Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Poster Session 2

CPP 37.71: Poster

Mittwoch, 2. April 2014, 15:00–19:00, P3

Tagged Chain Rotational Dynamics of Segments in Entangled Polymers — •Marie-Luise Trutschel, Anton Mordvinkin, and Kay Saalwächter — Institut für Physik - NMR, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany

We used simple NMR techniques to probe the dynamics of entangled polymer chains. We measured the orientational autocorrelation function (OACF) for different molecular weights of polybutadiene (tagged chain) in bulk and diluted in deuterated matrix of polymers of variable molecular weight in order to investigate the influence of constraint release processes. Earlier work concentrated on the dynamics in regime II-IV [1, 2, 3], while an extension of our technique allows us to reach regime I. The transition from regime I to II will be studied and compared with the value of τ_e known from theory.

[1] Vaca Chávez, Saalwächter, PRL 104, 198305, 2010.

[2] Vaca Chávez, Saalwächter, Macromolecules 44, 1549-1559, 2011

[3] Furtado et al., Macromolecules, 2014, DOI: 10.1021/ma4021938