Materials Literature
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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…
The dispersion relation for the longitudinal acoustic lattice waves propagating in the direction of the hexad axis in (pyrolitic) graphite, at room temperature, has been determined by neutron spectrometry. The dispersion curve has very closely the form of a sine curve, with a maximum frequency of (3.84\ifmmode\pm\else…
Abstract This is a review of silicone rubber and challenging it is since the silicones, a relatively new group of completely synthetic materials, are growing very rapidly even when viewed against today's rapidly advancing technology. The silicones bring together something of the properties of inorganic materials with…
This paper is concerned with an investigation of the electrical,the galvanomagnetic, and the thermoelectric properties of pyrolytic graphites whose morphological features are conditioned by the deposition temperature, the heat treatment, and the doping level. (1) Basal-plane magnetoresistance and c-direction specific…
Isothermal sections at 600°, 650°, 700°, 750°, and 800° C, run for the most part at 15 kilobars total pressure, were obtained using a squeezer-type apparatus. Above approximately 675° C. the system contains two two-phase and two single-phase areas. One single phase region extends a short distance into the ternary syst…
By slow removal of CO2 from Ca(HCO3)2 solution containing MgCl2 at room temperature, pure and homogeneous aragonite crystals were obtained. During the crystal syntheses, labeling with either or both C14 and Ca45 was feasible.
The phase equilibrium diagram for the binary system bismuth sesquioxide-niobium pentoxide has been constructed from observations of fusion characteristics and X-ray diffraction data. In the system five binary compounds were observed with Bi(2)O(3):Nb(2)O(5) ratios of 5:3, 1:1, 4:9, 1:5, and 1:6. The 1:1 compound was f…
Abstract The nonohmic behavior of carbon black‐loaded natural rubber viilcanizates was studied. Three samples contained high‐abrasion furnace black (HAF) in good, moderate, and poor dispersion. Another sample contained a good dispersion of medium thermal black (MT). The nonohmic behavior of the poor HAF dispersion and…
Abstract A variety of metastable conditions can be produced in polypropylene of normal commercial tacticity by quenching, cold drawing, and annealing. The resultant x‐ray patterns suggest a two‐component three‐phase model of the molecular organization, and such a model has suffcient scope to produce good agreement bet…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallographic Data for New Rare Earth Borate Compounds, RX3(BO3)4A. D. MillsCite this: Inorg. Chem. 1962, 1, 4, 960–961Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published inissue 1 November 1962https://pubs.acs.org/doi/10.1021/…
The adsorbed surface species which result when aluminum oxide is exposed to methanol or ethanol vapor have been studied. Three different surface species have been identified for both methanol and ethanol. At 35°C a weakly bound layer of liquid alcohol is observed, which is removed by evacuation. Another species which…
Expressions have been derived for the optical birefringence and elastic moduli of an idealized semicrystalline polymer in terms of the molecular orientation. The predicted birefringence and moduli show qualitative agreement with previous experimental data for polyethylene at low extension ratios. A result of particula…
"Applied Clay Mineralogy." Geologiska Föreningen i Stockholm Förhandlingar, 84(4), p. 533
Abstract Equations are given for estimating equivalent isothermal life from thermogravimetric data and for estimating the apparent activation energy for volatilization even though the nature of the kinetic process is unknown. Illustrative data for polytetrafluoroethylene are presented. The importance of using sample t…