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    Ultrafast phosphazene-promoted controlled anionic polymerization of styrenic monomers

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    Type
    Article
    Authors
    Ntetsikas, Konstantinos
    Polymeropoulos, Georgios
    Zapsas, Georgios
    Bilalis, Panagiotis cc
    Gnanou, Yves cc
    Hadjichristidis, Nikos cc
    KAUST Department
    Chemical Science Program
    KAUST Catalysis Center (KCC)
    Office of the VP
    Physical Science and Engineering (PSE) Division
    Polymer Synthesis Laboratory
    Date
    2018-10-29
    Online Publication Date
    2018-10-29
    Print Publication Date
    2019-02
    Permanent link to this record
    http://hdl.handle.net/10754/630590
    
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    Abstract
    The anionic polymerization of styrenic monomers with phosphazene bases as promoters, utilizing “seeding” technique in a nonpolar solvent and at room temperature was studied. In all experiments, the phosphazene base (t-BuP4, t-BuP2, and t-BuP1) was added in an equimolar amount to the organolithium initiator after the formation of oligomers (2 min) by conventional anionic polymerization. When t-BuP4 was used, the polymerization of styrene and 4-methylstyrene was extremely fast (100 % conversion within 5 min) and the final homopolymers exhibited narrow molecular weight distribution and controlled molecular characteristics. Likewise, when weaker bases were employed, the polymerization was also controlled but showing slower reaction rate. To examine the “livingness” of this system, block copolymers were synthesized by sequential monomer addition. Further studies were conducted in order to extend this novel method to the anionic polymerization of dienes.
    Citation
    Ntetsikas K, Polymeropoulos G, Zapsas G, Bilalis P, Gnanou Y, et al. (2018) Ultrafast phosphazene-promoted controlled anionic polymerization of styrenic monomers. Journal of Polymer Science Part A: Polymer Chemistry 57: 456–464. Available: http://dx.doi.org/10.1002/pola.29258.
    Sponsors
    Research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).
    Publisher
    Wiley
    Journal
    Journal of Polymer Science Part A: Polymer Chemistry
    DOI
    10.1002/pola.29258
    Additional Links
    https://onlinelibrary.wiley.com/doi/full/10.1002/pola.29258
    ae974a485f413a2113503eed53cd6c53
    10.1002/pola.29258
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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