Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Effect of Various Parameters on the Rate of Formation of Fibers from Collagen Solutions1Howard B. Bensusan and Barbara L. HoytCite this: J. Am. Chem. Soc. 1958, 80, 3, 719–724Publication Date (Print):February 1, 1958Publication History Published online1 May 2002Published…
The cha nges in chemical structure occu ring in pol y (vinyl chloride) as a res ul t of heati ng ina vacu um in t he range 100 to 400 C wer e studied using infrared spectropho to metry. The pri ncip a l changes occ urri ng in t he residue during p yrolysis in a vacuum were the format ion of unsaturated s tructures a n…
Abstract Butadiene copolymers of low molecular weight containing combined acid groups react with metal oxides to give products with unusual properties. The salts, particularly the zinc and cadmium compounds, exhibit plastic flow under slowly applied stresses but are highly elastic on sharp impact; products closely res…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantitative X-Ray Diffraction AnalysisL. E. Copeland and R. H. BraggCite this: Anal. Chem. 1958, 30, 2, 196–201Publication Date (Print):February 1, 1958Publication History Published online1 May 2002Published inissue 1 February 1958https://doi.org/10.1021/ac60134a011RIGHTS &…
Calcite crystal fragments of known surface area were decomposed in controlled carbon dioxide atmospheres. The decomposing sample was weighed continuously on an automatically recording thermobalance and a rate of weight loss per unit area was obtained. A rate expression involving actual and equilibrium CO 2 pressures a…
The superexchange interaction energy for an ${\mathrm{Fe}}^{3+}$-${\mathrm{O}}^{2\ensuremath{-}}$-${\mathrm{Fe}}^{3+}$ linkage is considered for seven oxides in which ${\mathrm{Fe}}^{3+}$ is the only magnetic ion present, and for magnetite. The superexchange energy may be estimated from the value of $\frac{{T}_{C}}{n}…
The relations between corrosion rates and different forms of sulfide corrosion product are defined by the application of standard and novel x-ray diffraction studies of the corrosion products. Preliminary studies showed that in aqueous-H2S environments, different sulfides affect the corrosion rate of steel in various…
A general Hamiltonian formalism is developed to treat from first principles the motion of electrons in solids, including their mutual Coulomb interaction. By a series of canonical transformations it is shown that under suitable circumstances (which obtain in nearly all solids) plasmons (a quantized collective plasma o…
Abstract Differential dissolution in NaOH solution was investigated as a means of purification of clay. It was discovered that a large quantity of allophane and free alumina and silica were dissolved from clay preparations in 0.5 N NaOH solution by boiling for as little as 2.5 min, provided the ratio of clay weight to…
Integro-differential equations are obtained, which describe the variation of molecular weight distributions in a polymer substance caused by irradiation. The solutions of these equations give the gel point and the average molecular weights. In the case of cross-linking without cyclization, the results agree with those…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared Absorption Spectra of Inorganic Coördination Complexes. XIV. Infrared Studies of Some Metal Thiourea Complexes1aA. Yamaguchi, R. B. Penland, S. Mizushima, T. J. Lane, Columba Curran, and J. V. QuaglianoCite this: J. Am. Chem. Soc. 1958, 80, 3, 527–529Publication Dat…
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A series of experiments using paramagnetic resonance at microwave frequencies and in the 1-4\ifmmode^\circ\else\textdegree\fi{}K temperature range on ${\mathrm{Gd}}_{2}$${\mathrm{Mg}}_{3}$${({\mathrm{NO}}_{3})}_{12}$\ifmmode\cdot\else\textperiodcentered\fi{}24${\mathrm{H}}_{2}$O, ${\mathrm{K}}_{3}$Cr${(\mathrm{CN})}_{…
Tight-binding calculations, using a two-dimensional model of the graphite lattice, lead to a point of contact of valence and conduction bands at the corner of the reduced Brillouin zone. A perturbation calculation which starts with wave functions of the two-dimensional lattice and is applied to the three-dimensional l…