Abstract
We report QENS measurements from PS-b-PFOA aggregates in supercritical CO2. Line shapes are dominated by localized diffusive modes and segmental dynamics of the anchored, finite-length PFOA chains. For Q=0.6 angstrom-1, we obtain effective diffusion coefficients of ?0.8 10-6 cm2/s. At higher Q, a single component is not sufficient as shown by excess intensity on the flanks. For Q=1.5 angstroms-1, the wings reflect contributions due to a distribution of faster, more localized chain modes.
Original language | English |
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Pages (from-to) | 386-387 |
Number of pages | 2 |
Journal | Physica B: Condensed Matter |
Volume | 276-278 |
DOIs | |
Publication status | Published - Mar 2000 |
Event | 2nd European Conference on Neutron Scattering - Budapest, Hung Duration: 1 Sept 1999 → 4 Sept 1999 |