Zobrazeno 1 - 10
of 59
pro vyhledávání: '"D. C. DOUGLASS"'
Publikováno v:
Polymer. 35:3811-3815
N.m.r. analysis of the hydration and temperature behaviour of resolved carboxyl carbon resonances in the acid and neutralized α,ω-dicarboxylatopolybutadiene telechelics reveal a complex interaction between water and chain end groups participating i
Publikováno v:
Physical Review B. 47:12874-12889
We report the results of Stern-Gerlach-type magnetic deflection experiments on clusters of cobalt and gadolinium. Cobalt clusters exhibit superparamagnetic behavior over a broad range of temperatures, applied magnetic fields, and cluster sizes. We fi
Publikováno v:
Macromolecules. 26:1734-1739
NMR relaxation data for α,η1-dicarboxylatopolybutadiene (M n = 4600 and 1900), in the acid and Zr-neutralized forms, illustrate graphically the qualitative features of thermoreversible structural crosslink formation, due to end-group interactions a
Autor:
M. P. Andrews, Robert Tycko, Neil M. Zimmerman, D. C. Douglass, A. W. Cordes, Robert C. Haddon, K. M. Young, G. W. Trucks, P. Marsh, R. M. Fleming, R. T. Oakley, Joseph V. Waszczak, Thomas Palstra, Lynn Schneemeyer, S. H. Glarum
Publikováno v:
ChemInform. 22
Publikováno v:
Review of Scientific Instruments. 63:5667-5670
We report the construction and operation of a novel cluster source that produces clusters with well‐defined vibrational temperatures. Clusters seeded in He gas are thermalized in a cavity before undergoing a weak supersonic expansion. This weak exp
Publikováno v:
Zeitschrift f�r Physik D Atoms, Molecules and Clusters. 19:251-254
A new apparatus for measuring the magnetic properties of metal clusters has been constructed. The technique involves the conventional Stern-Gerlach deflection scheme together with modern pulsed laser vaporization source technology and time of flight
Publikováno v:
Macromolecules. 24:436-443
The effects of solvent extraction of increasing severity on carbon black filled natural rubber are examined. Collated NMR, DSC, and DMTA methods examine the glass transition and motional cooperation in the filled system. DSC is insensitive to the imm
Publikováno v:
Review of Scientific Instruments. 61:2374-2377
We have produced a pulsed supersonic expansion of helium with an effective pre‐expansion temperature below 100 K. This low initial gas temperature is achieved by cooling a pulsed gas valve and gas channel with liquid nitrogen. The resulting superso
Publikováno v:
The Journal of Physical Chemistry. 94:2014-2020
The nature and dynamics of Ru multicarbonyl sites (Ru(CO){sub x}) are studied through a series of {sup 13}C NMR experiments. Interpretation of the NMR spectra suggests two types of multicarbonyls: motionally averaged species that produce a narrow Lor
Publikováno v:
Zeitschrift f�r Physik D Atoms, Molecules and Clusters. 26:301-303
We use a variation of the Stern-Gerlach experiment to study the magnetic behavior of transition metal clusters. We report measurements of the magnetic properties of nickel clusters as a function of cluster size, vibrational temperature, and applied m