Materials Literature
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Abstract Hard‐segment model compounds containing one to five 4,4′‐methylene bis( p ‐phenylisocyanate) (MDI) units extended with 1,4‐butanediol (BD) were synthesized. The ends of the model compounds were reacted with ethanol. The melting point ( T m ) of the model compounds increased with the number of MDI units to an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDepression of glass transition temperature in aramid-polybutadiene multiblock copolymersTakashi Inoue, Shinichi Ogata, Masaaki Kakimoto, and Yoshio ImaiCite this: Macromolecules 1984, 17, 7, 1417–1419Publication Date (Print):July 1, 1984Publication History Published online1…
When a metal is deformed cold, a small fraction of the energy expended in its deformation is stored in the crystal lattice associated with crystal defects and their elastic strain fields. There is evidence that grains having different orientations store different amounts of strain energy, although the data available a…
Abstract Highly oriented polyacetylene was synthesized using nematic liquid crystals as polymerization solvent
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic resonance studies of hydrogen-reduced rhodium/titanium dioxide catalystsJ. C. Conesa, P. Malet, G. Munuera, J. Sanz, and J. SoriaCite this: J. Phys. Chem. 1984, 88, 14, 2986–2992Publication Date (Print):July 1, 1984Publication History Published online1 May 2002Publi…
Abstract Studies of the optical birefringence of solutions of acid‐soluble collagen from rat‐tail tendon at 22°C in the pH range 1.0–6.0 show that collagen exhibits an isotropic to mesophase transition only between pH 2.4 and 3.0 at 10% weight concentration. Such liquid crystalline order is probably essential for the…
A high contrast bright-field lattice imaging method in high resolution transmission electron microscopy and its application to the observation of microcrystalline domains in a partially decomposed amorphous Fe 84 B 16 alloy are described. A selection of an optimum defocus value was found to be necessary in obtaining d…
We report the results of a comprehensive x-ray-scattering study of multilayer ethylene physisorbed on graphite. At temperatures well below the triple point of bulk ethylene (103.8 K), adsorption only occurs up to a finite number of layers; any further addition of material results in the nucleation of bulk crystallites…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric relaxations and molecular motions in homopolymers and copolymers of vinylidene fluoride and trifluoroethyleneT. Furukawa, M. Ohuchi, A. Chiba, and M. DateCite this: Macromolecules 1984, 17, 7, 1384–1390Publication Date (Print):July 1, 1984Publication History Publi…
A 7Be transport test was performed in the Beryllium-7 Experimental Lithium Loop with hot leg at 270°C and cold leg at 230°C. The “cold leg” test stringer was in a rising temperature region at 250°C. A total of 108 test coupons were included in the material compatibility and deposition test programs, containing AISI Ty…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanism of oxidation of methyl ethyl ketone and cyclohexanone by potassium bis(tellurato)cuprate(III)Ganesh Prasad Panigrahi and A. C. PathyCite this: Inorg. Chem. 1984, 23, 14, 2133–2138Publication Date (Print):July 1, 1984Publication History Published online…
The general theory developed by the authors for the light propagation in cholesteric liquid crystals has been applied to the analysis of the high resolution reflectance spectra measured in a monodomain sample, in various optical conditions and in a wide wavelength range by Takezoe et al. The dispersion relation for th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal degradation of sodium dodecyl sulfateJohn M. Patterson, Zbigniew Kortylewicz, and Walter T. Smith Jr.Cite this: J. Agric. Food Chem. 1984, 32, 4, 782–784Publication Date (Print):July 1, 1984Publication History Published online1 May 2002Published inissue 1 July 1984ht…
Abstract The crystal structure of a new synthetic compound with the composition of TlInSiS4 has been determined. The crystal is orthorhombic, and the space group is Pbnm with Z=8. The cell dimensions are a=11.74(1), b=17.038(7), and c=7.285(3) Å. The structure was solved by the Patterson method and refined to a final…
Abstract Two‐layer films were produced by using the blown‐film coextrusion apparatus constructed in our laboratory. For this study, we have produced films of the following combinations: (1) LDPE/CXA 3095; (2) LDPE/Plexar 3; (3) LDPE/EMA; (4) nylon 6/LDPE; (5) nylon 6/CXA 3095; (6) nylon 6/Plexar 3; (7) nylon 6/EMA. Te…
Semiconductor valence-band edges are computed on absolute energy scales determined by Herman-Skillman and Hartree–Fock neutral atom ionization energies, respectively. These calculations use Harrison’s (1977) elementary theory of heterojunctions. Differences are compared with experimental heterojunction band discontinu…
Unidirectionally crystallized CaO‐P 2 O 5 glass‐ceramics were produced by reheating glass rods between 450° and 580°C (glass transition temperature ∼500°C) under a temperature gradient of 30°C/cm. These glass‐ceramics exhibit high bending strength (∼650MN/m 2 ) and toughness. Sample preparation is described and compar…
The collapse of a low density cloud of bubbles is studied using matched asymptotic expansions. Equations describing the motion and deformation of an individual bubble accounting for its interaction with the other bubbles in the cloud are derived. Numerical results for the case of a symmetrical cloud configuration show…
Performances and energy consumption of pilot-scale spiral wound and hollow fiber modules were compared. The feed was cottage cheese whey acidified to pH 3 and prefiltered. Exponential flux decay behavior was typical for both units. Flux was affected by pressure in the first 60 min of operation; for the spiral wound un…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparative photophysics of platinum(II) and platinum(IV) porphyrinsDongho Kim, Dewey Holten, Martin Gouterman, and Johann W. BuchlerCite this: J. Am. Chem. Soc. 1984, 106, 14, 4015–4017Publication Date (Print):July 1, 1984Publication History Published online1 May 2002Publis…