Inner Stucture of Thin Films of Lamellar Poly(styrene-b-butadiene) Diblock Copolymers as revealed by Grazing-Incidence Small-Angle Scattering

Peter Busch, Dorthe Posselt, Detlef-Matthias Smilgies, Markus Rauscher, Christine M. Papadakis

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    Resumé

    The lamellar orientation in supported, thin films of poly(styrene-b-butadiene) (P(S-b-B)) depends on block copolymer molar mass. We have studied films from nine block copolymer samples with molar masses between 13.9 and 183 kg/mol using grazing-incidence small-angle X-ray scattering (GISAXS) and have found that in low molar mass samples the lamellae are parallel to the substrate surface, whereas they are perpendicular for high molar masses. For a thick, high molar mass film, the bulk limit is approached; i.e., randomly oriented lamellae are present. The 2D GISAXS images are discussed quantitatively in the framework of our recently developed distorted-wave Born approximation model (Busch, P.; et al. J. Appl. Crystallogr. 2006, 39, 433). The results cannot be explained from enthalpic considerations alone but point to the importance of entropic factors.

    OriginalsprogEngelsk
    TidsskriftMacromolecules
    Vol/bind40
    Sider (fra-til)630-640
    Antal sider11
    ISSN0024-9297
    StatusUdgivet - 2007

    Citer dette

    Busch, Peter ; Posselt, Dorthe ; Smilgies, Detlef-Matthias ; Rauscher, Markus ; Papadakis, Christine M. / Inner Stucture of Thin Films of Lamellar Poly(styrene-b-butadiene) Diblock Copolymers as revealed by Grazing-Incidence Small-Angle Scattering. I: Macromolecules. 2007 ; Bind 40. s. 630-640.
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    title = "Inner Stucture of Thin Films of Lamellar Poly(styrene-b-butadiene) Diblock Copolymers as revealed by Grazing-Incidence Small-Angle Scattering",
    abstract = "The lamellar orientation in supported, thin films of poly(styrene-b-butadiene) (P(S-b-B)) depends on block copolymer molar mass. We have studied films from nine block copolymer samples with molar masses between 13.9 and 183 kg/mol using grazing-incidence small-angle X-ray scattering (GISAXS) and have found that in low molar mass samples the lamellae are parallel to the substrate surface, whereas they are perpendicular for high molar masses. For a thick, high molar mass film, the bulk limit is approached; i.e., randomly oriented lamellae are present. The 2D GISAXS images are discussed quantitatively in the framework of our recently developed distorted-wave Born approximation model (Busch, P.; et al. J. Appl. Crystallogr. 2006, 39, 433). The results cannot be explained from enthalpic considerations alone but point to the importance of entropic factors.",
    author = "Peter Busch and Dorthe Posselt and Detlef-Matthias Smilgies and Markus Rauscher and Papadakis, {Christine M.}",
    year = "2007",
    language = "English",
    volume = "40",
    pages = "630--640",
    journal = "Macromolecules",
    issn = "0024-9297",
    publisher = "American Chemical Society",

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    Inner Stucture of Thin Films of Lamellar Poly(styrene-b-butadiene) Diblock Copolymers as revealed by Grazing-Incidence Small-Angle Scattering. / Busch, Peter; Posselt, Dorthe; Smilgies, Detlef-Matthias; Rauscher, Markus; Papadakis, Christine M.

    I: Macromolecules, Bind 40, 2007, s. 630-640.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - Inner Stucture of Thin Films of Lamellar Poly(styrene-b-butadiene) Diblock Copolymers as revealed by Grazing-Incidence Small-Angle Scattering

    AU - Busch, Peter

    AU - Posselt, Dorthe

    AU - Smilgies, Detlef-Matthias

    AU - Rauscher, Markus

    AU - Papadakis, Christine M.

    PY - 2007

    Y1 - 2007

    N2 - The lamellar orientation in supported, thin films of poly(styrene-b-butadiene) (P(S-b-B)) depends on block copolymer molar mass. We have studied films from nine block copolymer samples with molar masses between 13.9 and 183 kg/mol using grazing-incidence small-angle X-ray scattering (GISAXS) and have found that in low molar mass samples the lamellae are parallel to the substrate surface, whereas they are perpendicular for high molar masses. For a thick, high molar mass film, the bulk limit is approached; i.e., randomly oriented lamellae are present. The 2D GISAXS images are discussed quantitatively in the framework of our recently developed distorted-wave Born approximation model (Busch, P.; et al. J. Appl. Crystallogr. 2006, 39, 433). The results cannot be explained from enthalpic considerations alone but point to the importance of entropic factors.

    AB - The lamellar orientation in supported, thin films of poly(styrene-b-butadiene) (P(S-b-B)) depends on block copolymer molar mass. We have studied films from nine block copolymer samples with molar masses between 13.9 and 183 kg/mol using grazing-incidence small-angle X-ray scattering (GISAXS) and have found that in low molar mass samples the lamellae are parallel to the substrate surface, whereas they are perpendicular for high molar masses. For a thick, high molar mass film, the bulk limit is approached; i.e., randomly oriented lamellae are present. The 2D GISAXS images are discussed quantitatively in the framework of our recently developed distorted-wave Born approximation model (Busch, P.; et al. J. Appl. Crystallogr. 2006, 39, 433). The results cannot be explained from enthalpic considerations alone but point to the importance of entropic factors.

    M3 - Journal article

    VL - 40

    SP - 630

    EP - 640

    JO - Macromolecules

    JF - Macromolecules

    SN - 0024-9297

    ER -