Articles producció científica> Química Física i Inorgànica

Topological Changes in Telechelic Micelles: Flowers versus Stars

  • Identification data

    Identifier: imarina:9243733
    Authors:
    Baulin, Vladimir A.
    Abstract:
    The micellization and morphology of spherical telechelic micelles formed by triblock copolymers with short solvophobic end blocks at low concentrations are discussed within scaling arguments and Single Chain Mean Field Theory (SCMFT). In an ultradilute regime, individual telechelic polymer chains can exist in solution in two distinct states: an open linear chain conformation with two free ends and a closed loop conformation in which two ends are connected by the effective attraction between two solvophobic ends. At concentrations below the gelation point, closed loops tend to form micelles comprised mostly of loops in flower-like micelles, while linear polymers in open conformations tend to form star-shaped aggregates with one hydrophobic dangling end. The resulting two kinds of micelles have remarkably different topologies and dimensions, while the transition between them can be driven by the entropy, namely conformation changes between domination of the looped and linear conformations. The transition between two types of micelles lies in a narrow interaction parameters range. Thus, these topological micelles are very sensitive to the changes in the external environment, and they can serve as very sensitive stimuli responsive smart materials.
  • Others:

    Author, as appears in the article.: Baulin, Vladimir A.;
    Department: Química Física i Inorgànica
    URV's Author/s: Baulin, Vladimir
    Keywords: Thermodynamics Polymers Chain organization Bilayers thermodynamics polymers bilayers
    Abstract: The micellization and morphology of spherical telechelic micelles formed by triblock copolymers with short solvophobic end blocks at low concentrations are discussed within scaling arguments and Single Chain Mean Field Theory (SCMFT). In an ultradilute regime, individual telechelic polymer chains can exist in solution in two distinct states: an open linear chain conformation with two free ends and a closed loop conformation in which two ends are connected by the effective attraction between two solvophobic ends. At concentrations below the gelation point, closed loops tend to form micelles comprised mostly of loops in flower-like micelles, while linear polymers in open conformations tend to form star-shaped aggregates with one hydrophobic dangling end. The resulting two kinds of micelles have remarkably different topologies and dimensions, while the transition between them can be driven by the entropy, namely conformation changes between domination of the looped and linear conformations. The transition between two types of micelles lies in a narrow interaction parameters range. Thus, these topological micelles are very sensitive to the changes in the external environment, and they can serve as very sensitive stimuli responsive smart materials.
    Thematic Areas: Química Polymers and plastics Polymer science Organic chemistry Medicina veterinaria Materials chemistry Materiais Interdisciplinar Inorganic chemistry Farmacia Engenharias iii Engenharias ii Ciências biológicas i Biotecnología Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: vladimir.baulin@urv.cat
    Author identifier: 0000-0003-2086-4271
    Record's date: 2024-09-07
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://pubs.acs.org/doi/10.1021/acs.macromol.1c02395
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Macromolecules. 55 (2): 517-522
    APA: Baulin, Vladimir A.; (2022). Topological Changes in Telechelic Micelles: Flowers versus Stars. Macromolecules, 55(2), 517-522. DOI: 10.1021/acs.macromol.1c02395
    Article's DOI: 10.1021/acs.macromol.1c02395
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2022
    Publication Type: Journal Publications
  • Keywords:

    Inorganic Chemistry,Materials Chemistry,Organic Chemistry,Polymer Science,Polymers and Plastics
    Thermodynamics
    Polymers
    Chain organization
    Bilayers
    thermodynamics
    polymers
    bilayers
    Química
    Polymers and plastics
    Polymer science
    Organic chemistry
    Medicina veterinaria
    Materials chemistry
    Materiais
    Interdisciplinar
    Inorganic chemistry
    Farmacia
    Engenharias iii
    Engenharias ii
    Ciências biológicas i
    Biotecnología
    Astronomia / física
  • Documents:

  • Cerca a google

    Search to google scholar