Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 35: Activated and Glassy Dynamics of Soft Matter (joint session CPP/DY, organized by CPP)

CPP 35.10: Vortrag

Mittwoch, 9. März 2016, 12:15–12:30, H51

Supramolecular association in transiently branched polymer systems — •Mariapaola Staropoli, Claas Hoevelmann, Juergen Allgaier, Andreas Raba, Wim Pyckhout-Hintzen, Andreas Wischnewski, and Dieter Richter — JCNS-1 Forschungzentrum Juelich

In this contribution, the investigation of hydrogen bonding mechanism in a transiently branched comb-like polymer system, is presented. The system under investigation consists of a polybutylene oxide (PBO) based backbone, randomly functionalized with thymine (Thy) groups, in combination with shorter PBO chains, end functionalized with Diaminotriazine (Dat) groups. The functional groups are able to associate through hydrogen bonds. The complementary association of these groups leads to the formation of a transiently branched comb-like polymer system. The interaction of hydrogen bonding groups in the melt state has been studied on microscopic level by Small Angle Neutron Scattering technique (SANS), by mean of the selective labeling scheme.A peak observed in the scattering function, reveals the formation of a block copolymer, due to the complementary association of the hydrogen bonding groups. The scattering profile of a block copolymer is described by mean of RPA formalism through which it is possible to obtain an average aggregation number in the melt and thus, the association constant. Rheological measurements in the melt have been performed in order to study the influence of the transient bonds on the macroscopic properties of the polymer system and to analyze the effect of the reversible interaction on the dynamic.