Reference : A high pressure cell for supercritical CO2 on-line chemical reactions studied with x-...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
A high pressure cell for supercritical CO2 on-line chemical reactions studied with x-ray techniques
Hermida-Merino, Daniel []
Portale, Giuseppe []
Fields, Peter []
Wilson, Richard []
Basset, Simon []
Jennings, James []
Dellar, Martin []
Gommes, Cédric mailto [Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée >]
Howdle, Steven []
Bras, Wim []
Vrolijk, Benno []
Review of Scientific Instruments
American Institute of Physics
Yes (verified by ORBi)
New York
[en] SAXS ; High-pressure ; supercritical CO2 ; synchrotron
[en] A versatile high pressure X-ray sample cell has been developed for conducting in situ time-resolved X-ray scattering experiments in the pressure and temperature regime required (pressures up to 210 bars and temperatures up to 120 °C) for chemical reactions in supercritical fluids. The large exit opening angle of the cell allows simultaneous performance of SAXS-WAXS experiments. Diamond windows are used in order to benefit from the combination of maximum strength, minimal X-ray absorption and chemical inertia. The sample cell can also be utilised for X-ray spectroscopy experiments over a wide range of photon energies. Results of the online synthesis of a block copolymer, poly(methyl methacrylate-block-poly(benzyl methacrylate), by Reversible Addition-Fragmentation Chain Transfer (RAFT) in a supercritical CO2 dispersion polymerisation will be discussed. The contribution of the density fluctuations, as function of temperature, to the X-ray scattering signal has been quantified in order to allow appropriate background subtractions
Researchers ; Professionals

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