Materials Literature
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A procedure for the derivation of the molecular weight distribution in a degrading branched polymer is developed. In the explicit calculations only sizes up to about twice the distance between branch points are considered. This is adequate to describe the rates of volatilization in the pyrolysis of polyethylenes. Expr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon–Oxygen and Carbon–Hydrogen Surface ComplexesR. Nelson Smith, Jack Duffield, Robert A. Pierotti, and John MoolCite this: J. Phys. Chem. 1956, 60, 4, 495–497Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 195…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Aging Solutions of Barium Chloride on Particle Size of Barium SulfateE. J. Bogan and H. V. MayerCite this: Anal. Chem. 1956, 28, 4, 473–476Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://pubs…
In the two-dimensional soap froths, made in the narrow space between two parallel glass plates, thin soap films partition the space into polygonal cells. The probability of occurrence of n-sided polygons (3 ≤n≤12) is calculated from two models, using the technique previously developed by the author for cooperative phe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective Acetylation of the Hydroxyl Groups in GelatinJ. Bello and J. R. VinogradCite this: J. Am. Chem. Soc. 1956, 78, 7, 1369–1372Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://pubs.acs.org/doi/10.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the Steam–Carbon ReactionJesse S. Binford Jr. and Henry ByringCite this: J. Phys. Chem. 1956, 60, 4, 486–491Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://pubs.acs.org/doi/10.1021/j150538a…
The study of fundamental properties such as specific heat and electrical resistivity in pure metals has made it very important to know the influence of small amounts of impurity. This has led us to undertake a detailed investigation of the sodium–potassium equilibrium diagram. Previous work had indicated zero solid so…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDecomposition of Carbon-Nitro CompoundsKenneth A. WildeCite this: Ind. Eng. Chem. 1956, 48, 4, 769–773Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://doi.org/10.1021/ie50556a030RIGHTS & PERMISSIONSArti…
Calorimetric combustions of calcium metal were conducted at an initial temperate of 25 degree under an oxygen pressure of 50 atm. The energy of combustion under these conditions was to be 15,649 joules/g. The corresponding standard heat of formation of the oxide from the elements is calculated to be -628.63 +- 0.99 kj…
The quadrupolar hyperfine structure of the Al27 and Be9 nuclear magnetic resonance peaks in beryl crystal at 300°K have been examined. From the observed spectra, the following values were obtained for the nuclear spins I, the effective nuclear magnetic moments μ, the nuclear quadrupole coupling constants eQ[open phi]z…
The compressibility and the specific volume of liquid p-azoxyanisole are studied in the temperature range of the anisotropic-isotropic transition. Both quantities exhibit easily observable pretransitional variations in an interval extending more than two centrigrade degrees either side of the transition. The pretransi…
A theory of the lattice vibration and specific heat of graphite, which has a typical lamellar structure, is worked out using the Born-von Kármán method. Four types of restoring forces are assumed; the first and second ones are associated with changes in the bond lengths and bond angles of the honey-comb net planes, re…
Abstract From specific heat measurements on drawn, undrawn, and annealed polyethylene terephthalate over the temperature range – 10 to 280° it has been possible to observe the magnitude of: ( a ) the glass transition, ( b ) recrystallization effects, and ( c ) the change of crystallinity with temperature. The change i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExplosion Limits of Ozone-Oxygen MixturesGerhard A. Cook, Edward Spadinger, Alfred D. Kiffer, and Charles V. KlumppCite this: Ind. Eng. Chem. 1956, 48, 4, 736–741Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 195…
A laboratory apparatus has been constructed to study the pilling of fabrics. Work was concentrated on nylon and nylon blended woven fabrics. The following variables were studied; nylon content, fibre denier and staple length, yarn twist, doubling yarns, ends and picks, type of weave, milling, heat-setting, dyeing, wet…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeat Capacities at Low Temperatures and Entropies of Five Spinel MineralsB. G. KingCite this: J. Phys. Chem. 1956, 60, 4, 410–412Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://pubs.acs.org/doi/10.1021…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAbsorption Spectra of para-Substituted Tetraphenylporphines1,2Daniel W. Thomas and Arthur E. MartellCite this: J. Am. Chem. Soc. 1956, 78, 7, 1338–1343Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Properties Of MetalloporphyrinsR. J. P. WilliamsCite this: Chem. Rev. 1956, 56, 2, 299–328Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://pubs.acs.org/doi/10.1021/cr50008a004https://doi.org/10.1021…
Various methods for the preparation of mixtures for phase equilibrium studies are described. Especial attention has been paid to compositions which cannot be preserved in a glass structure.
The variation with temperature of solute atom density close to (within similar 10 A) an edge dislocation is examined. The results of this analysis are used to predict the effect of temperature on the yield point. Good agreement is found between theoretical prediction and three apparently dissimilar experimental result…