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Temperature-Activated Interfacial Friction Damping in Carbon Nanotube
 

Summary: Temperature-Activated Interfacial
Friction Damping in Carbon Nanotube
Polymer Composites
Jonghwan Suhr,*, Wei Zhang, Pulickel M. Ajayan, and Nikhil A. Koratkar*,
Department Mechanical, Aerospace and Nuclear Engineering and Department of
Materials Science and Engineering, Rensselaer Polytechnic Institute,
Troy, New York 12180
Received November 1, 2005; Revised Manuscript Received January 2, 2006
ABSTRACT
Effect of temperature on interfacial sliding in single-walled carbon nanotube polycarbonate composites is investigated experimentally. We
show that interfacial slip at the tube-polymer interfaces can be activated at relatively low dynamic strain levels (0.35%) by raising temperature
to 90 C. We attribute this to increased mobility of the polymer chain backbones at elevated temperatures and thermal relaxation of the
radial compressive stresses at the tube-polymer interfaces. These results show the potential of polymer nanocomposites as high-temperature
damping materials for vibration and acoustic suppression in a variety of dynamic systems.
The demand for high-performance damping materials is
rapidly and continuously growing in a variety of aerospace,
mechanical, and civil systems. Although viscoelastic polymer
based damping treatments1
are shown to be promising for
vibration and noise control, they suffer from several limita-

  

Source: Ajayan, Pulickel M. - Department of Mechanical Engineering and Materials Science, Rice University

 

Collections: Materials Science