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

0341672 - ÚMCH 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. E-ISSN 1463-9084
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