Exploració per autor "Fernández Francos, Xavier"
Ara es mostren els items 29-48 de 115
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Easily recycled thiol-ene elastomers with controlled creep
Alzubi, Hani Khaled Mohammad; Konuray, Ali Osman; Fernández Francos, Xavier; Ramis Juan, Xavier; Moradi, Sasan (Elsevier, 2024-03)
Article
Accés obertStarting from in-house synthesized allylic monomers containing dynamic disulfide (S–S) bonds, a set of vitrimeric thiol-ene elastomers were prepared and characterized with respect to their viscoelastic and tensile properties. ... -
Effect of a hyperbranched polymer over the thermal curing and the photocuring of an epoxy resin
Morancho Llena, José María; Cadenato Matia, Ana María; Ramis Juan, Xavier; Fernández Francos, Xavier; Flores Guillen, Marjorie; Salla Tarragó, José María (2011)
Article
Accés restringit per política de l'editorialIn this study, the authors study by calorimetry the influence of hyperbranched polyester Boltron®H40 on the thermal curing and the photocuring of a diglycidyl ether of bisphenol epoxy resin (DGEBA) using ytterbium (III) ... -
Effect of hydroxyl ended and end-capped multiarm star polymers on the curing process and mechanical characteristics of epoxy/anhydride thermosets
Acebo Gorostiza, Cristina; Picardi, Annamaria; Fernández Francos, Xavier; Flor López, Sílvia de la; Ramis Juan, Xavier; Serra Albet, Maria Àngels (2014-08-01)
Article
Accés restringit per política de l'editorialMultiarm star polymers have been synthesized by cationic ring-opening polymerization of epsilon-caprolactone from a hyperbranched poly(ethyleneimine) core and end-capped with acetic anhydride. These star polymers have been ... -
Effect of the network structure and programming temperature on the shape-memory response of thiol-epoxy "click" systems
Belmonte, Alberto; Guzman, Dailyn; Fernández Francos, Xavier; Flor López, Sílvia de la (2015-10-01)
Article
Accés obertThis paper presents a new methodology to develop “thiol-epoxy” shape-memory polymers (SMPs) with enhanced mechanical properties in a simple and efficient manner via “click” chemistry by using thermal latent initiators. ... -
Efficient impact resistance improvement of epoxy/anhydride thermosets by adding hyperbranched polyesters partially modified with undecenoyl chains
Flores Guillen, Marjorie; Fernández Francos, Xavier; Ferrando Piera, Francesc; Ramis Juan, Xavier; Serra Albet, Maria Àngels (Elsevier, 2012-10-26)
Article
Accés restringit per política de l'editorialBoltorn H30 hyperbranched polyester has been modified by acylation with 10-undecenoyl chloride to obtain HBPs with different degree of modification. These HBPs have been used as reactive modifiers, in a proportion of 5 and ... -
Electro-responsive shape-memory composites obtained via dual-curing processing
Russo, Claudio; Ramirez Falo, José Luis; Fernández Francos, Xavier; Flor López, Sílvia de la (2022-01-01)
Article
Accés obertIn this work, electro-responsive shape-memory actuators were developed by incorporating a conductive heater in a dual-curing thiol-acrylate-epoxy shape-memory polymer (SMP). A conductive heater, consisting of an electrically ... -
Enhancement in the glass transition temperature in latent thiol-epoxy click cured thermosets
Guzmán, Daylin; Ramis Juan, Xavier; Fernández Francos, Xavier; Serra Albet, Maria Àngels (2015-01-01)
Article
Accés obertTri and tetrafunctional thiol were used as curing agent for diglycidyl ether of bisphenol A (DGEBA) catalyzed by a commercially available amine precursor, LC-80. Triglycidyl isocianurate (TGIC) was added in different ... -
Enhancement of 3D-printable materials by dual-curing procedures
Fernández Francos, Xavier; Konuray, Ali Osman; Ramis Juan, Xavier; Serra Albet, Maria Àngels; Flor López, Sílvia de la (Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-01)
Article
Accés obertDual-curing thermosetting systems are recently being developed as an alternative to conventional curing systems due to their processing flexibility and the possibility of enhancing the properties of cured parts in single- ... -
Enhancement of the impact strength of cationically cured cycloaliphatic diepoxide by adding hyperbranched poly(glycidol) partially modified with 10-undecenoyl chains
