Materials Literature
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Dynamic mechanical loss of solution-grown polyethylene crystals is measured by the suspension method as a function of temperature and the crystalline dispersion (α dispersion) is observed above 40°C in just the same manner as in melt-grown polyethylene. In the temperature range of this dispersion, the ratio of crystal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Fischer Reaction of Cyclohexanone Mesitylhydrazone. Evidence of a 1,4-Methyl MigrationRobert B. Carlin and Mead S. MooresCite this: J. Am. Chem. Soc. 1962, 84, 21, 4107–4112Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Conductivity of Alumina Catalyst PelletsR. A. Mischke and J. M. SmithCite this: Ind. Eng. Chem. Fundamen. 1962, 1, 4, 288–292Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published inissue 1 November 1962https://pubs.acs.org/d…
Abstract The rate of decomposition of dicumyl peroxide in natural rubber has been measured at four temperatures and the results lead to the expression k = 3.9 × 1013e−32500/RT for the rate constant. The crosslinking efficiency is high and is constant over the range 110 to 140°C. The low values found for the ratio of a…
Explosively generated plane waves were passed through plates of duraluminum, iron, and steels of various compositions and heat treatments. X-cut quartz disks of large diameter-to-thickness ratios (≥5) were used to obtain continuous stress-time profiles of elastic-plastic wave structures associated with yielding. For t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSome Reactions of Monoölefins with Iron CarbonylsT. A. ManuelCite this: J. Org. Chem. 1962, 27, 11, 3941–3945Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published inissue 1 November 1962https://pubs.acs.org/doi/10.1021/jo01058a044ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Electronic Structures and Magnetic Properties of the Chromyl and Molybdenyl IonsCurtis R. Hare, Ivan Bernal, and Harry B. GrayCite this: Inorg. Chem. 1962, 1, 4, 831–835Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published iniss…
Electron transmission microscopy and selected area diffraction have shown that the dislocation loops in aluminium bombarded with 38 Mev alpha-particles lie generally upon the {110} planes with a [110] Burgers vector normal to the loop. These loops are only seen where the alpha-particles come to rest. The theory of dif…
The composition of the equilibrium mixtures obtained on mixing known amounts of flavin mononucleotide (FMN) and reduced FMN (FMNH2) were studied by spectrophotometry, fluorimetry, and E.S.R. spectrometry. The major component of the mixtures containing more than 2mM total flavin is a species absorbing at 900 millimicro…
Abstract A good yield (97%) of MgBH 4 is obtained by interaction of magnesium hydrides with diborane in a glycol ether medium or a mixture of glycol ether and benzene (1:3) at 80°. Interaction of the borohydride with boron trichloride in benzene at ∼80° gives a 94% yield of diborane.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Formation of 1,5,7,11-Tetrathiaspiro[5.5]- undecane in the Reaction of Cyclic Trimethylene Trithiocarbonate with 2,2'-Iminodiethanol1Thomas P. Johnston, Carl R. Stringfellow Jr., and Anne GallagherCite this: J. Org. Chem. 1962, 27, 11, 4068–4070Publication Date (Print):N…
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Areas of glass formation and regions of “neo‐ceramic” glasses in the systems Biz03‐CdO‐Si02, Bi203‐Cd0‐B203, and Bi203‐Cd0‐GeO2 are demarcated. Properties of glasses in the neoceramic regions were determined before and after nucleation and heat treatment. There are no maxima or minima in the dielectric properties vers…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInertial Impaction on Single ElementsM. N. Golovin and A. A. PutnamCite this: Ind. Eng. Chem. Fundamen. 1962, 1, 4, 264–273Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published inissue 1 November 1962https://pubs.acs.org/doi/10.1021…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorinated Cyclic Polysulfides and Their PolymersC. G. Krespan and W. R. BrasenCite this: J. Org. Chem. 1962, 27, 11, 3995–4000Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published inissue 1 November 1962https://pubs.acs.org/doi/10…
Abstract Preceding papers have described the preparation of many polymers in high molecular weight by interfacial polycondensation under a wide variety of conditions. This paper reports an extended study of the optimum conditions for the stirred preparation of poly (hexamethylene sebacamide) and poly(sebacyl piperazin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbodiimides. II. Mechanism of the Catalytic Formation from IsocyanatesJohn J. Monagle, Tod W. Campbell, and Herbert F. McShaneCite this: J. Am. Chem. Soc. 1962, 84, 22, 4288–4295Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Publishe…
The specular reflectance of evaporated aluminum films has been measured with high precision (±0.1%) from 0.55 to 32 μ. The measurements were made at normal incidence on fresh and aged films deposited on fuzed quartz substrates with rapid evaporation rates at pressures of about 1×10−5 Torr. The dependence of the reflec…
Abstract Recent literature pertaining to both the theoretical aspects and experimental results of the degradation of polymers by heat and radiation is reviewed and critically evaluated. Theories of random and chain thermal degradation of vinyl polymers and co-polymers are reviewed. The degradation of polymethacrylates…
SUMMARY: The effectiveness of a number of different materials in the negative staning method for electron microscopy of viruses is evaluated. Shadowing was used to study the degree of distortion suffered by the specimen. Changes in pH value which occurred while the negative staining solution was trying were measured i…