Cusano Ilaria, Campagnolo Laura, Aurilia Marco, Costanzo Salvatore, Grizzuti Nino
Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy.
Gurit, 10088 Volpiano, Italy.
Materials (Basel). 2023 Apr 25;16(9):3358. doi: 10.3390/ma16093358.
Polyethylene terephthalate (PET) is a thermoplastic material that is widely used in many application fields, such as packaging, construction and household products. Due to the relevant contribution of PET to global yearly solid waste, the recycling of such material has become an important issue. Disposed PET does not maintain the mechanical properties of virgin material, as exposure to water and other substances can cause multiple chain scissions, with subsequent degradation of the viscoelastic properties. For this reason, chain extension is needed to improve the final properties of the recycled product. Chain extension is generally performed through reactive extrusion. As the latter involves structural modification and flow of PET molecules, rheology is a relevant asset for understanding the process and tailoring the mechanical properties of the final products. This paper briefly reviews relevant rheological studies associated with the recycling of polyethylene terephthalate through the reactive extrusion process.
聚对苯二甲酸乙二酯（PET）是一种热塑性材料，广泛应用于许多领域，如包装、建筑和家居用品。由于PET对全球年度固体废物有相关贡献，这种材料的回收利用已成为一个重要问题。废弃的PET无法保持原始材料的机械性能，因为接触水和其他物质会导致多次断链，随后粘弹性性能下降。因此，需要进行扩链以改善回收产品的最终性能。扩链通常通过反应挤出进行。由于反应挤出涉及PET分子的结构改性和流动，流变学对于理解该过程和调整最终产品的机械性能是一项重要资产。本文简要回顾了与通过反应挤出过程回收聚对苯二甲酸乙二酯相关的流变学研究。
