Effect of Binding to Carbon Black on the Dynamics of 1,4-Polybutadiene
J.H. Roh, Madhu Sudan Tyagi, T. E. Hogan, C. M. Roland
The nature of the interactions of polymers at the surface of nanoparticles is crucial to understanding the dynamics and their effect on the mechanical properties. The effect of binding (both chemical attachment and physical adsorption) on the local and global dynamic mechanical spectroscopies, we measured the slow conformational and terminal relaxations, as well as the fast local dynamics of 1,4-polybutadience (PBD) containing carbon black (CB) particles. We observed a substantial decrease in the flexibility of bound segments at temperatures through the glass transition temperature, Τg. The longer range motions of the PBD become more suppressed and cooperative as temperature decreases, while the relaxation time of the fast local dynamics is little affected by the CB particles. The mobile fraction of PBD is less sensitive to temperature when bound. Mechanical spectroscopy indicates that both the local segmental dynamics and the global chain modes are slowed by the filler. These results are consistent with transient structural arrest of the slow dynamics of the atoms adjacent to particles.
, Tyagi, M.
, Hogan, T.
and Roland, C.
Effect of Binding to Carbon Black on the Dynamics of 1,4-Polybutadiene, Journal of Chemical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914597
(Accessed February 20, 2024)