Exploració per autor "Ramis Juan, Xavier"
Ara es mostren els items 56-75 de 154
-
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) ... -
Improved epoxy thermosets by the use of poly(ethyleneimine) derivatives
Acebo Gorostiza, Cristina; Ramis Juan, Xavier; Serra Albet, Maria Àngels (De Gruyter, 2017-07)
Article
Accés obertEpoxy resins are commonly used as thermosetting materials due to their excellent mechanical properties, high adhesion to many substrates and good heat and chemical resistances. This type of thermosets is intensively used ... -
Improvement of mechanical properties of epoxy/anhydride coatings using sepiolite and a hyperbranched polyster
Serra Albet, Maria Àngels; Foix, David; Rodríguez, María Teresa; Ferrando Piera, Francesc; Ramis Juan, Xavier (2012)
Comunicació de congrés
Accés restringit per política de l'editorialEpoxy resins are one of the most successful thermosetting materials when it comes to industrial application, and their uses embraces adhesives, coatings, encapsulation of electronic components and matrices of composite ... -
Influence of end groups in hyperbranched polyesters used as modifiers in the characteristics of epoxy thermosets cured by adipic dihydrazide
Tomuta, Adrian Marius; Ramis Juan, Xavier; Flor López, Sílvia de la; Serra Albet, Maria Àngels (2013-07)
Article
Accés obertMixtures of diglycidylether of bisphenol A (DGEBA) resin and different ratios of aliphatic-aromatic hyperbranched polyester (HBP) were cured by a latent curing agent, adipic dihydrazide (AH). The HBPs prepared have ... -
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 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 (2017-10-06)
Article
Accés obertThe influence of UV post-curing process on mechanical propertie s as well as photocuring conversion ratios is presented. An analytical model to determ inate the conversion ratio for frontal polymerization is used to 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 ... -
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 ... -
Mechanical characterization of sol–gel epoxy-silylatedhyperbranched poly(ethyleneimine) coatings by meansof Depth Sensing Indentation methods
Vicente, Lorenzo; Acebo Gorostiza, Cristina; Ramis Juan, Xavier; Serra Albet, Maria Àngels (2016-03)
Article
Accés obertA series of hybrid epoxy-silica coatings were prepared from a synthesized hyperbranched poly(ethyleneimine) with ethoxysilyl groups at the chain ends and diglycidylether of bisphenol A in different proportions. The curing ... -
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 ... -
Muestras con melatonina. Muestras analizadas: A027-47 y A027-48
Morancho Llena, José María; Ramis Juan, Xavier; Salla Tarragó, José María (2014-07-22)
Report de recerca
Accés restringit per política de l'editorial -
Multiarm star poly(glycidol)-block-poly(e-caprolactone) of different arm lengths and their use as modifiers of diglycidylether of bisphenol a thermosets
Morell, Mireia; Lederer, Albena; Ramis Juan, Xavier; Voit, Brigitte; Serra Albet, Maria Àngels (2011-01-01)
Article
Accés restringit per política de l'editorialWell-defined multiarm star copolymers, hyperbranched poly(glycidol)-b-poly(e-caprolactone), with an average of 100–110 arms per molecule and a molecular weight of arms of 3000 g/mol (PGOH-b-PCL30) and 1000 g/mol ... -
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- ...