning the struct…
The permeabilities of several types of plastic films to water and to carbon dioxide were measured. No material was found to have a carbon dioxide permeability as great as its water permeability.
Abstract Copolymerization of vinyl and divinyl monomer is a typical method for preparing a network polymer. A multiple network structure, in which one network entangles with another, is supposed to be produced when a network polymer is swollen in the monomer mixture and then polymerization of absorbed monomer is carri…
It is emphasized, that the loss of long range order does not necessarily destroy three-dimensional lattices. Nematic or smectic mesophases as well as special types of liquid crystals, many crystalline or amorphous high polymers, crystals near the melting point, molten substances and mixed crystals are examples in natu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence of iridium(II) chelates with 2,2'-bipyridine and with 1,10-phenanthrolineKenneth R. Wunschel and William E. OhnesorgeCite this: J. Am. Chem. Soc. 1967, 89, 11, 2777–2778Publication Date (Print):May 1, 1967Publication History Published online1 May 2002Published i…
By twisting copper single crystals to introduce known densities of forest dislocations, the tension yield stress has been related to the forest density in the form: where τ00 ≃ 5g/mm2 and α0 ≃ 0·65. The “small value of τ00 suggests that the yield stress is determined mainly by the forest dislocation density.
Abstract Castor oil has been used to prepare millable elastomers by using 2,4‐toluene diisocyanate, 4,4′‐diphenylmethane diisocyanate, and 1,5‐naphthalene diisocyanate, respectively. These elastomers are vulcanized with sulfur and 4,4′‐diphenylmethane diisocyanate separately by using the standard methods of rubber tec…
The merits of a multi-layer sandwich technique for explosive shock loading of metal foils are discussed with special reference to electron transmission studies of microstructure. The conditions are given for the design of the explosive test assembly such that the foil specimens are subjected to a plane compression wav…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltrahigh pressure-high temperature synthesis of rhombohedral dichalcogenides of molybdenum and tungstenMeyer S. SilvermanCite this: Inorg. Chem. 1967, 6, 5, 1063–1064Publication Date (Print):May 1, 1967Publication History Published online1 May 2002Published inissue 1 May 19…
Abstract Effects of a naphthenic oil and of HAF carbon black on SBR processability were evaluated. Three rheological parameters related to processability are apparent viscosity, extrudate swell and extrudate surface roughness; they were studied with a capillary rheometer over a shear rate range of 10 to 3000 sec −1 .…
Abstract Microheterogeneity has been observed in several elastomer blends on thin frozen sections, microtomed in a nitrogen atmosphere to eliminate all surface oxidation and cracking, in both phase and electron microscopes. Phase photomicrographs and electron micrographs showing identical detail were obtained on secti…
Magnetization measurements along the a -and c -axes of a single crystal of a compound Fe 7 Se 8 have been carried out in magnetic fields up to 92 kOe over the temperature range 4.2° to 300°K, together with magnetic torque measurements on the b c -plane up to 9 kOe. The results of magnetization measurements along the c…
The amplitude of the first-order diffracted wave is computed as a function of the thickness and the variation of dielectric constant of a dielectric grating, if the light is incident at the Bragg angle. It is shown that it is possible to diffract 100% of the incident radiation if the thickness and variation of dielect…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies on the reaction between peroxydisulfate ions and aromatic amines. Boyland-Sims oxidationEdward J. BehrmanCite this: J. Am. Chem. Soc. 1967, 89, 10, 2424–2428Publication Date (Print):May 1, 1967Publication History Published online1 May 2002Published inissue 1 May 1967…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of carbon monoxide at atmospheric pressure with trialkylboranes. Synthesis of trialkylcarbinols via hydroborationHerbert Charles. Brown and Michael W. RathkeCite this: J. Am. Chem. Soc. 1967, 89, 11, 2737–2738Publication Date (Print):May 1, 1967Publication History P…
Computer calculations of the fraction of gel as a function of radiation dose have enabled tables to be constructed of the relation between gel fraction and number of crosslinks for various initial weight to number average molecular weight ratios and for a number of different ratios of chain scissions to crosslinks. Th…