Defektkristall und Mäandermodell

Investigation of chain folding in polyethylene melts by diffuse neutron scattering

“…(ii) The diffuse scattering: j^iQ) = CdChI-ZW/S(r).ff(r)e*' d3r (11) Equation 11 can be derived from first principles by assuming a random distribution of molecules and identical intramolecular correlations Hir) for both components.…”

“…Besides this random coil model, which denies any order in the amorphous or molten state of polymers, folding models have also been proposed, e.g., the meander model of Pechold.10,11 The essential feature of this folding model is the formation of bundles of parallel chain segments. To obtain orientational isotropy a superfolding was introduced, leading to a meander shape of the bundles.…”