Materials Literature
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Two independent, three-dimensional sets of intensity data have been collected from two different crystals of basic beryllium acetate (Be40(CH3COg)8 , cubic, /~d3, a 0 = 15.74 A, Z = 8). An Eulerian cradle Geiger counter spectrometer was employed for the measurements. Two crystals were surveyed so as to insure against…
The magnetic susceptibilities of six spin-free tetrahalo complexes of bivalent cobalt, CoX4—2 (X=Cl—, Br—, I—), have been investigated over a temperature range and found to exhibit satisfactory dependence on the Curie-Weiss law. The magnetic moments were found to be in the order predicted by crystal field theory, viz.…
Abstract Es werden die Ultrarotspektren der Verbindungen H 6 TeO 6 , (H 2 TeO 4 ) x , Na 2 H 4 TeO 6 , K 2 H 4 TeO 6 · 3 H 2 O, Na[Sb(OH) 6 ], KSbO 3 · 2,2 H 2 O, Na 2 HSb 3 O 9 · 4 H 2 O, K 2 HSb 3 O 9 · 5 H 2 O, NaSbO 3 und KSbO 3 im Bereich 400–4000 cm −1 angegeben und ausgedeutet. Die Konstitution dieser Verbindun…
Abstract The rate of reaction of ceric nitrate with the 1,2‐glycol units and the alcohol units of polyvinyl alcohol was determined at 20°C. It was found that the glycol units are oxidized much faster than the alcohol units even though they are outnumbered about one hundred to one in the polymer chain. Under the condit…
Techniques have been developed to extend the measured electric field dependence of the sidewise 180\ifmmode^\circ\else\textdegree\fi{} domain-wall velocity in liquid-electroded BaTi${\mathrm{O}}_{3}$ crystals. The wall velocity data now cover about eight decades of velocity. The wall velocity is given by ${v}_{\ensure…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEsterification.M. L. Peterson and J. W. WayCite this: Ind. Eng. Chem. 1959, 51, 9, 1081–1085Publication Date (Print):September 1, 1959Publication History Published online1 May 2002Published inissue 1 September 1959https://pubs.acs.org/doi/10.1021/ie51397a007https://doi.org/1…
Other| September 01, 1959 Propagation of Peak Strain and Strain Energy From Explosion-Generated Strain Pulses in Rock1 David Fogelson; David Fogelson Search for other works by this author on: GSW Google Scholar Thomas C. Atchison; Thomas C. Atchison Search for other works by this author on: GSW Google Scholar Wilbur I…
Differential spectra have been obtained of a number of irradiated polyamides and monomeric amides. These spectra indicate that both free radical and molecular products are produced as primary products. The transient colored products (which are believed to be free radicals) and molecular products appear to be in the am…
Diisocyanates condense readily with hydrazine or hydrazine hydrate to give polyureylenes with the structure: Similarly, dihydrazides (NH2NHCOR′CONHNH2) condense with diisocyanates to give polymers with the structure: Tough films and fibers can be prepared from these polymers by conventional techniques. Solutions of s…
Article Zum Aufbau der Systeme Kobalt-Gallium, Palladium-Gallium, Palladium-Zinn und verwandter Legierungen was published on September 1, 1959 in the journal International Journal of Materials Research (volume 50, issue 9).
The decomposition of sodium dithionite has been investigated in alkaline aqueous solution. Under these conditions it decomposes by a first order reaction with a rate constant of 4.5 × 10 −4 min −1 at 88.5 °C and an activation energy of 26.5 kcal/g-molecule. The ionic strength, and the concentration of the sodium hydro…
Abstract Uncertainty as to the nature of the crosslinks in vulcanized rubber has been a tremendous handicap to chemical studies of vulcanization. A direct result is that physical methods have been the most successful in providing definite information about the nature of vulcanized rubber. However, these physical metho…
The spin-spin interaction via phonon exchange is proposed as a new mechanism of the so-called exchange interaction between the electron spins of the paramagnetic ions in crystal which has been overlooked hitherto. The interaction Hamiltonian derived by Van Vleck to account for the spin-lattice relaxation phenomenon is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCopper Phthalocyanine Polymers1William C. Drinkard and John C. Bailar Jr.Cite this: J. Am. Chem. Soc. 1959, 81, 18, 4795–4797Publication Date (Print):September 1, 1959Publication History Published online1 May 2002Published inissue 1 September 1959https://pubs.acs.org/doi/10.…
The indirect-exchange mechanisms which produce spontaneous magnetization in metal oxides are an optimum if two interacting cations are located on opposite sides of an anion. The coupling rules which have been developed for this case are not applicable to spinels in which the cation-anion-cation angles differ appreciab…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCation Substitution in Perovskite-like Phases1,2E. J. Fresia, Lewis Katz, and Roland WardCite this: J. Am. Chem. Soc. 1959, 81, 18, 4783–4785Publication Date (Print):September 1, 1959Publication History Published online1 May 2002Published inissue 1 September 1959https://pubs…
Abstract Some general rules regarding the conformation and mode of packing of macromolecular chains in crystals are illustrated. The monomeric units occupy equivalent positions in regard to the axis of the chain. It follows that crystallizable polymers must have a type of regularity which will enable them to assume th…
Measurements of the density of a large number of experimental isotactic polypropylenes have shown that the specific volume is linearly related to per cent crystallinity as determined from x-ray data. The density is also linearly related to the absorbance of certain absorption bands in the infrared spectrum of isotacti…
The phase equilibrium relations in the systems Y 2 O 3 ‐Al 2 O 3 and Gd 2 O 3 ‐Fe 2 O 3 were examined. Each system has two stable binary compounds. A 3:s molar ratio garnet‐type compound exists in both systems. The 1:1 distorted perovskite structure is stable in the system Gd 2 O 3 ‐Fe 2 O 3 but only metastable in the…
Abstract This review has attempted to categorize and describe the degree of ozone resistance available both within and among the various elastomers. Some of the factors affecting ozone resistance and means for obtaining ozone-resistant vulcanizates have been discussed. It has been indicated that by judicious selection…