6533b82cfe1ef96bd128f324
RESEARCH PRODUCT
Dynamics at the Temperature Crossover in Dilute Polymer Solutions Investigated by Neutron Spin-Echo Spectroscopy
J. B. HayterB. EwenDieter Richtersubject
Momentumchemistry.chemical_classificationLaser linewidthMaterials scienceReduced propertieschemistryCondensed matter physicsCrossoverGeneral Physics and AstronomyNeutronPolymerSpectroscopyNeutron spin echodescription
Applying ultrahigh-resolution neutron spin-echo spectroscopy the existence of a $q$-dependent temperature crossover in the dynamics of dilute polymer solutions was proved. It is associated with the transition from $\ensuremath{\theta}$ to good solvent conditions. At small momentum transfers $q$ a nearly stepwise increase of the reduced quasielastic linewidth versus the reduced temperature was observed. With increasing $q$, both the sharpness of the transition and the step height decrease.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1980-12-29 | Physical Review Letters |