Autor segons l'article: Guerrero, Federico; Gamardella, Francesco; Ramis, Xavier; De la Flor, Silvia; Serra, Angels
Departament: Enginyeria Mecànica Química Analítica i Química Orgànica
Autor/s de la URV: De la Flor Lopez, Silvia / Gamardella, Francesco / Guerrero Ruiz, Federico / Serra Albet, Maria Angels
Paraules clau: Ring-opening polymerization Reshapability Recyclability Poly(thiourethanes) Lanthanide triflates Covalent adaptable networks thermosets resins reshapability recyclability lanthanide triflates lactones isocyanate facile dgeba curing initiators covalent adaptable networks cationic copolymerization catalysts
Resum: Covalent adaptable networks (CANs) are new polymeric materials with the mechanical properties of thermosets and the possibility of being recycled like thermoplastics. Poly(thiourethane) networks have demonstrated vitrimeric-like behavior at high temperatures due to the trans-thiocarbamoylation process, which Lewis acids and bases can accelerate. In this study, we report the use of lanthanide triflates (La, Sm, Dy, Er, and Yb) as Lewis acid catalysts, a greener alternative to other metallic catalysts as dibutyltin dilaurate (DBTDL) widely used in poly(urethane) and poly(thiourethane) networks. Moreover, they are not as reactive as DBTDL, and the curing mixture can be manipulated for a longer time at room temperature. As monomers, trimethylolpropane tris(3-mercapto propionate) (S3), hexamethylene diisocyanate (HDI), and isophorone diisocyanate (IPDI) have been used. We have demonstrated that the materials prepared with lanthanum triflate present the lowest relaxation times than those prepared with other lanthanide triflates or DBTDL. Calorimetry (DSC) and infrared spectroscopy (FTIR) were applied to study the curing process. The materials obtained were fully characterized by thermogravimetric analysis (TGA) and thermomechanical tests (DMA).
Àrees temàtiques: Química Polymers and plastics Polymer science Organic chemistry Medicina ii Materials chemistry Materiais Interdisciplinar Farmacia Engenharias iv Engenharias iii Engenharias ii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Biotecnología Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: angels.serra@urv.cat federico.guerrero@estudiants.urv.cat federico.guerrero@estudiants.urv.cat silvia.delaflor@urv.cat
Identificador de l'autor: 0000-0003-1387-0358 0000-0001-7163-4068 0000-0001-7163-4068 0000-0002-6851-1371
Data d'alta del registre: 2024-11-02
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Polymer. 283 126262-
Referència de l'ítem segons les normes APA: Guerrero, Federico; Gamardella, Francesco; Ramis, Xavier; De la Flor, Silvia; Serra, Angels (2023). The use of lanthanide triflates in the preparation of poly(thiourethane) covalent adaptable networks. Polymer, 283(), 126262-. DOI: 10.1016/j.polymer.2023.126262
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2023
Tipus de publicació: Journal Publications
Repositori URV