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    Diblock copolymers of polystyrene-b-poly(1,3-cyclohexadiene) exhibiting unique three-phase microdomain morphologies

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    Type
    Article
    Authors
    Misichronis, Konstantinos cc
    Chen, Jihua
    Kahk, Jong K.
    Imel, Adam
    Dadmun, Mark cc
    Hong, Kunlun cc
    Hadjichristidis, Nikos cc
    Mays, Jimmy W.
    Avgeropoulos, Apostolos cc
    KAUST Department
    Chemical Science Program
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Polymer Synthesis Laboratory
    Date
    2016-03-29
    Online Publication Date
    2016-03-29
    Print Publication Date
    2016-08-15
    Permanent link to this record
    http://hdl.handle.net/10754/621697
    
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    Abstract
    The synthesis and molecular characterization of a series of conformationally asymmetric polystyrene-block-poly(1,3-cyclohexadiene) (PS-b-PCHD) diblock copolymers (PCHD: ∼90% 1,4 and ∼10% 1,2), by sequential anionic copolymerization high vacuum techniques, is reported. A wide range of volume fractions (0.27≤ϕPS≤0.91) was studied by transmission electron microscopy and small-angle X-ray scattering in order to explore in detail the microphase separation behavior of these flexible/semiflexible diblock copolymers. Unusual morphologies, consisting of PCHD core(PCHD-1,4)-shell(PCHD-1,2) cylinders in PS matrix and three-phase (PS, PCHD-1,4, PCHD-1,2) four-layer lamellae, were observed suggesting that the chain stiffness of the PCHD block and the strong dependence of the interaction parameter χ on the PCHD microstructures are important factors for the formation of this unusual microphase separation behavior in PS-b-PCHD diblock copolymers. © 2016 Wiley Periodicals, Inc.
    Citation
    Misichronis K, Chen J, Kahk JK, Imel A, Dadmun M, et al. (2016) Diblock copolymers of polystyrene-b-poly(1,3-cyclohexadiene) exhibiting unique three-phase microdomain morphologies. J Polym Sci Part B: Polym Phys 54: 1564–1572. Available: http://dx.doi.org/10.1002/polb.24050.
    Sponsors
    This work was supported by the Materials Science and Engineering Division, U.S. Department of Energy (DoE), Office of Basic Energy Sciences (BES) under contract No. DEAC05-00OR22725 with UT-Battelle, LLC at Oak Ridge National Laboratory (ORNL). Part of the research was done at the Center for Nanophase Materials Sciences, which is sponsored by the Scientific User Facilities Division of DoE through a user project to J. W. Mays. A. Avgeropoulos also thank the nuclear magnetic resonance spectroscopy and the electron microscopy facilities of the University of Ioannina. The research reported in this publication was partially supported by funding from King Abdullah University of Science and Technology (KAUST).
    Publisher
    Wiley
    Journal
    Journal of Polymer Science Part B: Polymer Physics
    DOI
    10.1002/polb.24050
    Additional Links
    http://onlinelibrary.wiley.com/doi/10.1002/polb.24050/full
    https://www.osti.gov/biblio/1319226
    ae974a485f413a2113503eed53cd6c53
    10.1002/polb.24050
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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