DEVELOPMENTS IN TIME-RESOLVED SAXS/WAXS EXPERIMENTS

Wim Bras

DUBBLE CRG / ESRF, Netherlands Organisation for Scientific Research (NWO),c/o BP 220 F38043 Grenoble Cedex France

Keywords: SAXS, WAXS, Synchrotron Radiation, polymers

 

Combined time-resolved SAXS/WAXS experiments on high intensity synchrotron radiation beamlines have to be shown a useful tool in the study of phase transitions of non-crystalline samples which show ordering on different length scales. Recent instrumentation developments have allowed higher time-resolutions to be achieved and more complicated experiments to be performed in which the sample environment used to initiate the phase transitions allows better control [1,2,3]. In some cases additional techniques have been added which provide either thermodynamic or spectroscopic information besides the X-ray scattering data [4,5,6]. The advantage of performing these experiments on a single sample are obvious when one is dealing with experiments with a relatively high time resolution (<5 sec/frame) for which the combination of results from independent experiments generates problems with respect to the time correlation.

Results from experiments on polymer phase transitions, obtained on a second generation storage ring (SRS Daresbury) will be shown and the expected improvements possible when using a new ESRF beamline [3] and new detector technology [7] will be discussed.

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