Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-consistent mean field theory of the microphases of diblock copolymersJ. D. Vavasour and M. D. WhitmoreCite this: Macromolecules 1992, 25, 20, 5477–5486Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September 1…
The effects of MnO 2 addition on k 31 and Q m were investigated for Pb(Zr 0.5 Ti 0.5 )O 3 (PZT). The MnO 2 addition increased Q m and k 31 in a low poling field. This result indicated that Mn-doped PZT possessed properties of `soft' and `hard' piezoelectrics simultaneously. Electron spin resonance measurement indicate…
A procedure has been developed to predict the stator iron loss of a brushless DC motor with due account of the operating condition of the drive system. Finite-element analysis is used to obtain a series of instantaneous magnetostatic field distributions within a motor, for which the instantaneous currents are derived…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpider silk: the unraveling of a mysteryRandolph V. LewisCite this: Acc. Chem. Res. 1992, 25, 9, 392–398Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September 1992https://pubs.acs.org/doi/10.1021/ar00021a002https…
Abstract Poly(2-iso-propyl-2-oxazoline) (PiPrOZO), prepared by cationic ring-opening polymerization of iPrOZO, has been found to be a thermo-sensitive polymer. PiPrOZO possesses a cloud point (CP) around 36 °C. The CP changed by the addition of sodium chloride or a surfactant. For utilizing these characteristics, a ne…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrelation of binary polyolefin phase behavior with statistical segment length asymmetryFrank S. Bates, Mark F. Schulz, Jeffrey H. Rosedale, and Kristoffer AlmdalCite this: Macromolecules 1992, 25, 20, 5547–5550Publication Date (Print):September 1, 1992Publication History P…
Diamond phase carbon films have been grown on silicon substrates at temperatures of less than 50 °C by using an organic solution. Substrates were negatively biased with sufficient dc potential to simulate ionized deposition conditions used in physical vapor deposition. The surface morphology, crystal structure, and so…
In this Rapid Communication, a novel simple monatomic liquid, possessing the distinctive icosahedral inherent local order, is reported. It has been generated by a special form of pair potential employed in a molecular dynamics system of 16 384 particles, and remained stable within a wide range of temperatures explored…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAzo polymers for reversible optical storage. 2. Poly[4'-[[2-(acryloyloxy)ethyl]ethylamino]-2-chloro-4-nitroazobenzene]A. Natansohn, S. Xie, and P. RochonCite this: Macromolecules 1992, 25, 20, 5531–5532Publication Date (Print):September 1, 1992Publication History Published o…
We present a general multiple-scattering (MS) scheme utilizing complex potentials for the calculation and interpretation of inner-shell x-ray-absorption fine structure for clusters of atoms in condensed matter with application to the case of the molecules ${\mathrm{SF}}_{6}$, ${\mathrm{GeCl}}_{4}$, and ${\mathrm{Br}}_…
A dynamic generalization of the Preisach hysteresis model is proposed, in which the rate of change of the flux associated with each elementary Preisach loops is not infinite, as in the standard Preisach model, but proportional to the difference between the external field and the loop threshold fields. With this assump…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChain-length dependence of electrochemical and electronic properties of neutral and oxidized soluble .alpha.,.alpha.-coupled thiophene oligomersJ. Guay, P. Kasai, A. Diaz, Ruilian Wu, James M. Tour, and Le H. DaoCite this: Chem. Mater. 1992, 4, 5, 1097–1105Publication Date (…
The liquid-glass transition dynamics of the molecular glass Salol has been studied by light-scattering spectroscopy from 383 to 198 K. Analysis of wide-frequency-range composite spectra revealed the relaxation dynamics from 0.2 GHz to 3.5 THz. A two-step relaxation process was observed near the crossover temperature $…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIs the molecular surface of polystyrene really glassy?Gregory F. Meyers, Benjamin M. DeKoven, and Jerry T. SeitzCite this: Langmuir 1992, 8, 9, 2330–2335Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September 1992…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOligothiophene cation radicals. .pi.-Dimers as alternatives to bipolarons in oxidized polythiophenesMichael G. Hill, Jean Francois Penneau, Baruch Zinger, Kent R. Mann, and Larry L. MillerCite this: Chem. Mater. 1992, 4, 5, 1106–1113Publication Date (Print):September 1, 1992…
Low-temperature electrical resistivity, specific heat, and magnetic measurements have been performed on the distorted perovskite ${\mathrm{LaNiO}}_{3}$. The electrical resistivity shows a linear temperature dependence at high temperatures and an ${\mathit{AT}}^{2}$ dependence below \ensuremath{\sim}50 K. The static pa…
Anaerobic uptake mechanisms of acetate, propionate and lactate by the sludge developed in an anaerobic aerobic biological phosphate removal process was investigated. Anaerobic batch experiments were conducted with these substrates, and mass balances of materials involved in substrate uptake metabolism were calculated.…
The selection rules for far-infrared and Raman transitions of a solid sphere are derived from group theory. By far-infrared only the spheroidal dipolar modes are excited, by Raman scattering the spherical and spheroidal quadrupolar modes are observed.
Infrared spectra of sodium and potassium alkaline-metal nitrates and magnesium and calcium alkali-earth nitrates in solid phase had been recorded in order to assign the fundamental bands. The influence of the dispersal médium (alkaline halide), employed in the solid sample preparation have been discussed. The quantita…
This text fits into the context of the attempt to emphasize the considerable importance of the factor of the construction materials in the subsection of low cost housing in Developing Countries in general and in Latín America in particular. The author tries to quantify, in a global manner, the repercussion of the mate…