Semperger Orsolya Viktória, Suplicz András
Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, 1111, Hungary.
Production Division, Bay Zoltán Nonprofit Ltd. for Applied Research, Kondorfa utca 1, Budapest, 1116, Hungary.
Sci Rep. 2023 Oct 10;13(1):17130. doi: 10.1038/s41598-023-44314-0.
As the plastics industry continues to grow, the amount of plastic waste is also increasing. The European Union is controlling plastic waste through various regulations, focusing primarily on recyclability. A good alternative to traditional thermoset composites is thermoplastic polyamide 6 composites produced by Thermoplastic Resin Transfer Molding (T-RTM). Polyamide 6 has high strength and is produced by in-situ anionic ring-opening polymerization in T-RTM. Products made with this technology can replace traditional thermoset composites in many areas, which greatly increases recyclability. In this paper, the recyclability of the high molecular weight polyamide 6 matrix material of T-RTM composites is investigated. Products were mechanically recycled and then processed by injection molding. Thermal, mechanical and rheological properties of the samples were compared with the properties of the original product, as well as a general injection molding-grade PA6. Results show that the parts prepared with this innovative technology can be mechanically recycled and reprocessed by injection molding without a processing aid. After reprocessing, a significant reduction in properties is observed due to degradation, but the properties of the resulting product are in good agreement with those of a conventional commercially available injection molding grade PA6 material.
随着塑料工业的持续发展，塑料废弃物的数量也在增加。欧盟正在通过各种法规控制塑料废弃物，主要侧重于可回收性。热塑性树脂传递模塑（T-RTM）生产的热塑性聚酰胺6复合材料是传统热固性复合材料的良好替代品。聚酰胺6具有高强度，在T-RTM中通过原位阴离子开环聚合生产。用该技术制造的产品可以在许多领域替代传统热固性复合材料，这大大提高了可回收性。本文研究了T-RTM复合材料的高分子量聚酰胺6基体材料的可回收性。产品经过机械回收，然后通过注塑进行加工。将样品的热性能、机械性能和流变性能与原始产品以及普通注塑级PA6的性能进行了比较。结果表明，用这种创新技术制备的部件可以进行机械回收，并在无需加工助剂的情况下通过注塑进行再加工。再加工后，由于降解，性能显著降低，但所得产品的性能与传统市售注塑级PA6材料的性能吻合良好。
