Articles producció científica> Química Analítica i Química Orgànica

Molecular mobility and dielectric properties of dendronized side chain liquid crystalline polyamines with benzoate groups as lateral spacers

  • Datos identificativos

    Identificador: imarina:9437266
    Autores:
    Montane, XavierGraf, RobertPascual-Jose, BorjaTeruel-Juanes, RobertoGuardia, JordiGiamberini, MartaReina, Jose AntonioRibes-Greus, Amparo
    Resumen:
    Dendronized polymers are suitable candidates for the preparation of biomimetic membranes for ion transport in fuel cells, which is nowadays a sustainable way of producing electrical energy. To prepare materials for these high-technology applications, it is necessary to understand the role of the different parts that make up these supramolecular structures. Another key factor is optimizing the preparation processes to ensure the materials achieve their maximum performance potential. Following these premises, in this work we report on the characterization of side chain liquid crystalline polyamines synthesized by chemical modification of poly[2-(aziridin1-yl)ethanol] (PAZE) with lateral benzoate groups and the dendron 3,4,5-tris[4-(n-dodecan-1-yloxy)benzyloxy] benzoate (TAP) by using the following techniques: liquid and solid-state Nuclear Magnetic Resonance (NMR), Differential Scanning Calorimetry (DSC), Polarized Optical Microscopy (POM) and Dielectric Thermal Analysis (DETA). This in-depth investigation allowed us to understand the effect of parameters that could influence the organization of the different parts of the resulting supramolecular structures and their dynamics: introduction of benzoate lateral spacers, grafting with different amounts of TAP mesogenic group, and the thermal treatment used in the orientation of the polymer chains. NMR investigations confirmed that the melting of both copolyamines took place thanks to the mobility gained by the aliphatic tails of the TAP dendron between 256 and 272 K. Furthermore, the evaluation of variable temperature 13 C solid-state NMR experiments proved that the clearing transition was related to the aromatic moieties of these polyamines. DETA studies of oriented and non-oriented membranes corroborated that the applicati
  • Otros:

    Autor según el artículo: Montane, Xavier; Graf, Robert; Pascual-Jose, Borja; Teruel-Juanes, Roberto; Guardia, Jordi; Giamberini, Marta; Reina, Jose Antonio; Ribes-Greus, Amparo
    Departamento: Química Analítica i Química Orgànica
    Autor/es de la URV: Giamberini, Marta / Guardià Blanch, Jordi / Montané Montané, Xavier / Reina Lozano, José Antonio
    Palabras clave: Benzoate spacers Biomimetic membranes Columnar mesophases Derivatives Design Dielectric relaxation spectr Dielectric relaxation spectra Dynamic molecular mobility Famil Ion-conducting membranes Polymers Side chain liquid crystalline polyamines Transport
    Resumen: Dendronized polymers are suitable candidates for the preparation of biomimetic membranes for ion transport in fuel cells, which is nowadays a sustainable way of producing electrical energy. To prepare materials for these high-technology applications, it is necessary to understand the role of the different parts that make up these supramolecular structures. Another key factor is optimizing the preparation processes to ensure the materials achieve their maximum performance potential. Following these premises, in this work we report on the characterization of side chain liquid crystalline polyamines synthesized by chemical modification of poly[2-(aziridin1-yl)ethanol] (PAZE) with lateral benzoate groups and the dendron 3,4,5-tris[4-(n-dodecan-1-yloxy)benzyloxy] benzoate (TAP) by using the following techniques: liquid and solid-state Nuclear Magnetic Resonance (NMR), Differential Scanning Calorimetry (DSC), Polarized Optical Microscopy (POM) and Dielectric Thermal Analysis (DETA). This in-depth investigation allowed us to understand the effect of parameters that could influence the organization of the different parts of the resulting supramolecular structures and their dynamics: introduction of benzoate lateral spacers, grafting with different amounts of TAP mesogenic group, and the thermal treatment used in the orientation of the polymer chains. NMR investigations confirmed that the melting of both copolyamines took place thanks to the mobility gained by the aliphatic tails of the TAP dendron between 256 and 272 K. Furthermore, the evaluation of variable temperature 13 C solid-state NMR experiments proved that the clearing transition was related to the aromatic moieties of these polyamines. DETA studies of oriented and non-oriented membranes corroborated that the application of the thermal treatment increased the temperatures of the detected transitions: gamma- relaxation, alpha Tg and alpha Clear . The results obtained demonstrated that the adjustment of the aforementioned parameters is essential for designing membranes intended for ion transport applications.
    Áreas temáticas: Astronomia / física Biotecnología Ciência de alimentos Ciências agrárias i Ciências ambientais Ciências biológicas iii Engenharias i Engenharias ii Engenharias iii Engenharias iv Interdisciplinar Materiais Materials science, characterization & testing Medicina i Medicina ii Odontología Organic chemistry Polymer science Polymers and plastics Química
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    Direcció de correo del autor: joseantonio.reina@urv.cat marta.giamberini@urv.cat jordi.guardia@alumni.urv.cat xavier.montane@urv.cat
    Identificador del autor: 0000-0002-9245-4135 0000-0001-8278-3552 0000-0003-1345-3140 0000-0002-1426-239X
    Fecha de alta del registro: 2025-02-24
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Referencia al articulo segun fuente origial: Polymer Testing. 142 108658-
    Referencia de l'ítem segons les normes APA: Montane, Xavier; Graf, Robert; Pascual-Jose, Borja; Teruel-Juanes, Roberto; Guardia, Jordi; Giamberini, Marta; Reina, Jose Antonio; Ribes-Greus, Ampar (2025). Molecular mobility and dielectric properties of dendronized side chain liquid crystalline polyamines with benzoate groups as lateral spacers. Polymer Testing, 142(), 108658-. DOI: 10.1016/j.polymertesting.2024.108658
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2025
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Materials Science, Characterization & Testing,Organic Chemistry,Polymer Science,Polymers and Plastics
    Benzoate spacers
    Biomimetic membranes
    Columnar mesophases
    Derivatives
    Design
    Dielectric relaxation spectr
    Dielectric relaxation spectra
    Dynamic molecular mobility
    Famil
    Ion-conducting membranes
    Polymers
    Side chain liquid crystalline polyamines
    Transport
    Astronomia / física
    Biotecnología
    Ciência de alimentos
    Ciências agrárias i
    Ciências ambientais
    Ciências biológicas iii
    Engenharias i
    Engenharias ii
    Engenharias iii
    Engenharias iv
    Interdisciplinar
    Materiais
    Materials science, characterization & testing
    Medicina i
    Medicina ii
    Odontología
    Organic chemistry
    Polymer science
    Polymers and plastics
    Química
  • Documentos:

  • Cerca a google

    Search to google scholar