Lamellar Microdomains of Block-Copolymer-Based Ionic Supramolecules Exhibiting a Hierarchical Self-Assembly

Mehran Asad Ayoubi, Kristoffer Almdal, Kaizheng Zhu, Bo Nystrom, Ulf Olsson, Lennart Piculell

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Based on a parent diblock copolymer of poly(styrene)-b-poly(methacrylic acid), PS-b-PMAA, linear-b-amphiphilic comb (L-b-AC) ionic supramolecules [Soft Matter 2013, 9, 1540-1555] are synthesized in which the poly(methacrylate) backbone of the ionic supramolecular AC-block is neutralized by alkyl (Cn; n = 8, 12, and 16) trimethylammonium counterions (i.e., side chains) at various ion (pair) fractions X [i.e., counterion/side-chain grafting density; X = number of alkyl counterions (i.e., side chains) per acidic group of the parent PMAA block] these L-b-AC ionic supramolecules exhibit a spherical-in-lamellar hierarchical self-assembly. For these systems, (1) the effective Flory-Huggins interaction parameter between L- and AC-blocks chi'(Cn/x) was extracted, and (2) analysis of the lamellar microdomains showed that when there is an increase in X, alkyl counterion (i.e., side chain) length l(sc), or both, there is an increase in both the average interfacial area per block junction Sigma and the thickness of the microlayer of the AC-block d(Ac).
    Original languageEnglish
    JournalMacromolecules
    Volume47
    Issue number10
    Pages (from-to)3428-3435
    ISSN0024-9297
    DOIs
    Publication statusPublished - 2014

    Keywords

    • POLYMER
    • COMB-COIL COMPLEXES
    • DIBLOCK COPOLYMERS
    • PHASE-BEHAVIOR
    • STRONG SEGREGATION
    • DODECYLBENZENESULFONIC ACID
    • MICROPHASE SEPARATION
    • IMMISCIBLE POLYMERS
    • ELECTROSPUN FIBERS
    • STAR COPOLYMER
    • LENGTH SCALES
    • Block copolymers
    • Chains
    • Polyacrylates
    • Self assembly
    • Styrene
    • Acidic groups
    • Flory-Huggins interaction parameter
    • Grafting densities
    • Hierarchical self-assembly
    • Interfacial areas
    • Lamellar microdomains
    • Methacrylic acids
    • Supramolecules
    • Ions

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