Materials Literature
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Abstract The 15 N NMR spectra of five N ‐( o ‐aminophenyl)‐ N ′ substituted ureas and their hydrochloride salts were recorded in DMSO. N‐1 was more shielded in these ureas than in N ‐phenyl‐ N ′‐methylurea. The shifts of N‐3 varied with the substituents. Proton exchanges at N‐3 were observed when the spectra of the hy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure-property comparison of sulfonated and carboxylated telechelic ionomers based on polyisopreneL. N. Venkateshwaran, M. R. Tant, G. L. Wilkes, P. Charlier, and R. JeromeCite this: Macromolecules 1992, 25, 15, 3996–4001Publication Date (Print):July 1, 1992Publication H…
Abstract Polymers possess great significance in data storage technology. Taking as an example electrical and optical data storage, the state of development, properties required and opportunities for application of selected polymers are discussed, namely: (i) ferroelectric polymers with low switching voltages and extre…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic resonance studies of ammonia adsorption and decomposition on titania-supported vanadia catalystsMarjorie S. Went and Jeffrey A. ReimerCite this: J. Am. Chem. Soc. 1992, 114, 14, 5768–5775Publication Date (Print):July 1, 1992Publication History Published online1 May…
Abstract A peak‐to‐background ( P / B ) method was implemented for standardless analysis of bulk samples. Components of the model were selected from the literature on the basis of comparison with the present experimental results. Pouchou and Pichoir's characteristic x‐ray intensity calculations combined with Small et…
The properties of modified HDPE, selected from various polymer materials by evaluations of DC characteristics, were examined in both sheet and cable samples. It was found that the modification, which introduced a small amount of polar group into HDPE, considerably enhanced DC breakdown strength to as high as 1.5-2.0 t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman spectroscopic and thermoanalytical studies of the reaction of barium hydroxide with anatase and titanium oxide gelsPrabir K. Dutta, Patrick K. Gallagher, and Jen TwuCite this: Chem. Mater. 1992, 4, 4, 847–851Publication Date (Print):July 1, 1992Publication History Publ…
Abstract The photoluminescence (PL) spectra of the basic extended defects in Si are obtained. A new classification of the PL lines is proposed according to the squared edge components of the Burger's vectors of the dislocations which surround the structural defects. The different manifold splitting of the various disl…
Abstract Zirconium and titanium are regarded as sister metals with excellent resistance to many corrosives. While these metals exhibit some similar corrosion properties, this paper discusses several major differences. The differences are found in chloride‐free acids, acidic chloride solutions, salt solutions, alkaline…
X-ray microanalysis using an analytical electron microscope equipped with a cold field emission gun has been applied to the detection of the Suzuki segregation of solute atoms onto the stacking faults of extended dislocations in a Cu–Si alloy. Direct evidence for Suzuki segregation has been obtained.
In this study, an attempt was made to investigate the pitting and intergranular corrosion susceptibility of as-deposited and thermally aged weldments of type 316LN stainless steel (SS) made by shielded metallic arc (SMA) welding process using 316 SS filler wires having a carbon content of 0.059 wt%. The delta-ferrite…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanisms of thermal imidization studies by UV-visible and fluorescence spectroscopic techniquesPaul R. Dickinson and Chong Sook Paik SungCite this: Macromolecules 1992, 25, 14, 3758–3768Publication Date (Print):July 1, 1992Publication History Published online1…
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…