Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLayer Structures. 2. Influence of Spacers on Chain Packing and Phase Transitions of Poly(ester-imide)s Derived from N-(4-Carboxyphenyl)trimellitimideHans R. Kricheldorf, Gert Schwarz, Matthias Berghahn, Javier de Abajo, and Jose de la CampaCite this: Macromolecules 1994, 27,…
A new and unique processing method for fabricating stress-biased, monolithic ceramic elements for ultra-high displacement actuators is reported. The technique consists of chemically reducing one surface of a high lead containing piezoelectric or electrostrictive wafer such as PLZT with solid graphite in an oxidizing a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeuteration Effects and Solubility Parameter Ordering in Blends of Saturated Hydrocarbon PolymersWilliam W. Graessley, Ramanan Krishnamoorti, Nitash P. Balsara, Lewis J. Fetters, David J. Lohse, Donald N. Schulz, and Joseph A. SissanoCite this: Macromolecules 1994, 27, 9, 25…
We have studied the structural characteristics of the smectic phases formed by the main-chain type of polymers in which the mesogenic biphenyl moieties are linked by two different odd-numbered aliphatic spacers in a regularly alternate fashion. The first interesting result of this study is that the two different types…
Abstract Hydrotalcite (HT) interlayered with hexacyanoferrate(II) ions ([Mg 4.62 Al 1.52 (OH) 12 ][(Fe(CN) 6 ) 0 . 30 -(CO 3 ) 0.29 ]) has been synthesized from the carbonate-HT ([Mg 4.52 Al 1.50 (OH) 12 ][(CO 3 ) 0.77 ]) through double ion exchange reactions, and the products have been studied by chemical and physica…
From X-ray diffractometer single-crystal data, the structures of two binary n-alkane phases have been determined. (1) β-C 24 H 50 , C 26 H 54 , β-tetracosane-hexacosane, mole fraction of C 24 H 50 0.77, hence effective molecular weight 345. 39, space group Bb2 1 m (No. 36), a=4.992 (1), b=7.503 (3), c=67.448 (8) A, Z=…
Abstract The intercalation of poly(ethylene oxide), PEO, into homoionic phyllosilicates of the smectite group (montmorillonite and hectorite) gives composite materials able to act as solid polyelectrolytes. The synthesis and the structural characterization of new intercalation compounds belonging to this class of mate…
Site-directed mutagenesis was carried out to map the residues that form the two Zn(II) sites within a LIM domain. The C-terminal LIM domain derived from the cysteine-rich protein was utilized for this analysis and is referred to as LIM2. Seven cysteinyl residues and a single histidyl residue in the LIM2 sequence, CX2C…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoordination Geometries of Solvated Lanthanide(II) Ions: Molecular Structures of the Cationic Species [(DIME)3Ln]2+ (DIME = Diethylene Glycol Dimethyl Ether; Ln2+ = Sm, Yb), [(DIME)2Yb(CH3CN)2]2+, [(DIME)Yb(CH3CN)5]2+, and [C5H5N)5-Yb(CH3CN)2]2+James P. White III, Haibin Den…
The transparency of a film/substrate interface for thermal phonons was investigated for ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ thin films deposited on MgO, ${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$, ${\mathrm{LaAlO}}_{3}$, ${\mathrm{NdGaO}}_{3}$, and ${\mathrm{ZrO}}_{2}$ substrates. Both voltage respons…
Abstract— A new optical device whose reflection intensity can be electrically controlled at specific wavelengths has been demonstrated. This device has a liquid‐crystal/polymer multilayer structure formed by holography. The diffraction efficiency for Ar‐laser light is about 70%. The reflection intensity can be electri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature Dependence of Hysteresis and the Pore Size Distributions of Two Mesoporous AdsorbentsWilliam D. MachinCite this: Langmuir 1994, 10, 4, 1235–1240Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 April 1994https…
The polymerizations of alkyl esters of propiolic acid by Rh complex catalysts were investigated. [Rh(norbornadiene)Cl]2, which was the most active among the catalysts examined, gave rise to poly(alkyl propiolate) in a fairly high yield (∼80%) in the presence of alcohol as the polymerization solvent. The polymers forme…
The lyomesomorphic behaviour in apolar organic solvents of members of two series 1 and 2 of disc-shaped palladium organyls—the syntheses of four of them are new (1d, f and 2a, e) and are described here—each carrying twelve long lipophilic chains have been studied. Their lyomesomorphism appeared to be complex and has b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpatial Organization of Polymer Chains in a Crystallizable Diblock Copolymer of Polyethylene and PolystyreneR. E. Cohen, A. Bellare, and M. A. DrzewinskiCite this: Macromolecules 1994, 27, 8, 2321–2323Publication Date (Print):April 1, 1994Publication History Published online…
The enhancement of interfacial adhesion between immiscible amorphous polyamide and polystyrene (PS) by the addition of thin layers of styrene-maleic anhydride (SMA) random copolymer, used as a reactive compatibilizer, has been investigated. The asymmetric fracture test was employed to measure the fracture toughness of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModel Compounds for the Oxidized Uteroferrin-Phosphate Complex with Novel Dinucleating Ligands Containing Phenolate and Pyridine DonorsB. Krebs, K. Schepers, B. Bremer, G. Henkel, E. Althaus, W. Mueller-Warmuth, K. Griesar, and W. HaaseCite this: Inorg. Chem. 1994, 33, 9, 19…
Summary Tungsten and gold particles, coated with plasmid DNA harboring the β-glucuronidase (GUS) and neomycin phosphotransferase II (npt-II) genes, were delivered into tobacco primary leaves and suspension-cultured cells of maize using the helium particle inflow gun. Cell viability and particle localization were deter…
Abstract AerMet 100 alloy possesses a combination of high strength, hardness, toughness and good resistance to stress-corrosion from chlorides. It can be used for many aerospace applications such as landing gear and fasteners. This datasheet provides information on composition, physical properties, hardness, elasticit…
Abstract A novel π-donor, 1,2:5,6-bis(ethylenedithio)pyracylene (2), was prepared by dithioacetalization of 1,5-pyracenedione with 1,2-ethanedithiol followed by ring expansion on treatment with tellurium tetrachloride. 2 showed two reversible low oxidation potentials by cyclic voltammetry. Single crystal X-ray analysi…