Materials Literature
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Polymorphic transitions in CasSiO 6 have been investigated by precise high‐temperature X‐ray diffractometer measurements and by differential thermal analyses. In addition to change caused by normal thermal expansion, three principal crystallographic transformations take place: α‐triclinic–β–triclinic (sluggish) in the…
Abstract The memory of irradiated polyethylene has been studied with emphasis on the magnitude of the restoration force exerted by the deformed polymer during the process of restoration to the nonstressed state and on the degree of completeness with which restoration occurs. The particular form of the memory effect st…
Abstract Measurement of butadiene absorption at constant volume, and of polymer formation, indicated that the rate of polymerization was first order in monomer concentration, up to 1.5 mole/l., and also in initial total catalyst concentration, for given molar ratio of alkyl to titanium ester. The overall activation en…
Abstract Soils having different values of permanent charge (CECp), variable charge (CECv), and anion‐exchange capacity (AEC) were treated with hydroxyl, sulfate and hydrogen saturated exchange resins. The AEC was then principally OH ‐ or SO 4 2‐ saturated while CECp was principally saturated with aluminohydronium and…
Abstract The infrared active normal vibrations of isotactic polypropylene and its deuterated derivatives in the crystalline state have been treated. The modified Urey-Bradley-Shimanouchi force field has been used for the calculations. A total of 23 potential constants have been adjusted by the method of least squares…
Abstract The rate of crosslinking of concentrated gelatin solutions in water has been measured by means of a gelation timer. Some effects of temperature, pH, crosslinking agent, and gelatin concentration have been measured. The crosslinking agents have varied from fast‐acting chrome alum, glutaraldehyde, and a carbodi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of Aqueous Solutions of Hydriodic Acid from Electromotive Force Measurements of Hydrogen-Silver Iodide CellsHannah B. Hetzer, R. A. Robinson, and Roger G. BatesCite this: J. Phys. Chem. 1964, 68, 7, 1929–1933Publication Date (Print):July 1, 1964Publication His…
Abstract The thermal decomposition of the C 4 , C 6 , and C 8 polymethylene sulfones has been investigated at 275°C. under reduced pressure. The gaseous decomposition products, collected and identified by infrared and mass‐spectrometer analysis, were found to consist primarily of sulfur dioxide, olefins, alkanes, wate…
Electron beams of approximately 2 kW power and acceleration voltages in the range about 100 kV are focused on metal surfaces in spots of 15 to 250 μ so that maximum power densities of more than 1013 W/m2 can be achieved. Such electrons penetrate several orders of magnitude deeper into the solid or liquid materials tha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDithiolium Derivatives. I. 2-Dialkylamino-1,3-dithiolium Perchlorates1E. Campaigne and N. W. JacobsenCite this: J. Org. Chem. 1964, 29, 7, 1703–1708Publication Date (Print):July 1, 1964Publication History Published online1 May 2002Published inissue 1 July 1964https://pubs.ac…
Volatile inhibitor usage is a relatively recent development in the protection of metals against corrosion. The method of application consists in saturating the metal's storage space with vapors of an appropriate chemical compound, which forms a protective layer by adsorption on the metal surface. In this investigation…
Abstract As discussed in Part I it was generally believed that during the sulfur vulcanization of rubber, important vulcanization intermediates are formed as a result of reactions between components of the various curing systems, e.g., sulfur, accelerator, zinc oxide and elastomer. A variety of reaction products have…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTViscosity and Glass-Transition Behavior of Polymer—Diluent Systems1L. J. Garfield and S. E. PetrieCite this: J. Phys. Chem. 1964, 68, 7, 1750–1754Publication Date (Print):July 1, 1964Publication History Published online1 May 2002Published inissue 1 July 1964https://pubs.acs.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransformations of Eburicoic Acid. V.1 Cleavage of Ring A by the Fungus Glomerella fusarioidesAllen I. Laskin, Paul Grabowich, Carol De Lisle Meyers, and Josef FriedCite this: J. Med. Chem. 1964, 7, 4, 406–409Publication Date (Print):July 1, 1964Publication History Published…
The application of polymers to wool is considered from the point of view of the surface free energies of wool and the polymers. A theory is developed explaining the effectiveness of different polymers in reducing felting shrinkage as heing due to the ease with which spreading can occur over the surface of the wool fib…
Glide dislocation configurations in zone-melted single crystals of molybdenum, deformed in tension at temperatures in the range 4·2–300·K, have been examined by thin film electron transmission microscopy. A majority of the crystals were oriented for single slip on the (011) [111] system, and were sliced and thinned pa…
The effect of an ``insulating sheath'' in reducing radiationless energy losses from a lanthanide chelate is postulated and techniques for developing this sheath are described. Data on luminescence of various europium chelates and synergic agent complexes are presented which demonstrate the efficacy of the sheath. A qu…
In vitro synthesis of collagen by established mouse fibroblast lines has been examined by electron microscopy. During rapid growth (log phase), when collagen could not be detected in the cultures, the cells lacked a well developed granular ergastoplasm and Golgi system. Upon cessation of growth (stationary phase), col…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Temperature on the Surface Tension and Density of Trifluoroacetic Acid.J. J. Jasper and H. L. WedlickCite this: J. Chem. Eng. Data 1964, 9, 3, 446–447Publication Date (Print):July 1, 1964Publication History Published online1 May 2002Published inissue 1 July 1964htt…
Abstract The relationship between biaxial stress‐rupture behavior and polymer morphology has been investigated for a series of compression‐molded disks of linear polyethylene. Rupture data were obtained over a range of temperatures on polymers of several melt indices that had been solidified at two rates. Two failure…