Autor segons l'article: Guerrero, Federico; De la Flor, Silvia; Ramis, Xavier; Santos, Jose-Ignacio; Serra, Angels;
Departament: Enginyeria Mecànica Química Analítica i Química Orgànica
Autor/s de la URV: De la Flor Lopez, Silvia / Guerrero Ruiz, Federico / Serra Albet, Maria Angels
Paraules clau: Vitrimers Thermosets Poss Polyurethane Poly(thiourethane) Oligomeric silsesquioxane poss Nanocomposites Kinetics Epoxy Dielectric-properties Click reaction Chemistry
Resum: Organic-inorganic hybrid materials combine the advantages of both phases: hardness and strength of inorganic phase and elasticity and toughness of the organic matrix. In the present study, we have prepared nanocomposites with a poly(thiourethane) polymeric matrix and silsesquioxane-type structures, with thiols as reactive groups (POSS-A or POSS-B, synthesized in different pressure conditions), looking for a covalent interaction between both phases, and good dispersion. Due to the click behavior of the reaction between the isocyanate and the thiol groups, highly homogeneous materials are obtained. Both monomers, catalyst (dibutyltin dilaurate, DBTDL), and the POSS precursor (3-mercaptopropyl trimethoxysilane, MPTMS), are commercially available, which present the advantage of being industrially scalable. The incorporation of POSS leads to an increase in glassy and rubbery storage moduli and the temperature of the maximum of tan delta curve. The vitrimeric behavior of the poly(thiourethanes) improved with the POSS incorporation, getting lower relaxation times. With a higher proportion of closed cages, POSS-B leads to the most significant improvements. All the materials prepared showed high transparency and the fracture of POSS modified materials indicates an improved toughness.
Àrees temàtiques: Química Polymers and plastics Polymer science Physics and astronomy (miscellaneous) Physics and astronomy (all) Organic chemistry Odontología Materials chemistry Materiais Interdisciplinar General physics and astronomy Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências ambientais Ciência de alimentos Ciência da computação Biotecnología Astronomia / física Arquitetura, urbanismo e design
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: silvia.delaflor@urv.cat angels.serra@urv.cat federico.guerrero@estudiants.urv.cat federico.guerrero@estudiants.urv.cat
Identificador de l'autor: 0000-0002-6851-1371 0000-0003-1387-0358 0000-0001-7163-4068 0000-0001-7163-4068
Data d'alta del registre: 2024-04-06
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/pii/S001430572200341X
URL Document de llicència: http://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: European Polymer Journal. 174
Referència de l'ítem segons les normes APA: Guerrero, Federico; De la Flor, Silvia; Ramis, Xavier; Santos, Jose-Ignacio; Serra, Angels; (2022). Novel hybrid organic/inorganic poly(thiourethane) covalent adaptable networks. European Polymer Journal, 174(), -. DOI: 10.1016/j.eurpolymj.2022.111337
DOI de l'article: 10.1016/j.eurpolymj.2022.111337
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2022
Tipus de publicació: Journal Publications
Repositori URV