Additive manufacturing of methacrylated vinylogous urethane-based vitrimers
- Autores: Laura Ballester Bayarrí
- Directores de la Tesis: Robert Hernández Aguirresarobe (dir. tes.), Nicholas Ballard (codir. tes.)
- Lectura: En la Universidad del País Vasco - Euskal Herriko Unibertsitatea ( España ) en 2025
- Idioma: inglés
- Programa de doctorado: Programa de Doctorado en Química Aplicada y Materiales Poliméricos por la Universidad del País Vasco/Euskal Herriko Unibertsitatea
- Calificación: Sobresaliente Cum Laude
- Materias:
- Enlaces
- Tesis en acceso abierto en: ADDI
- Resumen
The search for alternatives to conventional polymers has led to the appearance of Covalent Adaptable Networks (CANs). The advantage of this type of materials is the combination of the benefits of thermoplastics and thermosets. In this work a methacrylated vinylogous urethane vitrimer, which follows an associative mechanism, is studied in the context of additive manufacturing. In a first place, the developed material was processed by vat photopolymerization, obtaining 3D objects with well resolution. On the other hand, the synthesis of vitrimer powder was carried out, obtaining polymer particles capable of being sintered in powder bed fusion (PBF) technique. For processing particles with this last technique, a laser set-up, which contains a laser, has been developed in order to study the coalescence of the material. In addition, the rheological behaviour of this novel material has been studied. For the 3D objects obtained in vat photopolymerization classical stress relaxation tests were carried out in order to determine the dynamic behaviour. In contrast, an exhaustive rheological study was carried out for the vitrimer powder particles, for studying the influence of the topological freeze transition (Tv) in the relaxation process of the network.
