Dresden 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

CPP: Chemische Physik und Polymerphysik

CPP 11: POSTER Disperse Polymer Systems

CPP 11.21: Poster

Dienstag, 28. März 2006, 17:00–19:00, P3

Melts of Reactively Compatibilized Blends of Polyamide 6 and Styrenic Polymers: Linear Viscoelasticity and Fractional Calculus — •Christian Sailer and Ulrich A. Handge — Institute of Polymers, Department of Materials, ETH Zürich, CH-8093 Zürich

In this study, we investigated the linear viscoelastic properties of reactively compatibilized blends of polyamide 6 and styrenic polymers in the molten state. Two blend systems were considered, i.e. blends of polyamide 6 (PA6) and acrylonitrile-styrene (SAN-K) and blends of PA6 and acrylonitrile-butadiene-styrene (ABS-K) which consisted of SAN-K and 10 wt.% of rubber particles. The compatibilizing agent was added to SAN-K and ABS-K and was capable of reacting with the amine end groups of PA6 in situ during melt blending. In linear viscoelastic shear oscillations we observed a complex low frequency dependence of the dynamic moduli for all blends. In contrast to the pure components the slopes of the G′(ω) and G″(ω) curves in the double-logarithmic plot were decreasing with decreasing frequency and the moduli exceeded the values of the components in the range of low frequencies. We analyzed the data by applying fractional differential models [1, 2]. Our analysis revealed that the data can be fitted by the model well over the whole frequency range.
Chr. Friedrich, J. Non-Newtonian Fluid Mech., 46 (1993) 307.
H. Schiessel and A. Blumen, J. Phys. A: Math. Gen., 26 (1993) 5057.