Molecular dynamics of solutions of poly-3-octyl-thiophene and functionalized single wall carbon nanotubes studied by neutron scattering

摘要: Using both quasielastic and elastic window neutron spectroscopy, we study the molecular dynamics of poly-3-octyl-thiophene mixtures carbon nanotube derivatives poly-3-octyl-thiophene, in deuterated toluene solutions. From analysis experimental results solutions for a broad range concentrations, from very diluted to concentrated, different regimes motions are established, critical concentration between 2 3 wt% overlapping macromolecules is obtained, including evidence gelation processes higher concentrations driven by entanglement macromolecules. Additionally, temperature momentum dependence characteristic times obtained fit data stretched exponential models, delivering dependent subnanosecond timescales diffusion macromolecule (0.02–0.5 ns).