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    Hydrophilic Stars, Amphiphilic Star Block Copolymers, and Miktoarm Stars with Degradable Polycarbonate Cores

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    Type
    Article
    Authors
    Augustine, Dhanya
    Hadjichristidis, Nikos cc
    Gnanou, Yves cc
    Feng, Xiaoshuang
    KAUST Department
    Academic Affairs
    Chemical Science Program
    KAUST Catalysis Center (KCC)
    Office of the VP
    Physical Science and Engineering (PSE) Division
    Polymer Synthesis Laboratory
    KAUST Grant Number
    BAS/1/1374-01-01
    Date
    2020-01-30
    Online Publication Date
    2020-01-30
    Print Publication Date
    2020-02-11
    Embargo End Date
    2021-01-30
    Submitted Date
    2019-12-16
    Permanent link to this record
    http://hdl.handle.net/10754/661351
    
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    Abstract
    A facile one-pot synthetic approach toward the realization of star polymers made of degradable carbonate cores is reported. The synthetic strategy involved triethylborane-activated anionic copolymerization of a difunctional epoxide with CO2 initiated by bis(triphenylphosphine)iminium chloride (PPNCl).Vinyl cyclohexene dioxide (VCD) was, thus, used as a difunctional cross-linker, and core compositions with 80−90% carbonate content were achieved. Poly(ethylene oxide) (PEO) arms were grown from these in-situ generated polycarbonate core anions to build a range of star polymers, including hydrophilic PEO stars and star-shaped block copolymers. Poly(propylene oxide) (PPO) precursors were used in a second approach as macroinitiators to form carbonate cores through the arm-first method; miktoarm stars having a large number of arms, both hydrophilic and hydrophobic, could be derived by this method. The carbonate cores of the synthesized stars were readily degraded through hydrolysis of the core carbonate linkages to yield PEO and PPO chains. Potential applications of these types of systems are manifold, especially for PEGbased drug delivery vehicles.
    Citation
    Augustine, D., Hadjichristidis, N., Gnanou, Y., & Feng, X. (2020). Hydrophilic Stars, Amphiphilic Star Block Copolymers, and Miktoarm Stars with Degradable Polycarbonate Cores. Macromolecules. doi:10.1021/acs.macromol.9b02658
    Sponsors
    This research work was supported by KAUST under baseline funding (BAS/1/1374-01-01).
    Publisher
    American Chemical Society (ACS)
    Journal
    Macromolecules
    DOI
    10.1021/acs.macromol.9b02658
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.macromol.9b02658
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.macromol.9b02658
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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