Study, by Raman Spectroscopy, of the microstructure evolution of isotactic polypropylene during tensile test and relaxation: Measuring the chains orientation

This paper presents the use of a Raman spectrometer coupled to a machine VideoTraction. For uniaxial tensile mechanical testing, Raman spectra are realized, that by using spectral signatures date back to the microstructure of the material: isotactic polypropylene. Here we are particularly interested in analyzing the orientation of the chains of the crystalline phase during the elastic recovery.