The influence of morphology on the mechanical properties of crystalline polymers
Abstract
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Surface energy of solids
R. G. Linford, Chem. Soc. Rev., 1972, 1, 445 DOI: 10.1039/CS9720100445
The Development of Texture in Copper and Copper‐Zinc Alloys
The crystallite orientation distribution function has been determined for cold‐rolled copper, copper‐10 per cent zinc and copper‐30 per cent zinc ( α ‐brass) at cold reductions of 0, 20, 40, 60, 80, 90 and 95 per cent. The copper texture exhibits a steady development and contains a tube of orientations between limits…
Single-crystal study of Prussian Blue: Fe4[Fe(CN)6]2, 14H2O
A single-crystal X-ray structure analysis of Prussian Blue, Fe4[Fe(CN)6]3,14H2O, reveals that the space group symmetry of the approximate structure is Oh5-Fm3m with occupancy factors of 0·75 for FeII, C, and N; the more detailed investigation demonstrates deviations from the cubic face-centred symmetry.
Organosilicon Films Formed by an RF Plasma Polymerization Process
The purpose of this research was to develop a plasma polymerization process for producing polymeric films and to achieve an understanding of the chemistry involved. A technique for the production of polymer coatings from a capacitively coupled RF plasma is presented. The resulting films contain trapped free radical si…
Magnetic properties of a series of hydroxo-bridged complexes of 2,2'-dipyridyl and copper(II)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of a series of hydroxo-bridged complexes of 2,2'-dipyridyl and copper(II)James A. Barnes, Derek J. Hodgson, and William E. HatfieldCite this: Inorg. Chem. 1972, 11, 1, 144–148Publication Date (Print):January 1, 1972Publication History Published online1 Ma…
The Effect of Fluoride Ion on the Anodic Behavior of Titanium in Sulfuric Acid
The anodic behavior of titanium in the presence of fluoride ion and sulfuric acid has been studied. Fluoride ion accelerates active corrosion and results in more active, time‐dependent corrosion potentials and greatly increased current requirements for passivation. The critical current density is found to be first ord…
Mathematics of the Electrochemical Extraction of Hydrogen from Iron
The transient current of hydrogen removal from iron following steady‐state permeation is analyzed theoretically for two limiting conditions at the input side. For the fastest possible removal ( C = 0 at X = 0 and at X = L ) , the amount extracted at the potentiostated side ( X = L ) is one third of the total present a…
Critical Potential for Growth of Localized Corrosion of Stainless Steel in Chloride Media
A series of investigations were carried out to determine the critical potentials for the growth of localized corrosion on Type 316 and Type 316L stainless steel in chloride media using artificial specimens having the macroscopic local anode separated from the cathode. The critical potential value for the pitting in 0.…
Dielectric study of the motion of molecules in the supercooled liquid state
A dielectric study of dilute solutions of small molecules in ortho-terphenyl in the supercooled liquid state shows that their microbrownian motions may occur at 105 to 1010 s slower than in normal low viscosity solvents. The dielectric loss curves are far broader than a single relaxation time process with an apparent…
A Thorough Thermodynamic Evaluation of the Silicon-Hydrogen-Chlorine System
A sensitive computational method allowed the determination of 0.7 kcal/mol based on various previously reported experimental investigations. For the first time the gaseous compounds and were included in a thermodynamic evaluation of the Si‐H‐Cl system. Diagrams relating over the temperature range of 400°–1700°K indica…
The meso-reactivity of porphyrins and related compounds. Part V. The meso-oxidation of metalloporphyrins
The action of hydrogen peroxide in pyridine on a variety of metal complexes (Mn, Fe, Co, Ni, Cu, and Zn) of octa-ethylporphyrin under specified conditions has been shown to give metal octaethyloxophlorin derivatives in those cases where the complexed metal ion has a readily available higher oxidation level. Manganese(…
Antiferromagnetism in transition-metal complexes. Part IV. Lowlying excited states of binuclear copper(II) carboxylate complexes
The singlet–triplet–singlet model describing the anomalous magnetic properties of binuclear copper(II) carboxylates is applied to the available experimental data on some 140 compounds. About one-sixth of the data was eventually rejected because of the poor fit with both this and the Bleaney–Bowers model. The trend in…
Dynamic Recrystallization of Copper during Hot Torsion
Tubular specimens of oxygen-free, high-conductivity copper have been deformed by hot torsion at 800° C (1073 K) (O.8T m ) or at 950° C (1323 K) (0.9T m ) at strain rates of 3.7–11.1 S−1 to true strains of ∼ 30. The specimens were quenched to room temperature in 3 s under one of two conditions: stopping the deformation…
Transition-metal tetra-oxo-complexes and their vibrational spectra
The vibrational spectra of a number of transition metal tetra-oxo-complexes are reported for the first time, including those of salts containing the anions [RuO4]–; [MO4]2–(M = Mn, Fe, or Ru); [MO4]3–(M = Cr, Mn, Re, or Fe); and [MO4]4–(M = Ti, V, Cr, Mo, W, Fe, or Co). From these measurements and published data on th…
Effect of molecular weight on the crystallization and morphology of poly (ethylene oxide) fractions
Abstract The temperature dependence of the isothermal growth rate of spherulites and overall crystallization kinetics of different fractions of poly (ethylene oxide) over the range of molecular weight from 300 to 20,000 were studied by calorimetry, dilatometry, and polarized light microscopy, in order to establish the…
Analysis of the Temperature-Dependent Phonon Structure in Sodium Nitrite by Raman Spectroscopy
The temperature behavior of the TO-phonon frequencies and line shapes in NaN${\mathrm{O}}_{2}$, as observed by Raman spectroscopy, is reported for temperatures from 20 to 250\ifmmode^\circ\else\textdegree\fi{}C. The Raman spectra of the ferroelectric phase obeyed the selection rules of the ${C}_{2V}^{20}$ space group.…
Some aspects of the light protection of polymers
Abstract
Stress Corrosion Spectrum
Despite many attempts over the years to rationalise stress corrosion cracking in terms of a single mechanism, it is proposed that the growing body of evidence more readily supports a continuous spectrum of mechanisms. Thus, it is suggested that in those systems of metal and environment where the conditions are between…
Differential Thermal Analysis
Differential thermal analysis (DTA) is an instrumental technique used for studying the physical and chemical changes that occur in materials as they are heated or cooled. When a material undergoes a physical change, such as melting or crystalline transformation, or when a chemical reaction occurs, energy is either abs…