Regensburg 2002 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 16: Polymere Netzwerke und Polymere mit besonderer Architektur

CPP 16.4: Talk

Thursday, March 14, 2002, 10:20–10:40, H38

Investigation of Starlike Polymers in High Molecular Solvent by Small Angle Neutron Scattering — •Markus Wolkenhauer¹, Manfred Stamm², Jacques Roovers³ und Gerhard Kozik⁴ — ¹MPI für Polymerforschung, Ackermannweg 10, D-55128 Mainz — ²IPF Dresden, Hohe Str. 6, 01069 Dresden — ³ICPET, National Research Council Canada,Ottawa, Canada, K1A 0R6 — ⁴GKSS-Forschungszentrum, Max-Planck-Str., 21502 Geesthacht

Using small angle neutron scattering we investigated the conformation of star polymers with a functionality ranging from f=18 to f=64 in blends with linear polymers as high molecular solvent. To study only the entropic part of the interaction forces the star and the linear polymers were, apart from isotopic labeling, chemical identical, and made of polybutadiene. The entropic part of the interaction forces leads to a collapsed conformation of the star molecules compared to the conformation in good low molecular solvents. Depending on the molecular weight of the linear polymer different radii of gyration are observable. From the small angle neutron scattering data a binary interaction parameter ξ were extracted. Furthermore concentration and temperature effects were investigated.