Exploració per autor "Fernández Francos, Xavier"
Ara es mostren els items 46-65 de 115
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Hard epoxy thermosets obtained via two sequential epoxy-amine condensations
Konuray, Ali Osman; García, Aina; Morancho Llena, José María; Fernández Francos, Xavier; Serra Albet, Maria Àngels; Ferrando Piera, Francesc; García Álvarez, Montserrat; Ramis Juan, Xavier (Elsevier, 2019-07-01)
Article
Accés obertA new family of dual-curable poly(ß-hydroxyamine ether) thermosets based on amine-epoxy formulations has been prepared and characterized. Both curing stages consist in an epoxy-amine polycondensation, each having different ... -
Harnessing disulfide and transesterification bond exchange reactions for recyclable and reprocessable 3D-printed vitrimers
Vilanova Pérez, Anna; Moradi, Sasan; Konuray, Ali Osman; Ramis Juan, Xavier; Roig Gibert, Adriá; Fernández Francos, Xavier (2024-02-01)
Article
Accés obertTwo new vitrimeric materials have been studied for potential additive manufacturing applications such as 3D- printing. A monomer containing disulfide bonds and ß-hydroxyesters was easily synthesized from two low- cost and ... -
Highly exfoliated nanostructure in trifunctional epoxy/clay nanocomposites using boron trifluoride as initiator
Hutchinson, John M.; Shiravand, Fatemeh; Calventus Solé, Yolanda; Fernández Francos, Xavier; Ramis Juan, Xavier (Wiley, 2014-03-15)
Article
Accés obertEpoxy/clay nanocomposites based upon a trifunctional epoxy resin, triglycidyl p-amino phenol (TGAP), have been prepared by intercalating an initiator of cationic homopolymerization, a boron trifluoride monoethylamine ... -
Hybrid epoxy networks from ethoxysilyl-modified hyperbranched poly(ethyleneimine) and inorganic reactive precursors
Acebo Gorostiza, Cristina; Fernández Francos, Xavier; Santos, Jose-Ignacio; Messori, Massimo; Ramis Juan, Xavier; Serra Albet, Maria Àngels (2015-09-01)
Article
Accés obertNew epoxy-silica hybrid coatings were prepared by a dual process consisting of a sol-gel process using tetraethoxysilane (TEOS) or 3-glycidyloxypropyl trimethoxysilane (GPTMS) in the presence of hyperbranched poly(ethyleneimine) ... -
ICTAC Kinetics Committee recommendations for analysis of thermal polymerization kinetics
Vyazovkin, Sergey; Achilias, Dimitris; Fernández Francos, Xavier; Galukhin, Andrey; Sbirrazzuoli, Nicolas (Elsevier, 2022-08-01)
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Accés restringit per política de l'editorialThe present recommendations have been developed by the Kinetics Committee of the International Confederation for Thermal Analysis and Calorimetry (ICTAC). The recommendations provide guidance on kinetic analysis of thermal ... -
Influence of exposure time on mechanical properties and photocuring conversion ratios for photosensitive materials used in additive manufacturing
Bonada Bo, Jordi; Muguruza Blanco, Asier; Fernández Francos, Xavier; Ramis Juan, Xavier (2017)
Text en actes de congrés
Accés obertThe influence of UV post - curing process on mechanical properties as well as photocuring conversion ratios is presented. An analytical model to determinate the conversion ratio for frontal polymerization is used t o define ... -
Influence of the end groups of hyperbranched poly(glycidol) on the cationic curing and morphology of diglycidylether of bisfenol A thermosets
Santiago, David; Morell, Mireia; Fernández Francos, Xavier; Serra Albet, Maria Àngels; Salla Tarragó, José María; Ramis Juan, Xavier (2011-03)
Article
Accés restringit per política de l'editorialThe cationic curing of DGEBA with hyperbranched polymers (HBPs) based on poly(glycidol) using ytterbium triflate as initiator, has been studied. Poly(glycidol) (PG) has been synthesized and the terminal hydroxyl groups ... -
Kinetic studies of the degradation of poly (vinyl alcohol)-based proton-conducting membranes at low temperatures
Morancho Llena, José María; Salla Tarragó, José María; Cadenato Matia, Ana María; Fernández Francos, Xavier; Ramis Juan, Xavier; Colomer Vilanova, Pere; Ruiz Mansilla, Rafael; Calventus Solé, Yolanda (2011-07-10)
Article
Accés restringit per política de l'editorialThermal decomposition of unmodified poly(vinyl alcohol) (PVA) and poly(vinyl alcohol) crosslinked with sulfosuccinic acid (SSA) membranes has been studied using thermogravimetry (TGA) and ATR Fourier transform infrared ... -
Kinetics analysis and simulation of sequential epoxy dual-curing systems with independent thermal activation
Santín Serrano, David; Konuray, Ali Osman; Fernández Francos, Xavier; Ramis Juan, Xavier (2019-03-01)
Article
Accés obertThe curing kinetics of a sequential dual-curing system based on an off-stoichiometric amine-epoxy formulation with intermediate latent reactivity has been analyzed. The first curing stage is an epoxy-amine polycondensation ... -
Laccase-assisted formation of bioactive chitosan/gelatin hydrogel stabilized with plant polyphenols
Rocasalbas Lozano, Guillem; Francesko, Antonio; Touriño Eirín, Sonia; Fernández Francos, Xavier; Guebitz, Georg M.; Tzanov, Tzanko (2013-02-15)
Article
