Itziar Otaegi

High-Molecular-Weight Isodimorphic Copolyesters with Tunable Ductility, Barrier Performance, and Adhesive Behavior

Juan Luis Tirado Torres, Ricardo A. Pérez-Camargo, Fernando Vidal, Daniele Mantione et autres

Abstract Designing biodegradable polymers that combine high performance with controlled end-of-life degradation remains a key challenge in sustainable materials science. Here, we show how isodimorphic crystallization enables control of mechanical performance, melt viscoelasticity, and degradation in semicrystalline copolyesters. High-molecular-weight poly(dodecamethylene succinate-ran-ε-caprolactone) (DSxCLy) …

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UV-curable non-isocyanate polyurethane/acrylate (NIPUA) hybrid coatings via transurethanization: A sustainable approach

Iker Razquin, Iker Hidalgo-Gallardo, Higer Balda-Intxaurraga, Loli Martin et autres

(Meth)Acrylic end-capped non-isocyanate polyurethanes (NIPUAs) were synthesized via transurethanization. The resulting prepolymers were then blended with acrylic monomers to produce UV-curable hybrid urethane/acrylic coatings. The structural characterization of the prepolymers before curing was performed using Fourier transform infrared spectroscopy (FTIR), proton nuclear …

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From Waste to Wires: PBAT/Lignin Biocomposites Functionalized by a CO2 Laser for Transient Electronics

Antonella Moramarco, Elio Sarotto, Itziar Otaegi, Nora Aranburu et autres

Polybutylene adipate terephthalate (PBAT), a flexible biodegradable polyester, has gained widespread use in packaging applications due to its ability to degrade under controlled conditions, producing non-toxic substances. While this property makes PBAT particularly attractive for the development of transient electronic devices, this …

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Single-bond dual dynamics: Temperature-gated associative and dissociative exchange of disulfides in a sustainable covalent adaptable network

Federico Guerrero, Itziar Otaegi, Ester Verde‐Sesto, Jon Maiz

Dynamic covalent chemistry provides a powerful route to sustainable polymer networks, yet achieving precise control over multiple exchange mechanisms within a single bond remains challenging. Here, we report a covalent adaptable network (CAN) based exclusively on disulfide bonds that exhibits a temperature-gated …

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Elucidating the Pivotal Role of Thermodynamics and Nanofiller Geometry on the Stereocomplexation of Polylactide Nanocomposites Filled With Graphene Oxide, Carbon Nanotubes, and Their Hybrid

Mohammad Raef, Idoia Alayeto, Itziar Otaegi, Nora Aranburu et autres

ABSTRACT Incorporating nanoparticles can meaningfully alter the stereocomplexation of polylactide systems. In the current study, the stereocomplex crystallization behavior, microstructure, electrical conductivity, wettability, and thermal stability performance of stereocomplexed‐polylactide nanocomposites loaded with graphene oxide, carbon nanotubes, and their nanohybrid system (1:1) from …

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Continuous carbon fiber Additive Preforming and its application for the fabrication of epoxy composites

Enrique Hernández‐Murillo, Itziar Otaegi, Itxaso Calafel, Luis Palenzuela et autres

Abstract This study presents Additive Preforming, a novel technique for manufacturing continuous fiber‐reinforced polymer composites. The new technique consists of 3D printing continuous fiber filaments coated with a suitable thermoplastic for the fabrication of continuous fiber preforms. These preforms can eventually be …

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UV-Curable Non-Isocyanate Polyurethane/Acrylate (NIPUA) Hybrid Coatings via Transurethanization: A Sustainable Approach

Alba González, I. Martín, Iker Hidalgo-Gallardo, Higer Balda-Intxaurraga et autres

Probing the remarkable vitrimeric performance of Poly(dithiourethanes): A comprehensive investigation into the dynamic behavior

Federico Guerrero, Sebastián Bonardd, Itziar Otaegi, Ester Verde‐Sesto et autres

Vitrimers and vitrimer-like systems are renowned for their exceptional mechanical and thermal characteristics, coupled with their inherent recyclability. In this study, a novel class of vitrimer-like systems is introduced, wherein a tetrathiol and diisothiocyanate are blended to create poly(dithiourethanes), catalyzed by a …

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Revealing Dynamic Behavior in High Dielectric Poly(thiourethane)-Based Vitrimer-like Materials

Federico Guerrero, Itziar Otaegi, Ester Verde‐Sesto, Sebastián Bonardd et autres

High Resolution Image Download MS PowerPoint Slide Here, we have explored covalent adaptable networks (CANs) comprising poly(thiourethane)-based systems (PTUs). The PTUs were synthesized through the combination of thiol and isocyanate monomers in stoichiometric proportions, in the presence of dibutyltin dilaurate (DBTDL) as …

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Production of supertough and semiconductive PLA-based polymer blend nanocomposites by kinetic microstructural control

Ainhoa Fernández‐Tena, Itxaso Calafel, Itziar Otaegi, Gonzalo Guerrica‐Echevarría et autres

Polymer nanocomposites with superior multi-functional properties can be fabricated by tuning their morphology. In this work, a supertough and semiconductive polylactide (PLA)-based polymer blend nanocomposite (PBNANO) was produced for the first time via melt blending with a core-shell rubber (CSR) and carbon …

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Unlocking superior properties in polypropylene/polyethylene terephthalate (PP/PET) blends using an ethylene-butylene-acrylate terpolymer reactive compatibilizer

Sebastián Coba-Daza, Itziar Otaegi, Nora Aramburu, Gonzalo Guerrica‐Echevarría et autres

The increasing global plastic production has created an urgent demand for energy-efficient processes to transform mixed plastic waste into value-added products via upcycling. Compatibilization of polypropylene (PP) and poly(ethylene terephthalate) (PET), two used semi-crystalline polymers in industry, is investigated in this study. …

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High‐Impact PLA in Compatibilized PLA/PCL Blends: Optimization of Blend Composition and Type and Content of Compatibilizer

Ainhoa Fernández‐Tena, Itziar Otaegi, Lourdes Irusta, Gonzalo Guerrica‐Echevarría et autres

Abstract In this work, the effectiveness of seven commercial compatibilizers is tested in polylactide (PLA)/poly(ε‐caprolactone) (PCL) blends with different compositions to obtain a high‐impact PLA. None of the compatibilizers is effective for 90/10 and 80/20 PLA/PCL compositions, as no improvement of the …

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