Flores Guillen, Marjorie; Morell, Mireia; Fernández Francos, Xavier; Ferrando Piera, Francesc; Ramis Juan, Xavier; Serra Albet, Maria Àngels (2013-06)
Article
Accés restringit per política de l'editorialA hyperbranched poly(glycidol) has been synthesized and modified by acylation with 10-undecenoyl chloride to obtain hyperbranched polymers (HBPs) with different degree of modification. These HBPs have been used as reactive ... -
Environmentally-friendly processing of thermosets by two-stage sequential aza-Michael addition and free-radical polymerization of amine-acrylate mixtures
Gonzalez, Gustavo; Fernández Francos, Xavier; Serra Albet, Maria Àngels; Sangermano, Marco; Ramis Juan, Xavier (2015-01-01)
Article
Accés obertA new dual-curing, solvent-free process is described for the preparation of tailor-made materials from off-stoichiometric amine-acrylate formulations. The first stage reaction is a self-limiting click aza-Michael addition ... -
Epoxy Doped, Nano-scale Phase-separated Poly-Acrylates with Potential in 3D Printing
Konuray, Ali Osman; Bonada Bo, Jordi; Fernández Francos, Xavier; Ramis Juan, Xavier (2021-01-01)
Article
Accés obertAn efficient method to improve the mechanical performance of a commercially available photocure resin is described wherein the resin is modified with a mixture of a cycloaliphatic epoxy and an anhydride curing agent. ... -
Epoxy sol-gel hybrid thermosets
Serra Albet, Maria Àngels; Ramis Juan, Xavier; Fernández Francos, Xavier (MDPI AG, 2016-02-03)
Article
Accés obertSol-gel methodologies are advantageous in the preparation of hybrid materials in front of the conventional addition of nanoparticles, because of the fine dispersion of the inorganic phase that can be reached in epoxy ... -
Epoxy-based shape-memory actuators obtained via dual-curing of off-stoichiometric \"thiol-epoxy\" mixtures
Belmonte, Alberto; Russo, Claudio; Ambrogi, Veronica; Fernández Francos, Xavier; Flor López, Sílvia de la (2017-03-21)
Article
Accés obertIn this work, epoxy-based shape-memory actuators have been developed by taking advantage of the sequential dual-curing of off-stoichiometric “thiol–epoxy” systems. Bent-shaped designs for flexural actuation were obtained ... -
Epoxy/anhydride thermosets modified with end-capped star polymers with poly(ethyleneimine) cores of different molecular weight and poly(epsilon-caprolactone) arms
Acebo Gorostiza, Cristina; Alorda, M.; Ferrando Piera, Francesc; Fernández Francos, Xavier; Serra Albet, Maria Àngels; Morancho Llena, José María; Salla Tarragó, José María; Ramis Juan, Xavier (2015-09-01)
Article
Accés obertMultiarm star polymers, with a hyperbranched poly(ethyleneimine) (PEI) core and poly(epsilon-caprolactone) (PCL) arms end-capped with acetyl groups were synthesized by ring-opening polymerization of epsilon-caprolactone ... -
Estudio calorimétrico de los cambios en la cristalinidad de membranas
Salla Tarragó, José María; Cadenato Matia, Ana María; Morancho Llena, José María; Fernández Francos, Xavier; Ramis Juan, Xavier (2011)
Comunicació de congrés
Accés restringit per política de l'editorialEn este trabajo se analizan los cambios en el grado de cristalización y en los hábitos cristalinos que el ácido sulfosuccínico (SSA) produce en membranas de polivinil alcohol (PVA). Las membranas resultantes del ... -
From curing kinetics to network structure: A novel approach to the modeling of the network buildup of epoxy-anhydride thermosets
Fernández Francos, Xavier; Ramis Juan, Xavier; Serra Albet, Maria Àngels (2014-01-01)
Article
Accés restringit per política de l'editorialThe curing kinetics and network buildup during curing of epoxy–anhydride formulations using tertiary amines as initiators are reviewed in this work. A mechanism-based kinetic and structural model has been defined, showing ... -
Fully renewable thermosets based on bis-eugenol prepared by thiol-click chemistry
Guzman, Dailyn; Serra Albet, Maria Àngels; Ramis Juan, Xavier; Fernández Francos, Xavier; Flor López, Sílvia de la (2019-03-01)
Article
Accés obertThiol-ene photocuring and thiol-epoxy thermal curing have been applied to prepare new thermosets from renewable substrates. As monomers, a tetrallyl and a tetraepoxy derivative of bis-eugenol were prepared by dimerization ... -
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 ...