X-ray diffraction of the crystallinity of glycolysates derived from PET

Gael Colomines (1) , Arie van Der Lee (2) , Jean Jacques Robin (1) , Bernard Boutevin (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 IEM - Institut Européen des membranes

Glycolysates coming from the chemical recycling of PET scraps are most often very crystalline compounds making them difficult to perform in further reactions like step growth polyaddition with diisocyanates to obtain polyurethanes. The glycolysis of PET was investigated using unusual reagents: polyesters based oligomers, bisphenol A, cycloaliphatic alcohol and aliphatic diols. The thermal properties of the glycolysates obtained were compared in terms of crystallinity with that of coming from the glycolysis with DEG. The crystallinity extents were calculated using X-ray diffraction. Surprisingly, the crystalline or non-crystalline nature of the reactants do not predict the morphology of the final glycolysates.

Mots clés: Glycolysis PET Recycling Crystallinity X-ray diffraction

Domaines: Polymères

Gael Colomines, Arie van Der Lee, Jean Jacques Robin, Bernard Boutevin. X-ray diffraction of the crystallinity of glycolysates derived from PET. European Polymer Journal, 2008, 44, pp.2874-2885. ⟨10.1016/j.eurpolymj.2008.07.008⟩. ⟨hal-00319656⟩