Materials Literature
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Abstract Differential Scanning Calorimetry (DSC) is a popular method for the characterization of the cure kinetics of thermosetting materials. The experiments may be carried out under isothermal or temperature program modes. Several authors have pointed out the fact that the kinetic rate expressions for non‐isothermal…
Abstract A simple model of filler dispersion has been used to approximate particle spacing and the portion of rubber that is restricted as a result of particulate reinforcement. For N330 black, which has an equivalent radius of 20.2 nm, the critical concentration (in SBR of M w =344 000 ) for coherent carbon-gel forma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic exchange interactions in semiquinone complexes of iron. Structural and magnetic properties of tris(3,5-di-tert-butylsemiquinonato)iron(III) and tetrakis(3,5-di-tert-butylsemiquinonato)tetrakis(3,5-di-tert-butylcatecholato)tetrairon(III)Steven R. Boone, Gordon H. Pur…
Magnetic and magnetoelectric measurements were made on a single crystal of ferroelectric PbFe0.5Nb0.5O3. It was revealed that PbFe0.5Nb0.5O3 has a weak ferromagnetic moment and linear magnetoelectric effect below a transition point T m c of approximately 9 K. The magnetic class below and above T m c was determined to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and proton NMR studies of the electronic and magnetic properties of low-spin ferric isocyanide tetraphenylporphyrin complexesG. Simonneaux, F. Hindre, and M. Le PlouzennecCite this: Inorg. Chem. 1989, 28, 5, 823–825Publication Date (Print):March 1, 1989Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemical rearrangements of stable silenesKim M. Baines, A. G. Brook, R. R. Ford, P. D. Lickiss, A. K. Saxena, W. J. Chatterton, J. F. Sawyer, and B. A. BehnamCite this: Organometallics 1989, 8, 3, 693–709Publication Date (Print):March 1, 1989Publication History Publishe…
ABSTRACT We studied the hypothesis that diatom immigration abilities are related to their fitness for colonizing stream substrates. Diatom abundances on artificial substrates exposed for 24 h (the measure of immigration rate) and abundances of stream plankton were determined in six habitats. Diatom immigration varied…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of the 2:1 charge-transfer salt of decamethylferrocene and perfluoro-7,7,8,8-tetracyano-p-quinodimethane: [[Fe(C5Me5)2]+.cntdot.]2[TCNQF4]2-. The electronic structure of [TCNQF4]n (n = 0, 1-, 2-)David A. Dixon, Joseph C. Calabrese, and Joel S.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn analysis of phase separation kinetics of model polyurethanesHan Sup Lee and Shaw Lind HsuCite this: Macromolecules 1989, 22, 3, 1100–1105Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 March 1989https://pubs.acs.org/…
Abstract The effect of molecular weight distribution on the Theological and mechanical properties of a series of polypropylenes is evaluated. The polypropylenes tested were produced by controlled chemical degradation in a single‐screw plasticating extruder. Measured properties include shear, extensional and intrinsic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLight scattering and heterogeneities in low-loss poly(methyl methacrylate) glassesYasuhiro Koike, Norihisa Tanio, and Yasuji OhtsukaCite this: Macromolecules 1989, 22, 3, 1367–1373Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of cadmium selenide molecular clusters in zeolite Y: EXAFS and x-ray diffraction studiesKarin Moller, Mike M. Eddy, Galen D. Stucky, Norman Herron, and Thomas BeinCite this: J. Am. Chem. Soc. 1989, 111, 7, 2564–2571Publication Date (Print):March 1, 1989Publicat…
SUMMARY The reaction of copper and zinc were studied by adding the metal nitrate to a 4g:50ml suspension of calcite and water which had been equilibrated for two days, and then equilibrating for a further three days. Zinc behaved in a similar manner to cadmium in forming a surface‐solid solution of Zn χ Ca 1‐χ CO 3 as…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFive-coordinate complexes of 21-thiaporphyrin. Preparations, spectra, and structures of iron(II), nickel(II), and copper(II) complexesLechoslaw Latos-Grazynski, Jerzy Lisowski, Marilyn M. Olmstead, and Alan L. BalchCite this: Inorg. Chem. 1989, 28, 6, 1183–1188Publication Da…
Abstract The passivation of nickel has been studied in 1 M NaOH and 0.5 M H 2 SO 4 by XPS. An electrochemical specimen preparation and transfer to an ultra‐high vacuum, without contact with oxygen, permits a detailed examination of the oxide growth with potential and time resolution. Quantitative evaluation of the dat…
A computer model for predicting the distribution of steep-fronted surges in the line-end coils of machine windings is described. The model uses certain aspects of previous models combined to achieve simplification of solution while retaining accuracy. The solution technique is based on multiconductor transmission line…
The advent of laser Raman microprobe (LRM) instruments has permitted researchers to analyze minute (≥ 1 μm) phases in situ in their rock matrix. Geologists prefer to study such samples in polished thin-sections (in which a rock wafer is fixed with a mounting medium onto a glass slide and thinned to 30 μm thickness) or…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence studies of the conformational changes of poly(methacrylic acid) with pHA. F. Olea and J. K. ThomasCite this: Macromolecules 1989, 22, 3, 1165–1169Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 March 1989ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and reactivity of a monomeric pentamethylcyclopentadienyliridium(III) imido complexDavid S. Glueck, Frederick J. Hollander, and Robert G. BergmanCite this: J. Am. Chem. Soc. 1989, 111, 7, 2719–2721Publication Date (Print):March 1, 1989Publication Histor…
The genus Sellaphora Mereschkowsky is resurrected to include those naviculoid diatoms with an H-shaped plastid containing an invaginated pyrenoid; a particular, characteristic series of conformational and positional changes in the plastid and nucleus during the cell cycle; gametangia that produce one gamete apiece and…