Viora, L.; Combeau, M.; Pucci, M.F.; Perrin, D.; Liotier, P.-J.; Bouvard, J.-L.; Combeaud, C. A Comparative Study on Crystallisation for Virgin and Recycled Polyethylene Terephthalate (PET): Multiscale Effects on Physico-Mechanical Properties. Polymers 2023, 15, 4613. https://doi.org/10.3390/polym15234613
Viora, L.; Combeau, M.; Pucci, M.F.; Perrin, D.; Liotier, P.-J.; Bouvard, J.-L.; Combeaud, C. A Comparative Study on Crystallisation for Virgin and Recycled Polyethylene Terephthalate (PET): Multiscale Effects on Physico-Mechanical Properties. Polymers 2023, 15, 4613. https://doi.org/10.3390/polym15234613
Viora, L.; Combeau, M.; Pucci, M.F.; Perrin, D.; Liotier, P.-J.; Bouvard, J.-L.; Combeaud, C. A Comparative Study on Crystallisation for Virgin and Recycled Polyethylene Terephthalate (PET): Multiscale Effects on Physico-Mechanical Properties. Polymers 2023, 15, 4613. https://doi.org/10.3390/polym15234613
Viora, L.; Combeau, M.; Pucci, M.F.; Perrin, D.; Liotier, P.-J.; Bouvard, J.-L.; Combeaud, C. A Comparative Study on Crystallisation for Virgin and Recycled Polyethylene Terephthalate (PET): Multiscale Effects on Physico-Mechanical Properties. Polymers 2023, 15, 4613. https://doi.org/10.3390/polym15234613
Abstract
Polyethylene terephthalate (PET) is nowadays one of the most used polymers for packaging applications. Modifications induced by service conditions and the optimal mean to recycle this matter several times have to be perfectly understood to allow a reuse for similar application (from bottle to bottle for example). The present study aims to compare physico-chemical properties, crystalline organization, and mechanical behaviour of virgin (vPET) and recycled PET (rPET). Using different combined experimental methods (Calorimetry, Small Angle X-ray Scattering, Atomic Force Microscopy, DMA, and uni-axial tensile test), it has been proven that even if there is no change in the crystallinity of PET, the crystallisation process shows some differences (size and number of spherulites). The potential impact of these differences on local mechanical characterization, at the lamella scale, is explored and tends to demonstrate the development of homogeneous microstructure, leading to well-controlled and relevant local mechanical properties. This approach increases the understanding of crystallisation of PET and recycled PET during forming processes such as thermoforming or injection stretch blow moulding (ISBM) where elongation at break can depend on the microstructure conditioned by the crystallisation process.
Keywords
Recycled PET; Crystallinity; Thermal and mechanical properties
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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