Refractive index increments of polyolefins
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Materials Literature
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Order-disorder transition in MgAl2O4 spinel at high temperatures up to 1700 °C
Article Order-disorder transition in MgAl2O4 spinel at high temperatures up to 1700 °C was published on December 1, 1983 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 165, issue 1-4).
Brillouin scattering study of ferroelectric NH4LiSO4: Relaxation time and anomalous temperature dependence of elastic constants
A relaxation time of the order parameter in the ferroelectric phase of ammonium lithium sulfate has been determined by analyzing anomalous temperature dependence of the Brillouin peak intensity. It is shown that the anomalies of the elastic constants associated with the phase transition cannot be interpreted by a conv…
Survey of Diatoms in the Upper Oligocene and Lower Miocene in Holes 515B and 516F
Samples from the upper Oligocene and lower Miocene of Holes 515B (Brazil Basin) and 516F (Rio Grande Rise) were examined for fossil marine diatom content. The preservation of the diatoms was poor and the species diversity low in both holes. However, it was possible to zone portions of the intervals studied using the z…
Dislocation relaxation peaks involving hydrogen drag in deformed Ni-H alloys
The internal friction and modulus changes in pure and hydrogenated nickel are measured after plastic deformation at frequencies of 2 Hz and 30 kHz. The hydrogen dissolution strongly diminishes a Bordoni-type peak (B peak) but develops a Snoek–Köster-type peak (SK peak) at a temperature well above the B peak. The SK pe…
Programmed cooling experiments in the system MgO-SiO2; kinetics of a peritectic reaction
Programmed cooling experiments with compositions in the system MgO-SiO 2 ranging from 59 wt.% SiO 2 (with olivine on the liquidus) to 63 wt.% SiO 2 (with protoenstatite on the liquidus) cooled at rates of from 0.4 to 25% min crystallize forsterite but not pyroxene. Because pyroxene does not nucleate, the forsterite pl…
Dc Voltage Breakdown of SF6-Air and SF6-CO2 Mixtures in Rod-Plane Gaps
dc breakdown and corona inception voltages are reported for SF6-air and SF6-CO2 mixtures in positive and negative rod-plane gaps. These voltages are compared with values obtained for SF6-N2 mixtures. The results show that the breakdown voltages of SF6-air mixtures exhibit corona stabilization over a pressure range whi…
Deacylation and deformylation of pyrroles
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeacylation and deformylation of pyrrolesKevin M. Smith, Michiko Miura, and Hani D. TabbaCite this: J. Org. Chem. 1983, 48, 24, 4779–4781Publication Date (Print):December 1, 1983Publication History Published online1 May 2002Published inissue 1 December 1983https://doi.org/10…
MNDO studies of proton affinity as a probe of electronic structure. 2. Boranes and carboranes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMNDO studies of proton affinity as a probe of electronic structure. 2. Boranes and carboranesRoger L. DeKock and Craig P. JasperseCite this: Inorg. Chem. 1983, 22, 26, 3843–3848Publication Date (Print):December 1, 1983Publication History Published online1 May 2002Published i…
The Sodium-Bonding Pin Concept for Advanced Fuels Part I: Swelling of Carbide Fuel up to 12% Burnup
A detailed analysis of hyperstoichiometric carbide fuel, which operated under sodium-bonding conditions up to 12.5 at. % burnup in the Rapsodie reactor, yields the description of the four contributions to geometric fuel swelling as functions of temperature and burnup: (a) solid fission products and cesium, (b) fission…
Synthesis, characterization, and diels–alder extension of cyclopentadiene telechelic polyisobutylene. IV. α,ω‐Di(3‐cyclopentadienylpropyldimethylsilyl)polyisobutylene
Abstract The synthesis and chain extension of polyisobutylene having nonfluxional terminal cyclopentadiene groups is described. The fluxional behavior of silylcyclopentadiene end groups was previously found to prevent Diels–Alder dimerization of the end groups. The incorporation of a propyl moiety between the silicon…
