Materials Literature
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Dielectric measurements and direct‐transmission electron microscopy were used to analyze the phase separation and alteration in sodium borosilicate glasses. Metal impregnation of the glasses after leaching was particularly useful in observing the topology of separated phases whose characteristic dimensions are about 1…
Abstract Polymetaphosphate and polyethylene glycol in aqueous solution are excluded completely from rayon fibers. Determinations of nonsolvent water (δ) with these reference substances give the same value which can be used as a measure of the true swelling. The polymers can, however, penetrate into porous areas presen…
An exact solution is obtained for the axisymmetric vibrations of orthotropic cylinders by the application of the Frobenius series method. Numerical results are given for the two orthotropic materials barytes and topaz.
Dislocations have been observed and characterized in polyethylene single crystals by means of moiré patterns produced by superimposed lamellas. Analysis of the dislocations by dark and bright field electron microscopy has revealed that they are partial (imperfect) dislocations. The partials were shown to involve termi…
Results are presented from a theoretical and experimental program to investigate the damage that would be inflicted upon a missile, satellite, or space vehicle by a hypervelocity particle. Most of the work has been directed toward thin shield impacts. The problem is treated theoretically by examining the wave motion i…
The kinetics of spherulite growth of TMPS has been measured as a function of the fusion conditions (time of melting and fusion temperature) for different crystallization temperatures. The influence of fusion conditions on nucleation is described. The rates of spherulite growth (G) have been measured through the maximu…
A theory is presented for the thermodynamic mixing properties of certain charge-unsymmetrical fused salt mixtures of the type (P+—Qz+)X—. The analysis is based upon the work of Reiss, Katz, and Kleppa who showed that for charge-symmetrical molten-salt mixtures many of the thermodynamic properties of mixing could be un…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Surface Tension Study of the Interaction of Dimethyldodecylamine Oxide with Potassium Dodecanesulfonate in Dilute Aqueous SolutionMilton J. Rosen, David Friedman, and Michael GrossCite this: J. Phys. Chem. 1964, 68, 11, 3219–3225Publication Date (Print):November 1, 1964Pub…
Abstract The interaction of carbon blacks with high polymers during the mixing process was studied by using fillers having a wide range of surface characteristics. Glass beads, Graphon, high‐structure blacks, and heat‐treated blacks were mixed with elastomers in the Brabender Plasticorder. With the use as a rubber mat…
Abstract The modulus and loss angle of carbon black filler‐loaded rubbers varies with the dynamic amplitude of oscillation. The dynamic modulus change with amplitude is of a sigmoid nature. This allows the data to be reduced by a normalization technique. It is the purpose of the paper to show how the normalized data a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallization of Polymers.Eric. BaerCite this: J. Am. Chem. Soc. 1964, 86, 22, 5057Publication Date (Print):November 1, 1964Publication History Published online1 May 2002Published inissue 1 November 1964https://pubs.acs.org/doi/10.1021/ja01076a102https://doi.org/10.1021/ja…
Diffusion in the weakly paramagnetic aluminum (rich) – copper system has been investigated in a magnetic field. Aluminum – aluminum/3% copper solid diffusion couples were diffusion annealed in a magnetic field of 30 and 20 kilo-oersteds, and then analyzed for diffusion using a microhardness technique. A statistically…
Abstract The interaction of elastomers with fine particles has been a subject of great interest and much controversy for many years. This is easy to understand when it is remembered that reinforcement is one of the three great developments that underlie the extensive use of elastomers in our modern world. The other tw…
The need for a model of fabrics in the interpretation of their mechanical behaviour, especially in the low-stress range, is explained, and available models are criticized. A new model is evaluated by considering the yarn geometry to be a function of external forces and reaction forces in the fabric and assuming a rela…
The view that the glass trans ition has a th ermodynam ic basis is extended to a crosslinked rubber. The elevation of the seeond-ord er trans ition t emperature as a function of the number of cross-links is found to b e ( T(X ) -T (O / T (O) = K.X/ I -K.X, where T ( X ) is the transit ion t emperature for a rubber wit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Electronic Structures of Square-Planar Metal Complexes. V. Spectral Properties of the Maleonitriledithiolate Complexes of Nickel, Palladium, and PlatinumS. I. Shupack, E. Billig, R. J. H. Clark, Raymond. Williams, and Harry B. GrayCite this: J. Am. Chem. Soc. 1964, 86, 2…
Three crystalline modifications of isotactic polybutene-1 have been obtained from dilute solution in a variety of habits. These three crystalline modifications are: (a) tetragonal, (b) ``untwinned'' hexagonal, and (c) orthorhombic. The structure of the orthorhombic polymorph has not previously been reported. The basic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron Paramagnetic Resonance Studies of the Electronic Structures of Bis(maleonitriledithiolato)copper(II), -nickel(III), -cobalt(II), and -rhodium(II) ComplexesA. H. Maki, N. Edelstein, A. Davison, and R. H. HolmCite this: J. Am. Chem. Soc. 1964, 86, 21, 4580–4587Publica…
Abstract In this paper the various aspects of diffusion of matter in rubber are reviewed. Besides diffusion itself, attention has been given to the closely related subjects of solubility in and permeation through rubber of foreign matter. First, a survey is given of the fundamental background, including the most impor…
Room temperature tensile tests were conducted to determine the effect of hydrogen content and hydride orientation on the tensile properties of Zircaloy-4 tubing. It was found that hydride platelets oriented nearly perpendicular to the deforming tensile stress caused large reductions in strength and ductility, whereas…