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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 30: Friction and Rheology
CPP 30.1: Hauptvortrag
Dienstag, 13. März 2018, 11:45–12:15, C 264
Novel hyphenated rheology techniques for the study of quiescent and flow-induced polymer crystallization — Volker Räntzsch, Mürüvvet Begüm Özen, Karl-Friedrich Ratzsch, Gisela Guthausen, and •Manfred Wilhelm — Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Combining rheology with in-situ characterization techniques has received great attention in the past 30 years because such combinations lead to correlated information on flow properties, molecular dynamics and microstructure of soft matter such as polymers, liquid crystals or colloids. Additionally, flow profiles both in the linear and non-linear regime can be applied to monitor and also to modify the state of a sample and measure its implications on molecular dynamics and microstructure. Here we present novel hyphenated set-ups including RheoNMR and RheoSAXS. These unique combinations can be employed to simultaneously conduct a full rheological characterization (G′, G′′, |η*|, etc.) while monitoring molecular dynamics via 1H TD-NMR and nanoscale structure via 2D-SAXS for temperatures up to +210 ∘C. Possible applications for hyphenated rheology techniques include the measurement of crystallizing soft matter (fats, polymers, etc.) and multiphase systems during the application of shear protocols. To display the possibilities of these new techniques, studies on the quiescent and flow-induced crystallization of polyolefins are presented.