Interfacial thermal conductance in spun-cast polymer films and polymer brushes

  • Losego M
  • Moh L
  • Arpin K
 et al. 
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Interfaces between inorganic materials and anharmonic polymers have potentially intriguing thermal transport behavior. The low thermal conductivity of amorphous polymers limits significant interfacial effects to polymer film thicknesses of only a few nanometers. We use time-domain thermoreflectance to directly measure interfacial effects in the thermal conductance of spun-cast poly(methyl methacrylate) (PMMA) thin films and PMMA brushes "grafted-from" the substrate. PMMA brushes are expected to have polymer chains partially aligned perpendicular to the substrate, yet only a modest increase (13%) in thermal conductivity is observed over spun-cast layers. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3458802]

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  • Mark D. Losego

  • Lionel Moh

  • Kevin A. Arpin

  • David G. Cahill

  • Paul V. Braun

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