Materials Literature
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Products of the oxidation of cis-polyisoprene boiling lower than water have been resolved and identified. They are: acetaldehyde, methyl formate, propionaldehyde, acetone, methanol, sylvan, methacrolein, ethanol, butanone, and butenone, Possible mechanisms for their origin are discussed.
Abstract Early lineations lying on a surface that becomes conically folded are themselves folded into complex spiral curves the form of which depends on the style of the fold, on the cone angle, and on the orientation of the early lineations on the fold. Breaks in the curve occur where early and cone lineations are pa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDecarboxylation. I. Kinetic Study of the Vapor Phase Thermal Decarboxylation of 3-Butenoic AcidGrant Gill Smith and Sullivan E. BlauCite this: J. Phys. Chem. 1964, 68, 5, 1231–1234Publication Date (Print):May 1, 1964Publication History Published online1 May 2002Published ini…
Abstract The interaction between nylon 6 and water has been studied from water vapor sorption isotherms, diffusion of water vapor in the polymer, and nuclear magnetic resonance (NMR) properties. The variations in water sorption properties of various heat treated specimens seem to result from the difference in the degr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen Adsorption on Silver, Gold, and Aluminum. Studies of Parahydrogen ConversionS. J. Holden and D. R. RossingtonCite this: J. Phys. Chem. 1964, 68, 5, 1061–1067Publication Date (Print):May 1, 1964Publication History Published online1 May 2002Published inissue 1 May 196…
The effect of urea on gelatin gels was studied by measuring gel rigidity at different gelatin and urea concentrations. Rigidity of gels was expressed as the force necessary to depress the gel with a standard plunger a distance of 4 mm. In agreement with the data in the literature, a straight-line relationship was obta…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhosphorus- and Arsenic-Bridged Complexes of Metal Carbonyls. VII. Complexes Derived from Iron Dicarbonyl DinitrosylR. G. Hayter and L. F. WilliamsCite this: Inorg. Chem. 1964, 3, 5, 717–719Publication Date (Print):May 1, 1964Publication History Published online1 May 2002Pub…
Abstract A series of polyesters of trans ‐1,4‐cyclohexanedimethanol was prepared and the melting points compared with those of the analogous series of polyesters prepared from p ‐xylylene glycol. Only slight differences in melting points were noted between the corresponding pairs of polyesters prepared from a single a…
An attempt is made to produce a model for the small strain elastic constants of polycrystalline carbons and graphites in terms of the dislocations present in the crystallites constituting the material. The model is mainly based on the effects of fast neutron irradiation on the moduli of reactor graphites and carbons,…
Deposits of ferruginous nickeliferous lateritic soils formed by weathering in place of ultramafic rocks occur at several places in northwestern California and southwestern Oregon, mostly in the Klamath Mountains province. Most of the deposits have been derived from relatively fresh peridotite, although at least one de…
Abstract Studies were conducted on the retention of Cu and Zn by H‐montmorillonite in relation to associated anion, salt concentration reaction time, pH of the equilibrium solution, and techniques. Under conditions where the pH of the equilibrium solution was too acid for formation of Cu(OH) 2 , the amounts of Cu and…
It is shown how the usual theory of phonon interaction may be extended to cover the case of one phonon having a wavelength larger than the mean free path of those with which it interacts. The results are applied to a consideration of the absorption of sound in dielectrics at arbitrary temperature.
This paper describes ``thermal dissociation'' or ``atomization,''H2⇌2 H,on a Mo or W catalyst, from 1200° to 2500°K. We emphasized transient behavior of individual species (especially H) caused by changing catalyst temperature. Reaction rates, and equilibria derived from them, confirm Langmuir's results of 50 years ag…
Abstract Das System Platin–Aluminium wurde durch thermische Analyse und rötgenographische Untersuchungen aufgeklärt. Dabei wurden folgende intermetallische Phasen gefunden: ”︁PtAl 4 „, PtAl 3 , PtAl 2 , Pt 2 Al 3 , PtAl, Pt 3 Al 2 , Pt 5 Al 3 , Pt 3 Al und Pt 13 Al 3 . Die Kristallstruktur von Pt 2 Al 3 (ähnlich Ni 2…
Measurements of the temperature dependence of the longitudinal and shear ultrasonic attenuation from 5 to 50 Mc/sec were made in SiO2, GeO2, B2O3, and As2O3 glass. In each case a relaxation loss with a distribution of relaxation times was found. The median activation energy of the relaxation process is about 500 cal/m…
The thermal decomposition of the ammonium sul‐fate, carbonate, nitrate, oxalate, and sulfate salts of praseodymium, neodymium, and samarium was investigated thermogravimetrically in the temperature range 25° to 1400° C. Each salt was decomposed at a heating rate of 2.5° C per minute. The pyrolytic sequences have been…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel Ring Expansion and Carbon Insertion Reactions of IsatogensWayland E. Noland and Robert F. ModlerCite this: J. Am. Chem. Soc. 1964, 86, 10, 2086–2087Publication Date (Print):May 1, 1964Publication History Published online1 May 2002Published inissue 1 May 1964https://pub…
Abstract The reaction between dicumyl peroxide and butyl rubbers has been followed by means of molecular weight measurements. In all cases except that of the rubber with highest unsaturation the molecular weight falls, and the scission efficiency of the peroxide is found to depend quite markedly upon the unsaturation.…
Blends of nylon-epoxy resins are used as adhesives. It is found by swelling tests that the epoxy resin crosslinks the nylon. By the failure of poly-N,N'-diisobutylhexamethyleneadipamide to cure and by the failure of prereactions of the nylon with phenyl glycidyl ether, it is shown that the epoxy resin reacts with the…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTThe High Temperature Vaporization Properties of Boron Carbide and the Heat of Sublimation of Boron1Harry E. Robson and Paul W. GillesCite this: J. Phys. Chem. 1964, 68, 5, 983–989Publication Date (Print):May 1, 1964Publication History Published online1 May 2002Published inissue…