Berlin 2018 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 66: Poster: Stat. Phys. (Gen., Critical Phen., Biol.)

DY 66.14: Poster

Donnerstag, 15. März 2018, 15:30–18:00, Poster A

Conformational dynamics of growing polymers under non-stationary conditions — •Jörn H. Appeldorn, Ali Malek, and Reiner Kree — Inst. f. Theoret. Physik, Univ. Göttingen, Friedrich-Hund. Pl. 1, 37077 Göttingen

The time scales of conformational evolution of a poylmer chain and of ongoing polymerization reactions may become comparable for living polymers and for biopolymer reactions. In particular this happens under non-stationary conditions, if the polymerization velocity decreases, for example due to depletion of monomers or activators. We extend both the Rouse model and the dynamical model of a semi-flexible chain in the approximation of constant average line tension to include instationary growth with velocities decreasing as t^−γ. We demonstrate and discuss the appearance of well-defined dynamical transitions in a dragged chain and in a chain in homogeneous shear flow, which are signalled by sudden, qualitative changes in conformational or rheological properties as functions of γ.