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

Mark D. Losego, Lionel Moh, Kevin A. Arpin, David G. Cahill, Paul V. Braun

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Article number011908
JournalApplied Physics Letters
Volume97
Issue number1
DOIs
StatePublished - Jul 5 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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