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    Noncovalent Supramolecular Diblock Copolymers: Synthesis and Microphase Separation

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    acs.macromol.9b02326.pdf
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    Type
    Article
    Authors
    Bhaumik, Saibal cc
    Ntetsikas, Konstantinos cc
    Hadjichristidis, Nikos cc
    KAUST Department
    Chemical Science Program
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Polymer Synthesis Laboratory
    Date
    2020-07-22
    Online Publication Date
    2020-07-22
    Print Publication Date
    2020-08-11
    Submitted Date
    2019-11-05
    Permanent link to this record
    http://hdl.handle.net/10754/664371
    
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    Abstract
    Supramolecular block copolymers (PS-DAT-sb-PI-Thy) were synthesized via noncovalent hydrogen bonding between well-defined thymine end-functionalized polyisoprene (PI-Thy) and diaminotriazine (DAT) end-functionalized polystyrene (PS-DAT). Three covalently linked block copolymers were also synthesized for comparison with the noncovalent supramolecular block copolymers. The complementary DAT/Thy interaction resulted in the microphase separation of the supramolecular block copolymer system. Detailed characterization of all functionalized homopolymers and block copolymers was carried out via proton nuclear magnetic resonance (1H NMR) spectroscopy, gel permeation chromatography, matrix-assisted laser desorption/ionizationtime of flight mass spectrometry, and differential scanning calorimetry. The self-assembly process of supramolecular block copolymers was evidenced by transmission electron microscopy. Small-angle X-ray scattering was also performed to study the microphase separation of supramolecular and covalently linked block copolymers. Comparison of microphase separation images of supramolecular block copolymers and the corresponding covalently linked analogues reveals differences in d-spacing and microdomain shape.
    Citation
    Bhaumik, S., Ntetsikas, K., & Hadjichristidis, N. (2020). Noncovalent Supramolecular Diblock Copolymers: Synthesis and Microphase Separation. Macromolecules. doi:10.1021/acs.macromol.9b02326
    Sponsors
    The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). The authors are grateful to Professors Edwin Thomas (Rice University, USA) and George Floudas (University of Ioannina, Greece) for the SAXS measurements and discussions, as well as to Dr. George Zapsas for assisting in recording the TEM images.
    Publisher
    American Chemical Society (ACS)
    Journal
    Macromolecules
    DOI
    10.1021/acs.macromol.9b02326
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.macromol.9b02326
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.macromol.9b02326
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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