Accés restringit per política de l'editorialLaccase-assisted simultaneous cross-linking and functionalization of chitosan/gelatin blends with phenolic compounds from Hamamelis virginiana was investigated for the development of bioactive hydrogel dressings. The ... -
Latent curing of epoxy-thiol thermosets
Konuray, Ali Osman; Fernández Francos, Xavier; Ramis Juan, Xavier (Elsevier, 2017-05-05)
Article
Accés obertEpoxy-thiol curing is a click reaction which allows quantitative yield of the end products. The base-catalyzed reaction is rapid at low temperatures so it is most often desirable to harness reactivity by using latent ... -
Modification of epoxy-anhydride thermosets using a hyperbranched poly(este-amide): I. Kinetic study
Fernández Francos, Xavier; Rybak, Andrzej; Sekula, Robert; Ramis Juan, Xavier; Serra Albet, Maria Àngels (2012-05-16)
Article
Accés restringit per política de l'editorialAn epoxy-anhydride formulation used for the coating of electrical devices was modified with a commercially available hyperbranched poly(ester-amide), HybraneS2200, in order to improve the thermal degradability of the ... -
Modification of epoxy–anhydride thermosets with a hyperbranched poly(ester amide). II. Thermal, dynamic mechanical, and dielectric properties and thermal reworkability
Fernández Francos, Xavier; Rybak, Andrzej; Sekula, Emil; Ramis Juan, Xavier; Ferrando Piera, Francesc; Okrasa, Lidia; Serra Albet, Maria Àngels (2013-06)
Article
Accés restringit per política de l'editorialAn epoxy–anhydride formulation used for the coating electrical devices was modified with a commercially available hyperbranched poly(ester amide), Hybrane S2200, to improve the thermal degradability of the resulting thermoset ... -
Motion control in free-standing shape-memory actuators
Belmonte Parra, Alberto; Lama, Giuseppe C.; Cerruti, Pierfrancesco; Fernández Francos, Xavier; Flor López, Sílvia de la (2018-07-01)
Article
Accés obertIn this work, free-standing shape-memory thermally triggered actuators are developed by laminating 'thiol-epoxy'-based glassy thermoset (GT) and stretched liquid-crystalline network (LCN) films. A sequential curing process ... -
Multiarm star with poly(ethyleneimine) core and poly(epsilon-caprolactone) arms as modifiers of diglycidylether of bisphenol A thermosets cured by 1-methylimidazole
Acebo, Cristina; Fernández Francos, Xavier; Ferrando Piera, Francesc; Serra Albet, Maria Àngels; Salla Tarragó, José María; Ramis Juan, Xavier (2013-03)
Article
Accés restringit per política de l'editorialWell-defined multiarm star copolymers, with hyperbranched poly(ethyleneimine) (PEI) as the core and poly(e-caprolactone) (PCL) arms with different degree of polymerization were synthesized by cationic ring-opening ... -
Multifunctional allyl-terminated hyperbranched poly(ethyleneimine) as component of new thiol–ene/thiol–epoxy materials
Acebo Gorostiza, Cristina; Fernández Francos, Xavier; Ramis Juan, Xavier; Serra Albet, Maria Àngels (2016-02)
Article
Accés obertA new allyl terminated hyperbranched poly(ethyleneimine) was synthesized and characterized and then used in different proportions as multifunctional macromonomer in tetrathiol – diglycidyl ether of bisphenol A formula- ... -
Network structure and thermomechanical properties of hybrid DGEBA networks cured with 1-methylimidazole and hyperbranched poly(ethyleneimine)s
Fernández Francos, Xavier; Santiago, David; Ferrando Piera, Francesc; Ramis Juan, Xavier; Salla Tarragó, José María; Serra Albet, Maria Àngels; Sangermano, Marco (2012-11-01)
Article
Accés restringit per política de l'editorialhe use of commercially available hyperbranched poly(ethyleneimine)s (Lupasol TM , BASF) as polymeric modifiers in diglycidyl ether of bisphenol A thermosetting formulations using 1-methylimidazole (MI) as anionic ... -
Network structure dependence on unconstrained isothermal-recovery processes for shape-memory thiol-epoxy "click" systems
Belmonte Parra, Alberto; Fernández Francos, Xavier; de la Flor1 López, Sílvia; Serra Albet, Maria Àngels (2017-05-01)
Article
Accés obertThe shape-memory response (SMR) of “click” thiol-epoxy polymers produced using latent catalysts, with different network structure and thermo-mechanical properties, was tested on unconstrained shape-recovery processes under ... -
New allyl-functional catalytic comonomers for sequential thiol-Michael and radical thiol-ene reactions
Konuray, Ali Osman; Fernández Francos, Xavier; Ramis Juan, Xavier; Serra Albet, Maria Àngels (Elsevier, 2018-02-28)
Article
Accés obertSoft poly(thioether) thermosets have been synthesized by employing a two-step curing procedure based on click chemistry. The first stage of curing is a thiol-Michael addition between acrylates (or methacrylates) and thiols ... -
New anhydride/epoxy thermosets based on diglycidyl ether of bisphenol A and 10-undecenoyl modified poly(ethyleneimine) with improved impact resistance
Acebo Gorostiza, Cristina; Fernández Francos, Xavier; Flor López, Sílvia de la; Ramis Juan, Xavier; Serra Albet, Maria Àngels (2015-08-01)
Article
Accés obertNew dendritic modifiers have been synthesized by amidation of hyperbranched poly(ethylenimine)(PEIs) with 10-undecenoic acid to obtain hyperbranched polymers (HBPs) with different degree of modification. These HBPs have ...