Abstract
The single chain dynamics of polydimethylsiloxane in the melt is studied by means of quasielastic neutron scattering. For this polymer the wave vector range 0.03 Å−1≦q≦0.30 Å−1 covers the regime of universal modes as well as local diffusive processes. A model is described which incorporates the specific chemical structure of the macromolecule and allows to interpret our data in the full wave vector regime. The only parameter which enters the model, the monomer diffusion constantD m, is found to be (1.2±0.2)·10−5 cm2s−1.
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Stühn, B., Ewen, B. & Richter, D. Chemical structure and internal diffusion within polymer chains in the melt. Z. Physik B - Condensed Matter 58, 305–310 (1985). https://doi.org/10.1007/BF01303672
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DOI: https://doi.org/10.1007/BF01303672