Materials Literature
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Wood fiber reinforced cement composites provide the highest performance‐to‐cost ratio among fibrous cement composites being considered for the replacement of asbestos cement. Fairly strong and stiff wood fibers are particularly suited for the reinforcement of thin‐sheet cement products. There is, however, concern rega…
In the presence of a fluorine mineralizer, highly aggregated, <5 μm α‐Al 2 O 3 platelet particles form by vapor transport during the thermal transformation of γ‐alumina. Platelet aggregation was determined to occur by platelet inter‐growth and by edge nucleation on primary α‐Al 2 0 3 platelets. The addition of 10 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComponent Dynamics in Miscible Blends of 1,4-Polyisoprene and 1,2-PolybutadieneJeffrey A. Zawada, Gerald G. Fuller, Ralph H. Colby, Lewis J. Fetters, and Jacques RooversCite this: Macromolecules 1994, 27, 23, 6861–6870Publication Date (Print):November 1, 1994Publication Hist…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPossible "Reentrant" Behavior in Magnetic Properties of TBA[Fe(tdas)2] ComplexKunio Awaga, Tsunehisa Okuno, Yusei Maruyama, Akiko Kobayashi, Hayao Kobayashi, Stephen Schenk, and Allan E. UnderhillCite this: Inorg. Chem. 1994, 33, 24, 5598–5600Publication Date (Print):Novembe…
The induced polarization and longitudinal strain behavior of lanthanum‐ and titanium‐modified antiferroelectric lead zirconate ceramics were measured as functions of electric field as high as 30 kV/mrn (300 kV/cm). Two field‐induced phase transitions were observed, both in polarization and strain. Polarization and str…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSiO2 as a Starting Material for the Synthesis of Pentacoordinate Silicon Complexes. 1K. Y. Blohowiak, D. R. Treadwell, B. L. Mueller, M. L. Hoppe, S. Jouppi, P. Kansal, K. W. Chew, C. L. S. Scotto, F. Babonneau, and Cite this: Chem. Mater. 1994, 6, 11, 2177–2192Publication D…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Chemical Characterization, and Bonding Analysis of the [Ag{Fe(CO)4}2]3-, [Ag4{.mu.2-Fe(CO)4}4]4-, and [Ag5{.mu.2-Fe(CO)4}2{.mu.3-Fe(CO)4}2]3- Cluster Anions. X-ray Structural Determination of[NMe3CH2Ph]4[Ag4Fe4(CO)16] and [NEt4]3[Ag5Fe4(CO)16]Vincenzo G. Albano, F…
The corrosion mechanism of copper at 373 and 300 K in the presence of submicron particle deposits has been investigated. Several in situ techniques have been used to monitor the corrosion process in real time. At and above the critical relative humidity of , dissolution of Cu is followed by formation of , oxidation of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Anionic Biosurfactant on Hexadecane Partitioning in Multiphase SystemsSreekala. Thangamani and Gina S. ShreveCite this: Environ. Sci. Technol. 1994, 28, 12, 1993–2000Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTActivation Barriers for Oxygen Diffusion in Polystyrene and Polycarbonate Glasses: Effects of Low Molecular Weight AdditivesYuanping Gao, Arthur M. Baca, Bojie Wang, and Peter R. OgilbyCite this: Macromolecules 1994, 27, 24, 7041–7048Publication Date (Print):November 1, 1994…
The connection between the Bremmer (reflection) series method and the R-matrix propagation method for modeling diffraction gratings is revealed. Both methods have been previously demonstrated to be immune from the problem of loss of significant digits caused by the growing and decaying exponential functions. It is mat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew Early Transition Metal Porphyrins: A New Route to Diorgano Complexes of Zirconium and Hafnium and the Preparation of Cationic DerivativesHolger Brand, Joseph A. Capriotti, and John ArnoldCite this: Organometallics 1994, 13, 11, 4469–4473Publication Date (Print):November…
Dielectric properties based on tautomerization in 9-hydroxyphenalenone derivatives were examined. While the 5-methyl derivative 2 exhibits an antiferroelectric transition at 41 K, such a phase transition was not observed in 5-bromo derivative 3 down to 4.2 K. Suppression of the phase transition in the latter may be in…
Strong interest has been generated in recent years regarding the modification of polyolefins to be functionalized or engineered for new materials with superior properties. Functional and engineered polyolefins are becoming more and more commercially important and expanding their applications as demonstrated by the sci…
Some velocity field results from the Surface Tension Driven Convection Experiment (STDCE) that was conducted aboard the USML-1 Spacelab in 1992 are reported. 10 cSt silicone oil was placed in an open circular container (10 cm wide×5 cm deep) and heated either by a cylindrical heater (1.11 cm diam) placed along the cen…
The design of narrow bandgap polymers remains a major challenge in the field of organic conductors. An alternative scheme is proposed for reducing the bandgap, namely the construction of a one‐dimensional graphitelike chain. Terthienyl frozen in a fully planar syn conformation is used as a simplified model compound fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of Polyelectrolyte Stars and Convex Polyelectrolyte BrushesSanjay Misra, Wayne L. Mattice, and Donald H. NapperCite this: Macromolecules 1994, 27, 24, 7090–7098Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue…
An EXAFS (extended x-ray-absorption fine structure) study of nanocrystalline iron prepared by high-energy ball milling is presented. Accurate data analysis has been performed using a recently developed ab initio multiple-scattering method (GNXAS). The crystalline iron EXAFS spectrum, taken as reference, has been analy…
Changes in pH, chloride (Cl–) concentration, and potential inside a rectangular crevice of metal against polymethyl methacrylate (PMMA) were monitored using microelectrodes as a function of time and externally applied potential. The environment inside the crevice was altered within the experimental time frame only whe…
The acoustic effects of free-running 2.12 μm Cr:Tm:Ho:YAG laser pulses delivered in water are studied. Laser pulses of 10 to 1200 mJ energy and 230 μs duration (full width at half-maximum) are used. Delivery fiber diameters of 200–600 μm are investigated. Combined fast flash video imaging and needle probe hydrophone p…