Materials Literature
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The 1:2 ordering in Ba(Ni 1/3 Nb 2/3 )O ceramics sintered at 1350‐1500°C has been investigated by using XRD and Raman spectroscopy. Both of the techniques show that the degree of the 1:2 ordering decreases as the sintering temperature increases. However, XRD discerns the 1:2 ordering only for the samples sintered at 1…
Well-defined poly(ethylene oxide) (PEO) with a cyano group at one end and a hydroxyl group at the other terminus was synthesized by the anionic ring opening polymerization of ethylene oxide (EO) initiated with (cyanomethyl)potassium (CMP) which was prepared by the metalation reaction of acetonitrile with potassium nap…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT29Si NMR Observation of an Amorphous Magnesium Silicate Formed during Impregnation of Silica with Mg(II) in Aqueous SolutionJean-Baptiste d'Espinose de la Caillerie, Maggy Kermarec, and Olivier ClauseCite this: J. Phys. Chem. 1995, 99, 47, 17273–17281Publication Date (Print)…
This comprehensive reference book covers properties, selection, processing, and applications of the most widely used nonmetallic engineering materials. The focus is on two main groups of materials: polymeric materials and ceramics and glasses. Compiled from the four-volume Engineered Materials Handbook series, this si…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConductivity Relaxation of 1-Methyl-2-pyrrolidone-Plasticized Polyaniline FilmHsun-Tsing Lee, Kuen-Ru Chuang, Show-An Chen, Pei-Kuen Wei, Jui-Hung Hsu, and Wunshain FannCite this: Macromolecules 1995, 28, 23, 7645–7652Publication Date (Print):November 1, 1995Publication Hist…
The accumulation of free lysine in tobacco seed triggers the stimulation of lysine-ketoglutarate reductase, an enzyme that acts in lysine catabolism. The mechanism of lysine-ketoglutarate reductase stimulation was studied in two different systems: (1) developing seeds of wild-type plants in which the low basal lysine-…
We describe a well-tolerated blood pool contrast agent with extended recirculatory half-life based on paramagnetic polymerized liposomes (PPLs). PPLs were constructed from a new type of polymerizable lipid molecule that has a derivative of gadopentetate dimeglumine as the hydrophilic head group and diacetylene groups…
In recent years aromatic polyether ketones have achieved a remarkable position among other thermoplastic polymers because of their unique combination of toughness, stiffness, thermooxidative stability, chemical and solvent resistance, electrical performance, flame retardancy, and retention of physical properties at hi…
The high strain rate behavior of two different tungsten-based composites (WBCs) has been investigated using a combination of compression Kolsky bar and high strain rate pressure—shear plate impact experiments. The two materials investigated are (a) a W/(WNiFe) “heavy alloy” containing 91 wt.% W with a WNiFe matrix…
Recent studies of amorphous solid materials have revealed the possibility that more than one distinct amorphous phase may be formed from the same substance. In analogy with the phenomenon of crystalline polymorphism, this behavior has been termed “amorphous polymorphism”. We review the experimental manifestation of am…
The liquid silicone RTV (room temperature vulcanizing) coating has gained considerable popularity since the first field trial in 1973 with an experimental product and the first large-scale application in 1987 with a commercial product. Although few problems have been encountered with the first generation coating, it b…
A polymer can be partially crystalline, such as polyethylene (PE), isotactic polypropene (it-pp), and poly (ethylene terephthalate) (PET), or noncrystalline, such as commercially available atactic poly (methyl methacrylate) (PMMA) and polystyrene (a-PS); partially crystalline polymers are customarily called crystallin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Structure of Cellulose II: A RevisitS. Raymond, Aa. Kvick, and H. ChanzyCite this: Macromolecules 1995, 28, 24, 8422–8425Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://pubs.acs.org/doi/10.10…
The influence of the distortion and the extra-carrier injection upon the first-order metal-insulator transition has been investigated in electron- and hole-doped series of ${\mathit{R}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathit{A}}_{\mathit{x}}$${\mathrm{NiO}}_{3}$ perovskites. The temperature-driven metal-insula…
Abstract The oxidative polymerization of o ‐phenylenediamine was studied under a variety of conditions. At room temperature the reaction of o ‐phenylenediamine with ammonium persulfate in HCl acid medium gives a dimer, 2,3‐diaminophenazine. The same reaction at 70°C results in a trimer with an open structure, [3‐amino…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControlling Intermolecular Interactions between Metallomesogens: Side-Chain Effects in Discotic Copper, Palladium, and Vanadyl Bis(.beta.-Diketonates)Hanxing Zheng, Chung K. Lai, and Timothy M. SwagerCite this: Chem. Mater. 1995, 7, 11, 2067–2077Publication Date (Print):Nove…
We carry out computer simulations of phase separation in diblock copolymer-homopolymer mixtures. The homopolymer chains are assumed to be compatible with one of the blocks of the copolymers whereas the two blocks of the copolymer chains are mutually incompatible. One of the characteristic features of this system is th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Proton Insertion and Characterization of the Proton Sites in Lithium Manganate SpinelsBrett Ammundsen, Deborah J. Jones, Jacques Roziere, and Gary R. BurnsCite this: Chem. Mater. 1995, 7, 11, 2151–2160Publication Date (Print):November 1, 1995Publication History…
A phenomenological model for predicting phase diagrams of a binary nematic mixture containing side chain liquid crystalline polymers and/or low molar mass liquid crystals has been proposed by combining Flory–Huggins free energy of isotropic mixing and Maier–Saupe free energy for nematic ordering of the nematogens. Two…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAtomic Shell Approximation: Electron Density Fitting Algorithm Restricting Coefficients to Positive ValuesPere Constans and Ramon CarboCite this: J. Chem. Inf. Comput. Sci. 1995, 35, 6, 1046–1053Publication Date (Print):November 1, 1995Publication History Published online1 M…