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Volume 1 – Issue 1 – 2021

Original Research Article

Structural Analysis Raman Spectroscopy Of Polypropylene Oriented By Traction

Laarej Merad1*, Mama Bouchaour1, Marc Jean Meddard Abadie2

1University of Tlemcen, Faculty of Sciences, Department of Physics, Unité de Recherche « Matériaux et Energies Renouvelables », URMER, BP: 119, Fg. Pasteur, Tlemcen, 13000, (ALGERIA)
2Institute Charles Gerhardt Montpellier Aggregates, Interfaces & Materials for Energy (ICGM, UMR CNRS 5253), University of Montpellier, 34095 Montpellier Cedex 5, (FRANCE)


PAGE NO: 25-31


Raman spectroscopy offers a highly selective technique to probe unknown substances from a safe distance. Often, it is necessary to scan large areas of interest. The molecular orientation behavior of isotactic polypropylene (iPP) is investigated by using in situ Raman spectroscopy under tensile tests. Raman spectroscopy is a structural characterization technique that relies on inelastic scattering of monochromatic light, which is known as Raman scattering. The wave number position indicates the vibrational states in the material while the width describes the molecular structure. Also, the intensities can be compared in the polarized and perpendicular directions to determine the orientation of a material and to use polarized Raman spectra obtained at different sample orientations to define an axis of preferred orientation. Knowing what peaks change with molecular orientation can give some insight into what is happening on a molecular level. It is possible to study the process of molecular orientation by observing the transformations that take place in the Raman spectra as the molecular orientation change.