Characterization of the Polylactic acid stretched uniaxial and annealed by Raman spectrometry and Differential scanning calorimetry

Type : Publication
Auteur(s) :  A. Bouamer, N. Benrekaa, A.Younes, H. Amar
Année :  2019
Domaine : Physique
Revue : IOP Conf. Series: Materials Science and Engineering
Résumé en PDF :  (résumé en pdf)
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Mots clés :  PLA, glass transition, Raman spectroscopy, DSC

Résumé : 

In this work, we have been interested in the characterization of the effect of heat treatment and mechanical treatment on the crystallinity of polylactic acid (PLA) film by two techniques, DSC and Raman spectroscopy. The results obtained by the DSC for the stretched film shows the appearance of a broad peak of crystallization around 120 °C, a rise in melting peak in a significant way, which shows that the uniaxial stretching has increased the crystallinity of the PLA, whereas for the annealed film appearance of a double melting peak. The result obtained by Raman spectroscopy shows new peaks appears at 922 cm−1 and 540 cm-1 after stretching and annealed process, indicating the crystallization process.