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A study has been made of the influence of transesterification on the miscibility in binary blends of poly(ethylene terephthalate) and poly(bisphenol-A carbonate). The blends were melt mixed in the range 260–300°C and studied by differential scanning calorimetry, dynamic mechanic analysis, and by Fourier transform infr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA family of mononuclear manganese(IV) complexes: an MnIVO4N2 sphere assembled via phenolate-imine-carboxylate coordinationSwapan Kumar Chandra, Partha Basu, Debashis Ray, Samudranil Pal, and Animesh ChakravortyCite this: Inorg. Chem. 1990, 29, 13, 2423–2428Publication Date (…
Abstract In the presence of metallic bismuth, bismuth(III) chloride–metallic zinc, or bismuth(III) chloride–metallic iron, allylic halides have been found to react with aldehydes under mild conditions to give the corresponding homoallylic alcohols in high yields with high chemo-, regio-, and stereoselectivity. Allylic…
A realistic model structure of the ferrielectric phase is proposed by taking into account the apparent tilt angle measurements. On the basis of the model, the electric and optical responses are investigated in the ferrielectric SmC γ * as well as in the antiferroelectric SmC A * phases of MHPOBC (C 8 H 17 O- - -COO- -…
Volatile chalcogenolato complexes of cadmium with stertically demanding thio- and selenophenolato ligands can easily be prepared. In the solid state, the complexes 1 are dimeric with trigonal-planar coordinated cadmium, whereas in solution they dissociate to monomers. They sublime at high temperatures and can be used…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGeometry dependence of intramolecular photoinduced electron transfer in synthetic zinc-ferric hybrid diporphyrinsAtsuhiro Osuka, Kazuhiro Maruyama, Noboru Mataga, Tsuyoshi Asahi, Iwao Yamazaki, and Naoto TamaiCite this: J. Am. Chem. Soc. 1990, 112, 12, 4958–4959Publication D…
Diffusion of lithium ion and tritium in octalithium plumbate (Li s PbO 6 ) was studied. The electrical conductivity of the polycrystalline pellets measured by the two‐terminal ac method in the temperature range of 300 to 973 K was one of the highest among oxide lithium ceramics. The temperature dependence of the condu…
Abstract The frequencies of the wurtzite‐like modes due to Li–O and Ga–O bond vibrations in LiGaO 2 and of the rocksalt‐like mode due to Li–O bond vibrations in LiInO 2 are determined from the infrared reflectivity spectra of the compounds. The force constants for the Li–O and Ga–O bonds in LiGaO 2 follow the same tre…
AbstractThe development of microstructure and crystallographic texture in an AA 3004 alloy during fiat rolling at elevated temperature has been investigated. A significant feature of the microstructure was the presence of banding associated with inhomogeneous deformation. The planes defining this banding were often in…
Abstract Six deferrated clay (<2 µm) samples from the major B horizons of pedons derived from basaltic pyroclasts (Western Cameroon) were selected. These soil clays, which differ mainly in their contents of halloysite and kaolinite, represent the types of secondary constituents characteristic of different weatherin…
Abstract The dynamic bulk modulus of elasticity has been measured for 14 different rubbery elastomers: three natural rubbers, five neoprenes, three polyurethanes, and one each of butyl, nitrile, and butadiene types. The measurements ranged in temperature from −10 to +40°C, at frequencies from 5 to 3000 Hz, but mostly…
Abstract The crystalline structures of “microlayer” and “nanolayer” polyethylene have been examined in coextruded films comprised of alternating layers of high‐density polyethylene and polystyrene. Transmission electron microscopy (TEM), small‐angle x‐ray scattering (SAXS), and wide‐angle x‐ray scattering (WAXS) revea…
In the Y 2 O 3 –Al 2 O 3 –B 2 O 3 system, homogeneous glasses were obtained from compositions containing from 50 to 65 mol% B 2 O 3 . The density, refractive index, and thermal expansion increase as Y 2 O 3 replaces either B 2 O 3 or Al 2 O 3 . These glasses have a dilatometric softening temperature above 665°, and be…
Abstract Polymer blends have received particular interest in the past several decades in both industrial and academic research. An initial survey of miscible polymer pairs (1) (1968) revealed 12 combinations. A later survey (2) (1979) noted approximately 180 miscible pairs. Today possibly over 500 miscible combination…
Abstract Acrylic monomers with a cyclic carbonate function, their synthesis having been described previously, are used to synthesize copolymers with pendent cyclic carbonate side groups. Their chemical modification by ring opening addition reactions provides a convenient method for preparing functional polymers. The s…
(1990). STRUCTURE/PROPERTY RELATIONSHIPS IN TEXTILE FIBRES. Textile Progress: Vol. 20, No. 4, pp. 1-43.
Feather meal contains three sulfur amino acids: cystine, lanthionine, and methionine. Procedures were investigated to determine the best conditions for quantitating the sulfur amino acids in feather meal. To separate the sulfur amino acids by ion exchange chromatography, an elution system using 100 mM citrate buffer a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBase binding to zinc picket fence porphyrins. Attractive intramolecular interactions in organic solventsHiroyasu Imai and Eishin KyunoCite this: Inorg. Chem. 1990, 29, 13, 2416–2422Publication Date (Print):June 1, 1990Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExtraction of polymer properties from oligomer calculationsC. X. Cui, Miklos. Kertesz, and Y. JiangCite this: J. Phys. Chem. 1990, 94, 12, 5172–5179Publication Date (Print):June 1, 1990Publication History Published online1 May 2002Published inissue 1 June 1990https://pubs.ac…
The tris (methylammonium) nonaiododiantimonate (III) crystals were grown. The preliminary X-ray diffraction studies showed that at room temperature they are isomorphous with Cs3Sb2I9. The crystals are hexagonal, space group P63/mmc with the unit cell parameters; a = 8.543 (1), c = 21.520 (7) å, Z = 2, V = 1360 Å3. The…