Welzel, StefanSäckel, WinfriedNieken, Ulrich2023-08-092023-08-0920221862-83381862-832X1858716896http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-134013http://elib.uni-stuttgart.de/handle/11682/13401http://dx.doi.org/10.18419/opus-13382A polymer distribution is usually represented by its moments. Thus, to calculate transport in a polymer system, a formulation for the transport of moments of the polymer is needed. This is only possible if the moments close or if there is a suitable closing condition. To archive this, two simplifications of the Stefan-Maxwell diffusion are derived, which convert the transport equation of polymeric species to a closed set of transport equations for the polymer moments. The first approach corresponds to an infinitely diluted polymer system, whereas the second one describes a highly concentrated polymer system. Both formulations are compared with the full Stefan‐Maxwell model of a ternary mixture of a solvent and two polymer species of different chain length.eninfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/4.0/540article2023-04-19