Articles producció científica> Química Analítica i Química Orgànica

Recyclable organocatalyzed poly(Thiourethane) covalent adaptable networks

  • Identification data

    Identifier: imarina:9138962
    Authors:
    Gamardella, FrancescoMunoz, SaraDe la Flor, SilviaRamis, XavierSerra, Angels
    Abstract:
    © 2020 by the authors. Licensee MDPI, Basel, Switzerland. A new type of tetraphenylborate salts derived from highly basic and nucleophilic amines, namely 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 1,8-diazabicyclo(5.4.0)undec-7-ene (DBU) and triazabicyclodecene (TBD), was applied to the preparation of networked poly(thiourethane)s (PTUs), which showed a vitrimer-like behavior, with higher stress-relaxation rates than PTUs prepared by using dibutyl thin dilaurate (DBTDL) as the catalyst. The use of these salts, which release the amines when heated, instead of the pure amines, allows the formulation to be easily manipulated to prepare any type of samples. The materials prepared from stoichiometric mixtures of hexamethylene diisocyanate (HDI), trithiol (S3) and with a 10% of molar excess of isocyanate or thiol were characterized by FTIR, thermomechanical analysis, thermogravimetry, stress-relaxation tests and tensile tests, thus obtaining a complete thermal and mechanical characterization of the materials. The recycled materials obtained by grinding the original PTUs and hot-pressing the small pieces in the optimized time and temperature conditions were fully characterized by mechanical, thermomechanical and FTIR studies. This allowed us to confirm their recyclability, without appreciable changes in the network structure and performance. From several observations, the dissociative interchange trans-thiocarbamoylation mechanism was evidenced as the main responsible of the topological rearrangements at high temperature, resulting in a vitrimeric-like behavior.
  • Others:

    Author, as appears in the article.: Gamardella, Francesco; Munoz, Sara; De la Flor, Silvia; Ramis, Xavier; Serra, Angels
    Department: Química Analítica i Química Orgànica Enginyeria Mecànica
    e-ISSN: 2073-4360
    URV's Author/s: De la Flor Lopez, Silvia / Gamardella, Francesco / MUÑOZ MAGALLON, SUSANA / Serra Albet, Maria Angels
    Keywords: Vitrimers Thermosets Recyclability Poly(thiourethane) Organocatalyst Covalent adaptable networks
    Abstract: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. A new type of tetraphenylborate salts derived from highly basic and nucleophilic amines, namely 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 1,8-diazabicyclo(5.4.0)undec-7-ene (DBU) and triazabicyclodecene (TBD), was applied to the preparation of networked poly(thiourethane)s (PTUs), which showed a vitrimer-like behavior, with higher stress-relaxation rates than PTUs prepared by using dibutyl thin dilaurate (DBTDL) as the catalyst. The use of these salts, which release the amines when heated, instead of the pure amines, allows the formulation to be easily manipulated to prepare any type of samples. The materials prepared from stoichiometric mixtures of hexamethylene diisocyanate (HDI), trithiol (S3) and with a 10% of molar excess of isocyanate or thiol were characterized by FTIR, thermomechanical analysis, thermogravimetry, stress-relaxation tests and tensile tests, thus obtaining a complete thermal and mechanical characterization of the materials. The recycled materials obtained by grinding the original PTUs and hot-pressing the small pieces in the optimized time and temperature conditions were fully characterized by mechanical, thermomechanical and FTIR studies. This allowed us to confirm their recyclability, without appreciable changes in the network structure and performance. From several observations, the dissociative interchange trans-thiocarbamoylation mechanism was evidenced as the main responsible of the topological rearrangements at high temperature, resulting in a vitrimeric-like behavior.
    Thematic Areas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: angels.serra@urv.cat silvia.delaflor@urv.cat
    Author identifier: 0000-0003-1387-0358 0000-0002-6851-1371
    Record's date: 2024-11-02
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.mdpi.com/2073-4360/12/12/2913
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Polymers. 12 (12): 1-18
    APA: Gamardella, Francesco; Munoz, Sara; De la Flor, Silvia; Ramis, Xavier; Serra, Angels (2020). Recyclable organocatalyzed poly(Thiourethane) covalent adaptable networks. Polymers, 12(12), 1-18. DOI: 10.3390/polym12122913
    Article's DOI: 10.3390/polym12122913
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2020
    Publication Type: Journal Publications
  • Keywords:

    Chemistry (Miscellaneous),Polymer Science,Polymers and Plastics
    Vitrimers
    Thermosets
    Recyclability
    Poly(thiourethane)
    Organocatalyst
    Covalent adaptable networks
    Polymers and plastics
    Polymer science
    Odontología
    General chemistry
    Farmacia
    Engenharias ii
    Ciências biológicas ii
    Chemistry (miscellaneous)
    Chemistry (all)
    Biotecnología
    Astronomia / física
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