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Abstract A linear lattice model without adjustable parameters provides an accurate description of the magnitude and temperature dependence of the thermal conductivity of K c of polyethylene crystals parallel (∥) and perpendicular (⟂) to the chain direction. The model shows that heat is transported principally by phono…
The mechanism of the breakdown occurring when a dc ramp voltage is applied to low-density polyethylene (LDPE) and silane cross-linked PE at high temperatures is discussed, using experimental results on the Young's modulus Y , high-field conduction and pre-breakdown currents. The electric strength F B of PE was found t…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of the chemical state of palladium in PdNa-X zeolite by electron spin resonance and x-ray photoelectron spectroscopyM. Narayana, J. Michalik, S. Contarini, and Larry KevanCite this: J. Phys. Chem. 1985, 89, 18, 3895–3899Publication Date (Print):August 1, 1985Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAxial-equatorial isomerism in the complexes M(CO)4(L) (M = Fe, Ru, Os; L = Group 15 ligand). Crystal structures of ax-Ru(CO)4(AsPh3), ax-Ru(CO)4(SbMe3), and eq-Os(CO)4(SbPh3)Lillian R. Martin, Frederick W. B. Einstein, and Roland K. PomeroyCite this: Inorg. Chem. 1985, 24, 1…
Cross sections for elastic scattering and excitation of the n=2 states of atomic hydrogen by electrons are computed for incident energies in the range from 12 to 54 eV. The calculations are based primarily on an 11-state expansion including seven pseudostates. Pseudothresholds and pseudoresonances are suppressed by ap…
A rat liver DNA helix-destabilizing protein (HDP) that has previously been proposed to play a role in transcription has been identified as M chain lactate dehydrogenase (LDH-5; L-lactate:NAD+ oxidoreductase, EC 1.1.1.27). Tryptic peptides accounting for 157 amino acids in the rat liver HDP have been characterized and…
Abstract Plasma polymerizations in five silicon compounds having chemical formula of (CH 3 ) 3 SiXSi(CH 3 ) 3 , X = none, CH 2 , NH, O, and S atoms, were investigated by elemental analysis, infrared spectroscopy, and ESCA. The chemical composition of polymers plasma‐polymerized was influenced by the X groups in (CH…
The isothermal permeation of oxygen through was studied at 960°–1450°C and oxygen pressures of 10 −3 to 1 atm on one side of the permeation cell and of 10 −6 –10 −4 atm on the other. In the steady state, the permeating flux was directly proportional to , where varied from 2.5 to 4.0. The value of depended on the micro…
Abstract The composition of myofiber types varies within thigh muscles of chickens. The present study was designed to determine whether or not myofiber types were distributed uniformly across the diameter of the thigh muscles of chickens. Cross sections from middle portions of muscles were used histochemically to exam…
Abstract Residual oil was obtained by waterflooding, under water‐wet conditions, in unconsolidated packs of glass spheres at low capillary numbers. Trapped oil blobs were mobilized in a sequence of decreasing size with subsequent increases in capillary number. The larger blobs, which extend over many adjacent pores, f…
Abstract An ultrahigh‐molecular‐weight polyethylene material covering a range of crystallinity from 42 to 79% increased in calorimetric crystallinity as a result of chain scission following ionizing irradiation. Carbonyl was formed by a diffusion‐limited reaction of oxygen with long‐lived free radicals. Trans ‐vinylen…
Abstract X‐ray diffraction, differential scanning calorimetry and NMR have been used to give information on the molecular order and melting of tripalmitin and tristearin crystals. They also have been used to study the melting and solubility of these pure triglycerides when mixed with triolein. From these studies we pr…
Abstract Several series of thermotropic liquid‐crystalline polyesters, based on 4‐chlorocarbonyl phenyl esters of aromatic dicarboxylic acids ( 1–4 ) and phenols or aliphatic diols, were synthesized and studied by polarizing microscopy and differential scanning calorimetry (DSC). A relationship between geometry of mes…
Combining the quantum chemical valence effective Hamiltonian (VEH) technique and crystal packing methods, we have investigated the electronic properties and crystal structure of poly(perinaphthalene), PPN. The goal is to understand the origin of high conductivities observed for a pyrolysis product which contains PPN c…
Abstract Hexacyanobutadiene(HCBD) forms two kinds of molecular complexes with tetramethyltetrathiafulvalene(TMTTF) one kind with tetramethylthiotetrathiafulvalene(TTMTTF). The crystal structures of these complexes and neutral TTMTTF are determined by X-ray analyses. (TMTTF)2·HCBD is composed of 2:1 donor and acceptor,…
Liquid crystals as nonlinear optical materials are reviewed. Potential applications of these materials in wave mixing, phase conjugation, and optical bistability are discussed. The extremely large optical nonlinearity and the slow response time of these materials make them unique for studies of some highly nonlinear o…
Several unusual microstructural features, i.e., 90° tetragonal ZrO 2 twins containing antiphase domain boundaries, tetragonal ZrO 2 precipitates in a colony morphology, and precipitate‐free zones at the perimeter of cubic ZrO 2 grains containing fine tetragonal ZrO 2 precipitates, were observed in a single ZrO 2 ‐12 w…
Abstract A method is proposed to determine the number of nearest coordination spheres in which the presence of limiting short‐range order is sufficient to produce long‐range order. The use of the method is considered with reference to the example of atomic ordering in solid solutions with b.c.c. and f.c.c. structures.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallization kinetics of linear polyethylene at elevated pressuresH. T. Tseng and Paul J. PhillipsCite this: Macromolecules 1985, 18, 8, 1565–1571Publication Date (Print):August 1, 1985Publication History Published online1 May 2002Published inissue 1 August 1985https://pu…