Articles producció científica> Química Analítica i Química Orgànica

Dual-curable stereolithography resins for superior thermomechanical properties

  • Datos identificativos

    Identificador: imarina:6685014
    Autores:
    Konuray ODi Donato FSangermano MBonada JTercjak AFernández-Francos XSerraRamis X
    Resumen:
    © 2020, BME-PT and GTE. All rights reserved. Stereolithography (SL) stands out as a relatively fast additive manufacturing method to produce thermoset components with high resolutions. The majority of SL resins consist of acrylate monomers which result in materials with cur-ing-induced shrinkage problems and this, in addition to the incomplete and non-uniform conversions reached in the SL process, results in poor mechanical properties. To address this issue, a dual-curing formulation was developed by mixing an epoxy monomer into a commercial multi-acrylate SL resin: the first curing stage is acrylate free-radical photopolymerization at ambient temperature, and the second curing stage is cationic epoxy homopolymerization at higher temperatures. The fully dual-cured materials are macroscopically homogeneous, with nanoscale domains observed by Atomic Force Mi-croscopy (AFM), and with unimodal tan delta peaks observed in Dynamic Mechanical Analysis (DMA). The uncured material was storage stable at ambient conditions for at least 9 weeks since the epoxy part was virtually unreactive at these temper-atures. With the dual-cured materials, a nearly 10-fold increase in Young’s modulus was achieved over the neat acrylate resin. At the thermal curing stage, the presence of diperoxyketal thermal radical initiator to the liquid formulation facilitated the polymerization of unreacted acrylates that remained from the SL process simultaneously with epoxy homopolymerization and helped the material attain improved properties.
  • Otros:

    Autor según el artículo: Konuray O; Di Donato F; Sangermano M; Bonada J; Tercjak A; Fernández-Francos X; Serra ; Ramis X
    Departamento: Química Analítica i Química Orgànica
    Autor/es de la URV: Fernández Francos, Xavier / Serra Albet, Maria Angels
    Palabras clave: Thermosetting resins Stereolithography Projection Polyester Optimization Ether Epoxy thermosets Epoxy Dual-curing Cationic-polymerization Accuracy
    Resumen: © 2020, BME-PT and GTE. All rights reserved. Stereolithography (SL) stands out as a relatively fast additive manufacturing method to produce thermoset components with high resolutions. The majority of SL resins consist of acrylate monomers which result in materials with cur-ing-induced shrinkage problems and this, in addition to the incomplete and non-uniform conversions reached in the SL process, results in poor mechanical properties. To address this issue, a dual-curing formulation was developed by mixing an epoxy monomer into a commercial multi-acrylate SL resin: the first curing stage is acrylate free-radical photopolymerization at ambient temperature, and the second curing stage is cationic epoxy homopolymerization at higher temperatures. The fully dual-cured materials are macroscopically homogeneous, with nanoscale domains observed by Atomic Force Mi-croscopy (AFM), and with unimodal tan delta peaks observed in Dynamic Mechanical Analysis (DMA). The uncured material was storage stable at ambient conditions for at least 9 weeks since the epoxy part was virtually unreactive at these temper-atures. With the dual-cured materials, a nearly 10-fold increase in Young’s modulus was achieved over the neat acrylate resin. At the thermal curing stage, the presence of diperoxyketal thermal radical initiator to the liquid formulation facilitated the polymerization of unreacted acrylates that remained from the SL process simultaneously with epoxy homopolymerization and helped the material attain improved properties.
    Áreas temáticas: Química Polymers and plastics Polymer science Physical and theoretical chemistry Organic chemistry Odontología Materials chemistry Materiais Interdisciplinar General chemical engineering Farmacia Engenharias iv Engenharias iii Engenharias ii Ciências biológicas iii Ciências biológicas i Ciências ambientais Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Astronomia / física
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 1788-618X
    Direcció de correo del autor: xavier.fernandez@urv.cat angels.serra@urv.cat
    Identificador del autor: 0000-0002-3492-2922 0000-0003-1387-0358
    Página final: 894
    Fecha de alta del registro: 2023-02-19
    Volumen de revista: 14
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://upcommons.upc.edu/handle/2117/329558
    Referencia al articulo segun fuente origial: Express Polymer Letters. 14 (9): 881-894
    Referencia de l'ítem segons les normes APA: Konuray O; Di Donato F; Sangermano M; Bonada J; Tercjak A; Fernández-Francos X; Serra ; Ramis X (2020). Dual-curable stereolithography resins for superior thermomechanical properties. Express Polymer Letters, 14(9), 881-894. DOI: 10.3144/expresspolymlett.2020.72
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI del artículo: 10.3144/expresspolymlett.2020.72
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2020
    Página inicial: 881
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Chemical Engineering (Miscellaneous),Materials Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Polymer Science,Polymers and Plastics
    Thermosetting resins
    Stereolithography
    Projection
    Polyester
    Optimization
    Ether
    Epoxy thermosets
    Epoxy
    Dual-curing
    Cationic-polymerization
    Accuracy
    Química
    Polymers and plastics
    Polymer science
    Physical and theoretical chemistry
    Organic chemistry
    Odontología
    Materials chemistry
    Materiais
    Interdisciplinar
    General chemical engineering
    Farmacia
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Ciências biológicas iii
    Ciências biológicas i
    Ciências ambientais
    Chemical engineering (miscellaneous)
    Chemical engineering (all)
    Biotecnología
    Astronomia / física
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