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Abstract Many measurements have been made of the strength of simple vulcanizates of common elastomers, both under steady and intermittently applied loads. In both cases, the strength is governed by dissipative processes, particularly those arising from internal molecular motions and from stress-induced crystallization…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and circular dichroic and photoresponsive properties of a graft copolymer containing an azoaromatic polypeptide branch and its membraneMasato Aoyama, Akira Youda, Jun Watanabe, and Shohei InoueCite this: Macromolecules 1990, 23, 5, 1458–1463Publication Date (Print)…
The energy of formation of salt linkages between Arg or Lys with Asp or Glu in a polypeptide chain having the collagen fold have been estimated using the fully empirical energy minimization scheme AMBER. The polypeptide was considered both in an isolated and a hydrated triple helical state. The collagen fold associate…
Selection rules are derived for delimiting boundaries in the structural unit model of high-angle grain boundary structure. The rules arise from the condition that the structural units fit compatibly together in the boundary plane. Rules are given for pure twist, pure tilt and mixed tilt and twist trajectories in the f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic states of chrysene: linear and magnetic circular dichroism and quantum chemical calculationsJens. Spanget-Larsen, Jacek. Waluk, and Erik W. ThulstrupCite this: J. Phys. Chem. 1990, 94, 5, 1800–1806Publication Date (Print):March 1, 1990Publication History Published…
Outgassing characteristics of an electropolished stainless steel (304) pipe wall were investigated by an isolation method. The free outgassing rate after an in situ bakeout (150 °C, 20 h) was estimated as low as 1.6×10−12 Pa ℓ s−1cm−2. After the in situ bakeout, H2 molecules were steadily evolved from the pipe wall, w…
Polymer films containing nematic liquid crystal microdroplets are useful for light modulation devices. Light scattering in these films is controlled by applied electric fields. These films were produced by cooling solutions of polymer in the isotropic phase of liquid crystal to temperatures below the clearing point (t…
Problem 12 of the TEAM (Testing Electromagnetic Analysis Methods) Workshops for Eddy Current Code Comparison is a cantilever beam in crossed steady and time‐varying magnetic fields. A total of six solutions to this coupled problem are described and compared with experimental results. Most solutions treated the electro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganosiloxyphosphazene polymers: synthesis via aminosiloxane reagentsHarry R. Allcock and William D. CoggioCite this: Macromolecules 1990, 23, 6, 1626–1635Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue 1 March 1990https…
Zirconia‐toughened alumina (Al 2 O 3 –15 vol% Y‐PSZ (3 mol% Y 2 O 3 )) reinforced with 10 vol% silicon carbide whiskers (ZTA‐10SiC w ) ceramic matrix composite has been characterized with respect to its room‐temperature mechanical properties, thermal shock resistance, and thermal stability at temperatures above 1073 K…
The three different force-calculating methods based on magnetic field analysis using the finite-element method are evaluated using a fundamental model, which is constructed with permanent magnets and iron plates. The magnetic force for the model is calculated by Maxwell's stress tensor method, the virtual work method,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalculation of the structure, vibrational spectra, and polarizability of boroxine, H3B3O3, a model for boroxol rings in vitreous B2O3J. A. Tossell and Paolo. LazzerettiCite this: J. Phys. Chem. 1990, 94, 5, 1723–1724Publication Date (Print):March 1, 1990Publication History P…
The continuing development of the textile and clothing manufacturing industries depends in no small measure on the successful implementation of reliable objective methods for the specification, prediction and control of fabric quality and performance attributes. In the last decade, we have seen several notable example…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new route to alkoxysilanes and alkoxysiloxanes of use for the preparation of ceramics by the sol-gel techniqueGeorge B. Goodwin and Malcolm E. KenneyCite this: Inorg. Chem. 1990, 29, 6, 1216–1220Publication Date (Print):March 1, 1990Publication History Published online1 Ma…
A methodology for predicting the catalytic metal profiles resulting from a multicomponent impregnation was developed. Each ingredient was classified on the basis of its influence on the adsorption process. A multicomponent adsorption-transport model was used to predict the effects of a competing acid on the catalytic…
The long time dynamical response of a nematic liquid exhibiting banded textures (inversion walls) during the twist Freedericksz transition is presented. A dynamical model of approach to equilibrium through defect interaction and the resulting dissolution of the banded textures is presented. A linear stability analysis…
The Raman spectra of a series of glasses in the system MoO 3 ‐P 2 O 5 and the polyerystalline compounds molybdenum metaphosphate (MoO 2 (P0 3 ) 2 ) and molybdenum pyrophosphate ((MoO 2 ) 2 P 2 O 2 ) are reported. The spectra indicate that traces of P=O and phosphate chains are present only in glasses having less than…
Synthesis and Structures of Bis(triethanolamine)lanthanide Complexes Three novel lanthanide triethanolamine chelates {Ln[N(CH 2 ‐CH 2 OH) 3 ] 2 }(CF 3 SO 3 ) 3 (Ln = Pr, 1 ; Yb, 2 ; Lu, 3 ) were synthesized from Ln(CF 3 SO 3 ) 3 and triethanolamine in THF. The structures of 1 and 2 were determined by single‐crystal X‐…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA second-order nonlinear optical poly(organophosphazene)Alexa A. Dembek, Chulhee Kim, Harry R. Allcock, Robert L. S. Devine, William H. Steier, and Charles W. SpanglerCite this: Chem. Mater. 1990, 2, 2, 97–99Publication Date (Print):March 1, 1990Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray diffraction and NMR studies of nylon 6/iodine/potassium iodide complexes and their transformation into the .gamma. crystalline phaseN. Sanjeeva Murthy, Galen R. Hatfield, and Jeffrey H. GlansCite this: Macromolecules 1990, 23, 5, 1342–1346Publication Date (Print):March…