Autor según el artículo: Guerrero, Federico; Ramis, Xavier; De la Flor, Silvia; Serra, Angels
Departamento: Enginyeria Mecànica
Autor/es de la URV: De la Flor Lopez, Silvia / Guerrero Ruiz, Federico / Serra Albet, Maria Angels
Palabras clave: Vitrimers Thiol Thermosets Renewable Poly(thiourethanes) Bio-based monomers Acid
Resumen: A series of poly(thiourethanes) (PTUs) from biobased monomers have been synthesized. Limonene and squalene were transformed into polyfunctional thiols by thiol-ene reaction with thioacetic acid and further saponification. They were then reacted in different proportions with hexamethylene diisocyanate (HDI) in the presence of a catalyst to prepare bio-based poly(thiourethane) vitrimer-like materials. The different functionalities of squalene and limonene thiols (six and two, respectively) allow for changing the characteristics of the final material by only varying their relative proportions in the reactive mixture. The proportions of thiol and isocyanate groups were stoichiometric in all the formulations tested. An acidic and a basic catalyst were tested in the preparation of the networked polymers. As the acidic catalyst, we selected dibutyltin dilaurate (DBTDL), and as the basic catalyst, a tetraphenylborate salt of 1,8-diazabicyclo(5.4.0)undec-7-ene (BGDBU), which has the advantage of only releasing the base at high temperatures. The materials obtained were characterized by thermogravimetry and thermomechanical analysis. The vitrimeric-like behavior was evaluated, and we could see that higher proportions of the limonene derivative in the formulations led to faster stress relaxation of the material. The use of the base catalyst led to a much shorter relaxation time. The materials obtained demonstrated good self-healing efficiency.
Áreas temáticas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: angels.serra@urv.cat federico.guerrero@estudiants.urv.cat federico.guerrero@estudiants.urv.cat silvia.delaflor@urv.cat
Identificador del autor: 0000-0003-1387-0358 0000-0001-7163-4068 0000-0001-7163-4068 0000-0002-6851-1371
Fecha de alta del registro: 2024-11-02
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://www.mdpi.com/2073-4360/15/6/1583
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Polymers. 15 (6): 1583-
Referencia de l'ítem segons les normes APA: Guerrero, Federico; Ramis, Xavier; De la Flor, Silvia; Serra, Angels (2023). Preparation and Characterization of a Series of Self-Healable Bio-Based Poly(thiourethane) Vitrimer-like Materials. Polymers, 15(6), 1583-. DOI: 10.3390/polym15061583
DOI del artículo: 10.3390/polym15061583
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2023
Tipo de publicación: Journal Publications