Study of the macromolecular dynamics as a function of stretching in bio-based polymers

The objective of this study is consequently to measure in situ the evolution of the macromolecular dynamics as a function of both stretching conditions and strain. To achieve this goal X-ray Photon Correlation Spectroscopy (XPCS) measurements will be carried out as this technique is one of the few allowing such in situ measurements of relaxation times from milliseconds to tens of seconds, i.e. in the timescale of the polymer macromolecular dynamics. Another objective of this work is to develop the XCPS measurement technique on the D2AM beamline (now possible due to the enhancement of the beam coherence thanks to the EBS upgrade).