Abstract:This lecture reviews quasielastic small angle neutron scattering experiments exploring the dynamics of polymer melts. Starting from the entropy driven Rouse dynamics, I address its limitation to larger and smaller scales. On the large scale side neutron spin echo spectroscopy reveals the single chain dynamic structure factor and the self correlation function of a spatially confined chain in accordance with the reptation concept and shows that contour length fluctuations limit the chain confinement on the time … Show more
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