The dynamics of propylene glycol (PG) and its 7-mer were investigated using quasielastic neutron scattering (QENS) and neutron spin-echo (NSE). The QENS results showed a weakly temperature dependent fast local motion of hydrogens in the polymeric backbone, an almost temperature independent rotational motion of the methyl groups, and a strongly temperature dependent translational process. It was also observed that the dynamics was slowest and the stetching parameter βKWW was largest for Q= 1.4 Å-1.
|Number of pages||7|
|Journal||Journal of Chemical Physics|
|Publication status||Published - 22 Mar 2002|