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Abstract Commercial polysulfone/polycarbonate (PSU/PC) polymer blends were reprocessed up to five times to determine the influence that reprocessing has on their structure and physical properties. All the high strain properties, mainly ductility, significantly decreased under harsh processing conditions, such as five…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA far-IR study of irradiated amorphous ice: an unreported oscillation between amorphous and crystalline phasesReggie L. Hudson and Marla H. MooreCite this: J. Phys. Chem. 1992, 96, 15, 6500–6504Publication Date (Print):July 1, 1992Publication History Published online1 May 20…
Benzophenone single crystals were grown by the Czochralski method. The dislocations introduced during the crystal growth were examined using X-ray topography. Double images of single dislocations were found on the topographs taken in some reflection planes. The Burgers vector of predominant grown-in dislocations was e…
Large serpentinite seamounts are common in the forearc regions between the trench axis and the active volcanic fronts of the Mariana and Izu-Bonin intraoceanic arcs. The seamounts apparently form both as mud volcanoes, composed of unconsolidated serpentine mud flows that have entrained metamorphosed ultramafic and maf…
We used a numerical minimization method to design a Rowland holographic spherical grating that is recorded with two stigmatic laser sources. The method aims at simultaneously reducing all aberrations up to fourth order over a significant spectral range. In the context of a high spectral resolution, far-ultraviolet spe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared spectra of germanium sulfide, germanium disulfide, germanium oxide sulfide and germanium dioxide in solid argonParviz Hassanzadeh and Lester AndrewsCite this: J. Phys. Chem. 1992, 96, 15, 6181–6185Publication Date (Print):July 1, 1992Publication History Published on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew Alkaloids from Haplophyllum tuberculatumMohammad A. Al-Yahya, Adnan J. Al-Rehaily, Mohammad S. Ahmad, Mansour S. Al-Said, Farouk S. El-Feraly, and Charles D. HuffordCite this: J. Nat. Prod. 1992, 55, 7, 899–903Publication Date (Print):July 1, 1992Publication History Publ…
Abstract The thermal oxidation, at 75–92°C, of antioxidant‐free low‐density polyethylene (LDPE) is faster in most aqueous environments than in air. The accelerative environments include water, solutions of sodium salts, and a basic buffer. However, an acidic buffer retards oxidation. Transition metal salts are not exa…
In the present study we describe an analysis of the interrelationship of several x-ray photoelectron spectroscopy (XPS) techniques recently employed to describe different types of carbon–carbon and carbon–hydrogen bonding. Several systems containing only these types of bonds (e.g., graphite and polyethylene) have also…
A new series of polyazomethines based on hydroxy-functionalized mesogenic units has been synthesized and characterized. Different structural variations have been checked in order to obtain mesogenic polyazomethines with low melting temperatures and a broad nematic range. Completely conjugated mesogenic units with a la…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox chemistry of meso-octaethylporphyrinogen: formation and opening of a cyclopropane ringJayne Jubb, Carlo Floriani, Angiola Chiesi-Villa, and Corrado RizzoliCite this: J. Am. Chem. Soc. 1992, 114, 16, 6571–6573Publication Date (Print):July 1, 1992Publication History Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiffusion-controlled reactions on porous silicas: mechanisms, surface diffusion coefficients, and effects of geometryJoshua Samuel, Michael Ottolenghi, and David AvnirCite this: J. Phys. Chem. 1992, 96, 15, 6398–6405Publication Date (Print):July 1, 1992Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular microstructure of the ethyl branch segments in poly(vinyl chloride)W. H. Starnes Jr., B. J. Wojciechowski, A. Velazquez, and G. M. BenediktCite this: Macromolecules 1992, 25, 14, 3638–3641Publication Date (Print):July 1, 1992Publication History Published online1 Ma…
Present methods of determining the safe injected charge levels for disk-type electrodes are given in terms of an average charge density, although the charge density is higher near the periphery of the electrode. This paper describes an electrode that produces an injected charge density that is uniform over the surface…
The {100} platelets of a type IaA/B diamond have been examined by spatially resolved electron-energy-loss spectroscopy. It is demonstrated unambiguously that nitrogen is present at these planar defects but in low concentrations. A quantitative analysis of the data reveals that the atomic density of the nitrogen is 0·2…
Reaction-sintered β-SiC specimens were neutron-irradiated in fast breeder reactors to fluences from 3.0×1024 to 1.7×1027 n/m2 (E>0.1 MeV) at temperatures from 370 to 620°C. Irradiation to fluences above 4.8×1026 n/m2 caused swelling (growth) that was significantly greater in respect of macroscopic dimension than of la…
Abstract— Single‐pitted specimens of an HSLA steel, were tested in laboratory air and in 1 M NaCl solution to study the influence of a corrosive environment on its fatigue life. The growth of fatigue cracks and the partitioning of the fatigue life into fatigue crack initiation and fatigue crack propagation were studie…
Oxygen diffusion induced phenomena in copper oxide thin films have been studied by a combination of the 16O(α, α)16O oxygen resonance technique and the transmission electron microscopy (TEM), which provides a method for studing the kinetics of nucleation and growth of the Cu2O phase in the CuO matrix. A discontinuous…
It was hypothesized that an orientated cellular tissue for incorporation into vital, functioning hybrid artificial organs can be prepared by periodically applying mechanical stresses on a hybrid tissue. Therefore, the effect of cyclic stretching on the two-dimensional (2-D) orientation response of arterial smooth musc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of carbon dioxide on the activation energy for methyl radical generation over lithium/magnesia catalystsMingting Xu, Chunlei Shi, Xuemin Yang, Michael P. Rosynek, and Jack H. LunsfordCite this: J. Phys. Chem. 1992, 96, 15, 6395–6398Publication Date (Print):July 1, 199…