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RESEARCH PRODUCT
Chemical structure and internal diffusion within polymer chains in the melt
B. EwenD. RichterBernd Stühnsubject
chemistry.chemical_classificationRange (particle radiation)Materials sciencePolydimethylsiloxanePolymerNeutron scatteringCondensed Matter PhysicsElectronic Optical and Magnetic Materialschemistry.chemical_compoundMonomerchemistryChemical physicsQuasielastic neutron scatteringGeneral Materials ScienceWave vectorDiffusion (business)description
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 A−1≦q≦0.30 A−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 constantDm, is found to be (1.2±0.2)·10−5 cm2s−1.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1985-12-01 | Zeitschrift f�r Physik B Condensed Matter |