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Controlled composite processing based on off-stoichiometric thiol-epoxy dual-curing systems with sequential heat release (SHR)

  • Datos identificativos

    Identificador: imarina:9241739
    Autores:
    Fabregat-Sanjuan, AlbertFernandez-Francos, XavierFerrando-Piera, Francesc
    Resumen:
    Control of curing rate and exothermicity during processing of thermosetting composite materials is essential in order to minimize the formation of internal stresses leading to mechanical and dimensional defects in the samples, especially in thick composite samples. It was recently proposed that sequential heat release, an approach based on the kinetic control of the curing sequence of dual-curing thermosets, would enable a step-wise release of the reaction heat and therefore a better control of conversion and temperature profiles during the crosslinking stage. In this article, it is shown experimental proof of this concept obtained by means of an instrumented mold that can be used for the processing of small samples with and without carbon fiber reinforcement. Safe processing scenarios have been defined by numerical simulation using a simplified two-dimensional heat transfer model and validated experimentally.
  • Otros:

    Autor según el artículo: Fabregat-Sanjuan, Albert; Fernandez-Francos, Xavier; Ferrando-Piera, Francesc;
    Departamento: Enginyeria Mecànica
    Autor/es de la URV: Fabregat Sanjuan, Albert / Fernández Francos, Xavier
    Palabras clave: Thermosetting composites Thermosets Thermal properties Temperature Structure-property relationships Structure-properties relationships Stresses Optimization Kinetics Heat transfer Heat release Exothermicity Epoxy Dual curing Curing system Curing rates Curing Cure Crosslinking Composites material Composites Composite processing Carbon fibers
    Resumen: Control of curing rate and exothermicity during processing of thermosetting composite materials is essential in order to minimize the formation of internal stresses leading to mechanical and dimensional defects in the samples, especially in thick composite samples. It was recently proposed that sequential heat release, an approach based on the kinetic control of the curing sequence of dual-curing thermosets, would enable a step-wise release of the reaction heat and therefore a better control of conversion and temperature profiles during the crosslinking stage. In this article, it is shown experimental proof of this concept obtained by means of an instrumented mold that can be used for the processing of small samples with and without carbon fiber reinforcement. Safe processing scenarios have been defined by numerical simulation using a simplified two-dimensional heat transfer model and validated experimentally.
    Áreas temáticas: Surfaces, coatings and films Química Polymers and plastics Polymer science Odontología Nutrição Medicina ii Medicina i Materials chemistry Materiais Interdisciplinar Geociências General chemistry Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    Direcció de correo del autor: xavier.fernandez@urv.cat a.fabregat@urv.cat
    Identificador del autor: 0000-0002-3492-2922 0000-0002-2878-1369
    Fecha de alta del registro: 2024-09-07
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://onlinelibrary.wiley.com/doi/full/10.1002/app.52009
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Journal Of Applied Polymer Science. 139 (17):
    Referencia de l'ítem segons les normes APA: Fabregat-Sanjuan, Albert; Fernandez-Francos, Xavier; Ferrando-Piera, Francesc; (2022). Controlled composite processing based on off-stoichiometric thiol-epoxy dual-curing systems with sequential heat release (SHR). Journal Of Applied Polymer Science, 139(17), -. DOI: 10.1002/app.52009
    DOI del artículo: 10.1002/app.52009
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2022
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Chemistry (Miscellaneous),Materials Chemistry,Polymer Science,Polymers and Plastics,Surfaces, Coatings and Films
    Thermosetting composites
    Thermosets
    Thermal properties
    Temperature
    Structure-property relationships
    Structure-properties relationships
    Stresses
    Optimization
    Kinetics
    Heat transfer
    Heat release
    Exothermicity
    Epoxy
    Dual curing
    Curing system
    Curing rates
    Curing
    Cure
    Crosslinking
    Composites material
    Composites
    Composite processing
    Carbon fibers
    Surfaces, coatings and films
    Química
    Polymers and plastics
    Polymer science
    Odontología
    Nutrição
    Medicina ii
    Medicina i
    Materials chemistry
    Materiais
    Interdisciplinar
    Geociências
    General chemistry
    Farmacia
    Ensino
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Engenharias i
    Ciências biológicas iii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Ciência de alimentos
    Ciência da computação
    Chemistry (miscellaneous)
    Chemistry (all)
    Biotecnología
    Astronomia / física
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