Autor según el artículo: Gamardella F; De la Flor S; Ramis X; Serra A
Departamento: Enginyeria Mecànica Química Analítica i Química Orgànica
Autor/es de la URV: De la Flor Lopez, Silvia / Serra Albet, Maria Angels
Palabras clave: Vitrimers Transcarbamoylation Thiol Thermosets Thermoset Recyclability Recovery Polyurethane Polymer networks Poly(thiourethane) Facile Dynamic chemistry Covalent adapatable networks Access
Resumen: © 2020 Elsevier B.V. Networked poly(thiourethane) materials with Tgs around 130 °C, derived from two aliphatic isocyanates (isophorone diisocyanate, IPDI and 4,4′-methylene bis(cyclohexyl isocyanate), HMDI) and one aromatic diisocyanate (toluene-2,4-diisocyanate, TDI) have been prepared with the same trithiol as comonomer (trimethylol propane tris(3-mercaptopropionate), S3) in stoichiometric proportions in the presence of dibutyltin dilaurate (DBTDL) as the catalyst. The higher reactivity of TDI allowed the preparation of this material in absence of catalyst. The evolution of the curing process has been followed by FTIR. Thermomechanical studies have been performed to determine their viscoelastic properties and their vitrimeric behaviour. The materials were able to reach a complete relaxation stress state thanks to the exchange process of the thiourethane moiety. Among them, TDI derived material experimented the fastest relaxation. The materials were also characterized by thermogravimetry and tensile tests. The recycled materials obtained by grinding the original thermosets and hot-pressing the powder have been fully characterized by mechanical, thermomechanical and FTIR studies, which allowed to confirm their recyclability without appreciable changes in the network structure. The presence of DBTDL in the materials has been proved to be necessary to reach a good recyclability.
Áreas temáticas: Saúde coletiva Química Polymers and plastics Polymer science Medicina veterinaria Materials chemistry Materiais Interdisciplinar General chemistry General chemical engineering Farmacia Environmental chemistry Engineering, chemical Engenharias iii Engenharias ii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Chemistry, applied Chemistry (miscellaneous) Chemistry (all) Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Biodiversidade Biochemistry Astronomia / física
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 1381-5148
Direcció de correo del autor: silvia.delaflor@urv.cat angels.serra@urv.cat
Identificador del autor: 0000-0002-6851-1371 0000-0003-1387-0358
Fecha de alta del registro: 2023-02-19
Volumen de revista: 151
Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
Enlace a la fuente original: https://www.sciencedirect.com/science/article/abs/pii/S1381514820301966?via%3Dihub
URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Reactive & Functional Polymers. 151 (104574):
Referencia de l'ítem segons les normes APA: Gamardella F; De la Flor S; Ramis X; Serra A (2020). Recyclable poly(thiourethane) vitrimers with high Tg. Influence of the isocyanate structure. Reactive & Functional Polymers, 151(104574), -. DOI: 10.1016/j.reactfunctpolym.2020.104574
DOI del artículo: 10.1016/j.reactfunctpolym.2020.104574
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2020
Tipo de publicación: Journal Publications
Repositori URV