Materials Literature
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Nylon 66, nylon 6, antistatic nylon 66, and polyester yarns of various lusters were made into commercial warp-knitted fabrics using some dyes that retarded and others that promoted photodegradation. These fabrics, together with undyed ones, were exposed under glass and by direct weather in Florida to determine the rel…
The CaO formed by complete isothermal decomposition of calcite single crystals in vacuum has surface areas that range from 127.10 m 2 g at 650°C to 60 ± 20 m 2 /g at 900°C. Surface areas are not significantly reduced by annealing at 900°C in vacuum. SEM observations and other available data show that CaO particles, wh…
The effect of the front of impulse voltages on the breakdown of nonuniform gaps in SF6 has long been reported to be unsystematic. The present study provides an explanation to this phenomenon by examining the breakdown probability distributions of rod- plane gaps in SF6 over a wide range of gas pressure and under diffe…
The influence of redox couples on the measured flatband potentials of n-CdSe was investigated. It is concluded that flatband shifts are due to interface surface state-redox electrolyte carrier exchange that leads to variable interface state charge. Interface state densities ∼2×1012 cm−2, were determined with thin anod…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe effects of solvent on axial ligation constants of a cobalt(II) porphyrinD. Paul Rillema, C. M. Wicker Jr., R. D. Morgan, L. F. Barringer, and L. A. ScismCite this: J. Am. Chem. Soc. 1982, 104, 5, 1276–1281Publication Date (Print):March 1, 1982Publication History Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon monoxide affinities of iron(II) octaethylporphyrin, octaethylchlorin, and octaethylisobacteriochlorinS. H. Strauss and R. H. HolmCite this: Inorg. Chem. 1982, 21, 3, 863–868Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties of block copolymers and homopolymer blends comprised of 1,2-polybutadiene and 1,4-polybutadieneRobert E. Cohen and D. E. WilfongCite this: Macromolecules 1982, 15, 2, 370–375Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Publis…
Permanent magnet alloys in the CrCoFe family and containing 5–25 wt. % Co and 18–31 wt. % Cr have been prepared by a variety of powder metallurgical techniques. Dense (relative density generally greater than 95%) samples of these alloys were prepared by solid-state or liquid-phase sintering of elemental or prealloyed…
Abstract Thermal analysis and limiting oxygen index flammability tests were used for elucidation of details in phosphorous‐nitrogen synergism in cotton modified with methylol phosphonopropionamide and subsequently hydrolyzed by acid. The results indicate that not all the phosphorus incorporated into the material is ef…
Abstract Effects of supercooling have been studied in a range of basaltic melts by isothermal and constant cooling rate experiments at one-atmosphere, using the wire-loop container method. The nucleation of plagioclase in these melts is systematically controlled by supercooling (-Δ T ), time below the liquidus tempera…
The chemical group contribution technique, based on the principle of additivity of molar refraction and polarization constants for groups in a molecule, has been used for determining the solubility parameters of acrylamide series polymers. The solubility parameter for a polymer is calculated through its components by…
The conductivity of solutions was determined at temperatures from −30° to +60°C. The maximum specific conductivities at −30°, 30°, and 60°C were found to be 3.25, 6.7, 8.7 mmho cm −1 , respectively. The discharge performance of sandwich‐like glass laboratory cells was determined at rates of 0.8–13 mA cm −2 over this t…
A comparison has been carried out between the results of analyses of several sets of neutron powder diffraction data using three different methods: the Rietveld method [Rietveld (1967). Acta Cryst. 22, 151-152; (1969) J. Appl. Cryst. 2, 65-71], a modification of the Rietveld method to include off-diagonal terms in the…
Mössbauer spectra of 197Au in Cs2Au2Cl6 were studied at 1 bar (4.2 and 45 K) and at 68 kbar (2.1, 4.2, 25, 40, and 45 K). Further, 197Au spectra in Cs2AgAuCl6 were studied at 1 bar and 31 kbar (4.2 K) and in AuI at 1 bar and 45 kbar (4.2 K). The pressure-induced changes in the isomer shifts and quadrupole splittings o…
A micromechanical model is presented to relate the mechanical properties of low‐density fibrous ceramic bodies to their micro‐structures and the properties of the fibers. It is found that properties such as the elastic moduli, fracture toughness, and strength depend on the fiber spacing. In particular, it is shown tha…
Abstract A du Pont 990 differential scanning calorimeter was modified to measure thermal conductivity of elastomer vulcanizates. The method is quick and reproducible and is recommended for scouting research of polymeric materials. The thermal conductivity λ values obtained by this method of some known materials compar…
High temperature gaseous equilibria involving the lower-valent uranium fluorides UF, UF2, UF3, and UF4 were studied by mass spectrometry, and reaction enthalpies and entropies with estimated uncertainties of ±2 kcal/mol and ± 2 cal/deg mol were derived solely from the temperature coefficients of reaction equilibrium c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular structure and quadratic force field of chromyl chloride, CrO2Cl2C. J. Marsden, Lise Hedberg, and Kenneth HedbergCite this: Inorg. Chem. 1982, 21, 3, 1115–1118Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Published inissue 1 Mar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties of two-dimensional polymersJan Tobochnik, Itzhak Webman, Joel Lebowitz, and M. H. KalosCite this: Macromolecules 1982, 15, 2, 549–553Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Published inissue 1 March 1982https://pubs.acs.…
The paper characterizes point processes with the order statistic property without the unnecessary condition of finiteness of the first moment of the process, a condition imposed by previous researchers. It shows that the class of these processes is composed only of mixed Poisson processes up to a time-scale transforma…