Now showing items 41-50 of 60
Polymer-layered silicate nanocomposites: Synthesis, properties and applications
(John Wiley & Sons, Ltd., 1998-10)
Polymer nanocomposites, especially polymer-layered silicate (PLS) nanocomposites, represent a radical alternative to conventionally (macroscopically) filled polymers. Because of their nanometer-size dispersion, the ...
Chemical vapor deposition of tungsten oxide
(John Wiley & Sons, Ltd., 1998-03)
Crystalline and amorphous thin films of tungsten(VI) oxide can be prepared by chemical vapor deposition using a variety of volatile precursors below 500 °C. Deposition parameters for preparation of WO 3 films from tungsten ...
Synthesis of poly(vinyl alcohol) / silica gel polymer hybrids by in-situ hydrolysis method
(John Wiley & Sons, Ltd., 1998-10)
Homogeneous poly(vinyl alcohol) (PVA)–silica gel polymer hybrids were prepared by in-situ hydrolysis of poly(vinyl acetate) (PVAc) in a sol–gel reaction mixture with tetramethoxysilane (TMOS). The degree of hydrolysis was ...
Role of water in formic acid decomposition
(Wiley Subscription Services, Inc., A Wiley Company, 1998-02)
Formic acid decomposes primarily to CO and H 2 O in the gas phase, but to CO 2 and H 2 in the aqueous phase. Ab-initio quantum chemical calculations were performed, using Hartree-Fock and density functional methods, to ...
Report On ‘Water Chemistry: Using Field and Laboratory Experiences to Teach Scientific-Thinking Skills’
(Springer-Verlag; Springer-Verlag New York, Inc., 1998-02)
The workshop participants were led through the water chemistry laboratory by Susan Kegley. The format of the workshop was in the form of a site visit to a local housing project to study the water quality. Workshop participants ...
Rearrangements versus ligand exchange reactions of organocobalt polymer having cobaltacyclopentadiene moieties in the main chain Part of the work presented here was communicated in Ref. 1: Macromolecules , 27 , 7009 (1994).
(John Wiley & Sons, Ltd., 1998-10)
The rearrangement reaction of an organocobalt polymer with cobaltacyclopentadiene moieties in the main chain ( 1 ) was carried out to yield anew polymer bearing (η 5 -cyclopentadienyl) (η 4 -cyclobutadiene)cobalt moieties ...
Surface science and stability of networks prepared from hydroxy-terminated polydimethylsiloxane and methyltriethoxysilane
(John Wiley & Sons, Ltd., 1998-10)
Polydimethylsiloxane (PDMS) hybrid networks have been prepared by the reaction of PDMS(OH) 2 , average molecular weight 26 14× 1410 3 , 43.6 14× 1410 3 and 58 14× 1410 3 , and methyltriethoxysilane (MeTEOS, 10–60 wt%) ...
Low-blank digestion of geological samples for platinum-group element analysis using a modified Carius Tube design
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-05)
We have developed a modified Carius Tube design that permits the low-blank digestion of geological samples prior to platinum-group element analysis. The new Carius Tubes incorporate a liner of high-purity quartz glass that ...
Microstructure of a Pd/ceria–zirconia catalyst after high-temperature aging
(Kluwer Academic Publishers-Plenum Publishers; Kluwer Academic Publishers ; Springer Science+Business Media, 1998-03)
A model automotive exhaust catalyst, consisting of 2.25 wt% Pd supported on initially high-surface-area (88 m 2 /g) cerium–zirconium mixed oxide (Ce 0.5 Zr 0.5 O 2 ), was studied by X-ray diffraction (XRD), thermogravimetric ...
Report On ‘Chemistry in a Biological Context’
(Springer-Verlag; Springer-Verlag New York, Inc., 1998-02)
The American Chemical Society has started its first large-scale project related to opening up new options for undergraduate majors. Tentatively titled ‘Chemistry in a Biological Context,’ the work has only just begun. ...