Molmassenverteilung und lösungszustand von linearen polyethylenen, 2. Vergleich von berechneten mit experimentell bestimmten streufunktionen

Scattering functions for linear polyethylenes were calculated, using different assumptions, and compared with experimentally determined scattering functions of the system polyethylene/decane. It is pointed out, that the polyethylene macromolecules in a good solvent can be treated as statistical coils with a non-uniform expansion and a constant average expansion exponent ε and not as statistical coils with uniform expansion. Comparison of the experimentally determined and the calculated scattering functions yields a molar mass distribution of polyethylene which is in agreement with the results from GPC-measurements within the limits of experimental error.