Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The time dependence of relaxation for many substances near their glass transition region is often found accurately to obey a ``stretched exponential'' form, exp[-(t/\ensuremath{\tau}${)}^{\ensuremath{\alpha}}$], with the stretching exponent in the range 0<\ensuremath{\alpha}<1. It is the objective of this paper…
Polyundecanamide (nylon 11) was synthesized with 99+% 15N labeling of the amide nitrogen. Polymer samples were thermally treated to give the stable triclinic a crystal form and the metastable 6"' smectic form. The y form was obtained by precipitation from neat trifluoroacetic acid upon evaporation. 15N CP/MAS NMR clea…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of zwitterionic silicone sulfobetaine surfactantsSteven A. Snow, William N. Fenton, and Michael J. OwenCite this: Langmuir 1990, 6, 2, 385–391Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published iniss…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTwo-electron oxidation of cobalt phthalocyanines by thionyl chloride. Implications for lithium/thionyl chloride batteriesP. A. Bernstein and A. B. P. LeverCite this: Inorg. Chem. 1990, 29, 4, 608–616Publication Date (Print):February 1, 1990Publication History Published onlin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of annealing on the structure formation in a thermotropic liquid crystalline copolyesterAkira Kaito, M. Kyotani, and K. NakayamaCite this: Macromolecules 1990, 23, 4, 1035–1040Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Publ…
Experiments by Huppert (1982) have demonstrated that a finite volume of fluid placed on an inclined plane will elongate into a thin sheet of fluid as it slides down the plane. If the fluid is initially placed uniformly across the plane, the sheet retains its two-dimensionality for some time, but when it has become suf…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrossover behavior in high-frequency dielectric relaxation of linear polyions in dilute and semidilute solutionsKohzo Ito, Akira Yagi, Norio Ookubo, and Reinosuke HayakawaCite this: Macromolecules 1990, 23, 3, 857–862Publication Date (Print):February 1, 1990Publication Histo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElastic anomaly near the critical point of volume phase transition in polymer gelsShunsuke HirotsuCite this: Macromolecules 1990, 23, 3, 903–905Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published inissue 1 February 1990https://pub…
Abstract Internally pressurized crosslinked polyethylene (XLPE) pipes fail according to one of the three following mechanisms: (a) stage I fracture occurs at the highest stresses and is ductile when large defects are absent; (b) stage II fracture is brittle and occurs at intermediate stress levels; (c) stage III fract…
The longitudinal and transverse speeds of sound of ice Ih, II, III, V, and VI have been measured by Brillouin spectroscopy in the range 0–10 kbar at −35.5 °C. The bulk adiabatic moduli derived from these measurements are 138.9, 98.7, 141.9, and 181.4 kbar for ice II, III, V, and VI, respectively, at pressures of 2.83,…
Rotational moulding has been available as a processing method for plastics for about 30 years. However, it is only within the last decade that substantial developments have started to take place so that the process can now be competitive with injection moulding and blow moulding for the production of complex shapes. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, electrochemistry, and spectroscopic and magnetic properties of new mononuclear and binuclear complexes of vanadium(III), -(IV, and -(V) containing the tridentate macrocycle 1,4,7-trimethyl-1,4,7-triazacyclononane (L). Crystal structures of [L2V2(acac)2(.mu.-O)]I2.…
The X-ray reflectivity of bent perfect crystals is calculated from a model where the crystal is approximated by a stack of perfect-crystal lamellae which have a gradually changing orientation. A computer program is developed for calculation of the reflectivity of the composite crystal from the dynamical theory of diff…
Refinement of triclinic lysozyme by restrained least squares against the 2 A resolution X-ray data is described, beginning with the model from cycle 17 of the preceding paper [Hodsdon, Brown, Sieker & Jensen (1990). Acta Cryst. B46, 54-62]. After 20 refinement cycles, R stood at 0.172. Nevertheless, serious errors inv…
A longitudinal double-blind study was conducted to determine the effect of sock fiber composition on the frequency and size of blistering events in long-distance runners. Thirty-five long-distance runners participated in this study. Two different socks were tested, which were identical in every aspect of construction…
Abstract A series of coin‐type lithium secondary batteries with polyaniline positive electrodes was developed and commercialized which might be not only the first practical polymer battery but also the first industrial application of conducting polymers. Performances of the commercialized batteries were described in d…
In situ transmission x‐ray absorption spectroscopy was used to investigate changes in the structure of as it was cycled as a nonsintered nickel oxide electrode in concentrated alkali. Results were obtained for dry as‐prepared electrodes and electrodes that were charged or discharged. Changes were observed in the (0001…
Abstract High-resolution transmission electron microscopy (HRTEM) and electron diffraction experiments have been performed on R1 and R> 1 illite/smectite (I/S) samples that from X-ray powder diffraction (XRD) experiments appear to contain well-ordered layer sequences. The HRTEM images confirmed earlier computer ima…
In this study, a detailed survey has been made of 200 silicon carbide crystals grown by the modified Lely technique. All 200 crystals were examined using, at minimum, the combination of X-ray oscillation photography and one synchrotron topograph. This has now produced a reliable and unique database on polytypism, one-…
We present a novel subpicosecond optical transient-reflection method, which employs the surface-plasmon resonance of a thin silver film as a very sensitive probe to study small transients of the effective electron and lattice temperature. By measuring under surface-plasmon resonant and nonresonant conditions, we can d…