Articles producció científica> Química Analítica i Química Orgànica

The use of lanthanide triflates in the preparation of poly(thiourethane) covalent adaptable networks

  • Dades identificatives

    Identificador: imarina:9327220
    Autors:
    Guerrero, FedericoGamardella, FrancescoRamis, XavierDe la Flor, SilviaSerra, Angels
    Resum:
    Covalent adaptable networks (CANs) are new polymeric materials with the mechanical properties of thermosets and the possibility of being recycled like thermoplastics. Poly(thiourethane) networks have demonstrated vitrimeric-like behavior at high temperatures due to the trans-thiocarbamoylation process, which Lewis acids and bases can accelerate. In this study, we report the use of lanthanide triflates (La, Sm, Dy, Er, and Yb) as Lewis acid catalysts, a greener alternative to other metallic catalysts as dibutyltin dilaurate (DBTDL) widely used in poly(urethane) and poly(thiourethane) networks. Moreover, they are not as reactive as DBTDL, and the curing mixture can be manipulated for a longer time at room temperature. As monomers, trimethylolpropane tris(3-mercapto propionate) (S3), hexamethylene diisocyanate (HDI), and isophorone diisocyanate (IPDI) have been used. We have demonstrated that the materials prepared with lanthanum triflate present the lowest relaxation times than those prepared with other lanthanide triflates or DBTDL. Calorimetry (DSC) and infrared spectroscopy (FTIR) were applied to study the curing process. The materials obtained were fully characterized by thermogravimetric analysis (TGA) and thermomechanical tests (DMA).
  • Altres:

    Autor segons l'article: Guerrero, Federico; Gamardella, Francesco; Ramis, Xavier; De la Flor, Silvia; Serra, Angels
    Departament: Enginyeria Mecànica Química Analítica i Química Orgànica
    Autor/s de la URV: De la Flor Lopez, Silvia / Gamardella, Francesco / Guerrero Ruiz, Federico / Serra Albet, Maria Angels
    Paraules clau: Ring-opening polymerization Reshapability Recyclability Poly(thiourethanes) Lanthanide triflates Covalent adaptable networks thermosets resins reshapability recyclability lanthanide triflates lactones isocyanate facile dgeba curing initiators covalent adaptable networks cationic copolymerization catalysts
    Resum: Covalent adaptable networks (CANs) are new polymeric materials with the mechanical properties of thermosets and the possibility of being recycled like thermoplastics. Poly(thiourethane) networks have demonstrated vitrimeric-like behavior at high temperatures due to the trans-thiocarbamoylation process, which Lewis acids and bases can accelerate. In this study, we report the use of lanthanide triflates (La, Sm, Dy, Er, and Yb) as Lewis acid catalysts, a greener alternative to other metallic catalysts as dibutyltin dilaurate (DBTDL) widely used in poly(urethane) and poly(thiourethane) networks. Moreover, they are not as reactive as DBTDL, and the curing mixture can be manipulated for a longer time at room temperature. As monomers, trimethylolpropane tris(3-mercapto propionate) (S3), hexamethylene diisocyanate (HDI), and isophorone diisocyanate (IPDI) have been used. We have demonstrated that the materials prepared with lanthanum triflate present the lowest relaxation times than those prepared with other lanthanide triflates or DBTDL. Calorimetry (DSC) and infrared spectroscopy (FTIR) were applied to study the curing process. The materials obtained were fully characterized by thermogravimetric analysis (TGA) and thermomechanical tests (DMA).
    Àrees temàtiques: Química Polymers and plastics Polymer science Organic chemistry Medicina ii Materials chemistry Materiais Interdisciplinar Farmacia Engenharias iv Engenharias iii Engenharias ii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Biotecnología Astronomia / física
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: angels.serra@urv.cat federico.guerrero@estudiants.urv.cat federico.guerrero@estudiants.urv.cat silvia.delaflor@urv.cat
    Identificador de l'autor: 0000-0003-1387-0358 0000-0001-7163-4068 0000-0001-7163-4068 0000-0002-6851-1371
    Data d'alta del registre: 2024-11-02
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.sciencedirect.com/science/article/pii/S003238612300592X?via%3Dihub
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Polymer. 283 126262-
    Referència de l'ítem segons les normes APA: Guerrero, Federico; Gamardella, Francesco; Ramis, Xavier; De la Flor, Silvia; Serra, Angels (2023). The use of lanthanide triflates in the preparation of poly(thiourethane) covalent adaptable networks. Polymer, 283(), 126262-. DOI: 10.1016/j.polymer.2023.126262
    DOI de l'article: 10.1016/j.polymer.2023.126262
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2023
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Materials Chemistry,Organic Chemistry,Polymer Science,Polymers and Plastics
    Ring-opening polymerization
    Reshapability
    Recyclability
    Poly(thiourethanes)
    Lanthanide triflates
    Covalent adaptable networks
    thermosets
    resins
    reshapability
    recyclability
    lanthanide triflates
    lactones
    isocyanate
    facile
    dgeba
    curing initiators
    covalent adaptable networks
    cationic copolymerization
    catalysts
    Química
    Polymers and plastics
    Polymer science
    Organic chemistry
    Medicina ii
    Materials chemistry
    Materiais
    Interdisciplinar
    Farmacia
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências agrárias i
    Biotecnología
    Astronomia / física
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