Regensburg 2010 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 31: Poster: Polymer Dynamics

CPP 31.16: Poster

Mittwoch, 24. März 2010, 17:30–19:00, Poster C

Relaxation processes of ABA type block copolymers due to chemical confinement — •Moritz Schwabe and Konrad Samwer — Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

It was shown that block copolymers can have an additional relaxation mode, which is localized in the temperature range between the γ-relaxation and a softening of the system. This mode is discussed as a flipping of new short segments, produced by additional hydrogen bonds (chemical confinement). [1] In this work we systematical determined ABA-block copolymers with dynamic-mechanical analysis to their relaxation modes with a main focus on a chemical confinement due to hydrogen bonds. We could identify three different relaxation modes, whereby two modes seemed to depend on the length of the inner B-block and one of the outer A-blocks. We thank the SFB 602 and the GRK 782 for financial supporting. [1] J. Hachenberg, B. Steisel, U. Nergui, D. Bedorf, M. Buback, K. Samwer, International journal of materials, 2008, 99, 5, 502-506