X-ray diffraction of the crystallinity of glycolysates derived from PET |
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Authors: | Gaë l Colomines,Jean-Jacques Robin,Bernard Boutevin |
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Affiliation: | a Institut Charles Gerhardt de Montpellier, UMR 5253 CNRS/UM2/ENSCM/UM1, Equipe I.A.M./S.O.M., Place Eugène Bataillon, 34095 Montpellier Cedex 5, France b Institut Européen des Membranes, UMR 5635, Université de Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France |
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Abstract: | 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. |
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Keywords: | Glycolysis PET Recycling Crystallinity X-ray diffraction |
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