Rearrangement of Porous CaO Aggregates During Calcite Decomposition in Vacuum
High‐resolution SEM photographs, N 2 adsorption isotherms, Hg porosimetry, and micrometer measurements were used to characterize CaO particle shapes and pore‐size distributions that result when calcite crystals are decomposed in vacuum at 686°C. The surface area of the CaO produced from large calcite crystals is const…
Anionic Copolymerization of Elemental Sulfur with Propylene Sulfide. Equilibrium Sulfur Concentration
In the anionic copolymerization of elemental sulfur (S8) with propylene sulfide (P) below the floor temperature of elemental sulfur homopolymerization (Tf = 159°C), there is a certain concentration of elemental sulfur left when copolymerization is completed ([S8]eq). The dependence of [S8]eq on the feed ratio [P]0/[S8…
The chemistry, reflectance, and cell size of the erlichmanite (OsS2)-laurite (RuS2) series
Abstract Microprobe analyses of members of the erlichmanite-laurite series from Guma Water and Senduma, Sierra Leone and Tanah Laut, Borneo, indicate that complete solid solution is possible between OsS 2 and RuS 2 with considerable substitution of Os and Ru by Ir, Rh, and Pt. The cell size of the erlichmanite from Gu…
Melting Reactions of Soda‐Lime‐Silicate Glasses Containing Sodium Sulfate
Various Na 2 SO 4 ‐Na 2 CO 3 ‐CaCO 3 ‐SiO 2 combinations were studied by differential thermal analysis to elucidute the role of Na 2 SO 4 in soda‐lime‐silica glassmelting reactions. It was found that Na 2 SO 4 encourages the formation of wollastonite at 850° to 900°C. The solid‐state reaction of Na 2 Ca(CO 3 ) 2 occur…
Redox chemistry of iron tetraphenylporphyrin imidazolate-chelated protoheme, and of their iron(II)-superoxide adducts in dimethyl sulfoxide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox chemistry of iron tetraphenylporphyrin imidazolate-chelated protoheme, and of their iron(II)-superoxide adducts in dimethyl sulfoxideStephen E. Jones, G. Susan Srivatsa, Donald T. Sawyer, Teddy G. Traylor, and Terry C. MinceyCite this: Inorg. Chem. 1983, 22, 26, 3903–3…
Chloroantimonate(III), IV. Darstellung und Kristallstruktur von 2,2′-Bipyridinium-pentachloroantimonat (C10H8N2H2)SbCl5 und der metastabilen Modifikation von 4,4′ -Bipyridinium-pentachloroantimonat (C10H8N2H2)SbCl5 / Chloroantimonates(III), IV. Preparation and Crystal Structures of 2,2′-Bipyridinium Pentachloroantimonate (C10H8N2H2)SbCl5 and of the Metastable Modification of 4,4′-Bipyridinium Pentachloroantimonate (C10H8N2H2)SbCl5
2,2′-Bipyridinium pentachloroantimonate (III) and the metastable modification of 4,4′-bipyridinium pentachloroantimonate(III) were synthezised and investigated by single crystal X-ray diffraction analysis. The structures consist of 2,2′-bipyridinium and 4,4′-bipyridinium cations, respectively, and of pentachloroantimo…
Preparation and chemical and physical properties of the new layered phasesLixTi1−yMyS2withM=V,Cr,orFe
We have prepared the layered compounds $\mathrm{Li}{\mathrm{Ti}}_{1\ensuremath{-}y}{M}_{y}{\mathrm{S}}_{2}$ ($M=\mathrm{V},\phantom{\rule{0ex}{0ex}}\mathrm{C}\mathrm{r},\phantom{\rule{0ex}{0ex}}\mathrm{F}\mathrm{e}$) by direct synthesis from a mixture of ${\mathrm{Li}}_{2}$S and the appropriate elements. The structure…
Modification of the ASTM Standard Ferric Sulfate-Sulfuric Acid Test and Copper-Copper Sulfate-Sulfuric Acid Test for Determining the Degree of Sensitization of Ferritic Stainless Steels
The ASTM standard ferric sulfate-sulfuric acid test (ASTM A262-B) and copper-copper sulfate-sulfuric acid test (ASTM A262-E) have been modified to quantify the degree of sensitization (DOS) of ferritic stainless steel Types 430, 430 Ti, 430 Nb, 434, 444, and 446. The modified ferric sulfate-sulfuric acid test consists…
Emergence of Smectic Mesophase in Binary Mixtures of Pure Nematogens
Binary mixtures both components of which are liquid crystals are known to form continuous mixed liquid crystals.1 Most of them do not undergo any change in their mesomorphic textures, though a few have been found to give rise to different textures.2 We report here a binary system consisting of (A) p-nitrophenyl-p'-n-a…