Počet záznamů: 1

Structure of self-organized diblock copolymer solutions in partially miscible solvents

  1. 1.
    0341672 - UMCH-V 2011 RIV GB eng J - Článek v odborném periodiku
    Štěpánek, Petr - Tuzar, Zdeněk - Kadlec, Petr - Nallet, F. - da Silveira, N. P.
    Structure of self-organized diblock copolymer solutions in partially miscible solvents.
    Physical Chemistry Chemical Physics. Roč. 12, č. 12 (2010), s. 2944-2949 ISSN 1463-9076
    Grant CEP: GA ČR GESON/06/E005
    Výzkumný záměr: CEZ:AV0Z40500505
    Klíčová slova: small-angle neutron scattering * body-centered-cubic phase * shear
    Kód oboru RIV: CD - Makromolekulární chemie
    Impakt faktor: 3.454, rok: 2010

    A diblock copolymer dissolved in a mixture of partially miscible solvents creates a self-organized microemulsion with a morphology that depends on the numerous parameters of the system. We discuss one particular case of spherical particles forming a hard gel with cubic. We extract from the data the one- and two-dimensional structure factors, S(q) and S(q,phi). The experimental S(q) corresponds up to the 9th order Bragg peak to that calculated numerically for a randomly-oriented, finite-size BCC crystal. The concentration dependence of the structural parameters reveals that the dilution law predicted for the center-to-center distance of the spheres is confirmed experimentally while the size of the spherical objects does not follow theoretical predictions due to chain extension with increasing concentration.
    Trvalý link: http://hdl.handle.net/11104/0184580