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首页> 外文期刊>ACS Macro Letters >Bottlebrush Copolymer as Surface Neutralizer for Vertical Alignment of Block Copolymer Nanodomains in Thin Films
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Bottlebrush Copolymer as Surface Neutralizer for Vertical Alignment of Block Copolymer Nanodomains in Thin Films

机译：薄膜中嵌段共聚物纳米膜垂直对准的瓶颈共聚物作为表面中和剂

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摘要

Herein we designed bottlebrush copolymers for use as a neutral additive to block copolymer (BCP) thin films in which they are segregated to the interfaces via architectural effects and produce nonpreferential interfaces to induce perpendicular orientation of BCP microdomains. Two BCP systems were employed, a conventional poly(styrene-b-methyl methacrylate) (PS-b-PMMA) with relatively low chi and similar surface energies between blocks, and a high chi poly(styrene-b-methacrylic acid) (PS-b-PMAA) with distinct surface energies. The bottlebrushes, with either short side-chains of PS-r-PMMA or PS-r-PMAA random copolymers, were synthesized via ring-opening metathesis polymerization (ROMP). Remarkably, it was observed that the top and bottom interfaces of both BCP films were enriched with bottlebrush copolymers, regardless of the surface energy difference between blocks, hence, vertically oriented microdomains were achieved for both BCP systems. This can be attributed to the screening of polymer interactions by a good solvent during the spin-casting process, allowing architectural effects to play a role in surface segregation of bottlebrush copolymers, as confirmed by contact angle measurements and time-of-flight secondary ion mass spectroscopy (TOF-SIMS). We believe that this concept can be further extended to various applications that require polymer films with functional surfaces.
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  • 来源
    《ACS Macro Letters》 |2021年第3期|共8页
  • 作者

    Kim Ki Hyun; Kim Mincheol; Moon Junsoo; Huh June; Bang Joona;

  • 作者单位

    Korea Univ Dept Chem &

    Biol Engn Seoul 02841 South Korea;

    Korea Univ Dept Chem &

    Biol Engn Seoul 02841 South Korea;

    Korea Univ Dept Chem &

    Biol Engn Seoul 02841 South Korea;

    Korea Univ Dept Chem &

    Biol Engn Seoul 02841 South Korea;

    Korea Univ Dept Chem &

    Biol Engn Seoul 02841 South Korea;

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  • 正文语种 eng
  • 中图分类 有机化学;
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