1. Freiburg Materials Research Center FMF and Institute for Macromolecular Chemistry, Albert-Ludwigs-University Freiburg, Stefan-Meier-Str. 21, D-79104 Freiburg, Germany
2. Basell Sales & Marketing B.V., LyondellBasell Industries, Industriepark Höchst, D-65926 Frankfurt am Main, Germany
3. Sustainability Center Freiburg, Ecker-Str. 4, D-79104 Freiburg, Germany
4. Institute of Physics, Martin Luther University Halle-Wittenberg, D-06120 Halle, Germany