Brillouin and Umklapp scattering in polybutadiene: comparison of neutron and x-ray scattering.
We report a comparison of high resolution inelastic x-ray Brillouin scattering to coherent inelastic neutron scattering for amorphous deuterated polybutadiene, done for one temperature in the glass phase and another one in the melt. The x-ray scattering proves to be by far the better technique for such a polymer within its present resolution bounds. The neutron scattering allows one to extend these measurements to a much better resolution, showing an additional quasielastic signal in the melt. The results suggest x-ray measurements at higher momentum transfer, to see whether they are complementary to neutrons.
Sokolov
A P
AP
Department of Polymer Science, University of Akron, Akron, Ohio 44325-3909, USA.
Buchenau
U
U
Richter
D
D
Masciovecchio
C
C
Sette
F
F
Mermet
A
A
Fioretto
D
D
Ruocco
G
G
Willner
L
L
Frick
B
B