Unusual deviations from bulk behavior in ultrathin films of poly(tert-butylstyrene): can dead layers induce a reduction of T(g)?

ACS Nano
Simone NapolitanoMichael Wübbenhorst

Abstract

The temperature and thickness dependence of the thermal expansivity of ultrathin thin films of poly(tert-butylstyrene) capped between aluminum layers revealed an unusual and intriguing confinement scenario. Below 50 nm, both the glass transition temperature and the thermal expansion coefficients decreased. Such a mixed behavior implies an enhancement of the molecular mobility, without the presence of any free surface, but dead layers. On the basis of a careful analysis of averaged quantities measured by capacitive dilatometry, we deduced a profile of thermal expansivity that explains our experimental data and previous observations in polymer nanocomposites. The effect of density-conformation coupling in proximity of a nonattractive interface allows the coexistence of an immobilized fraction in direct contact with the metal and an excess of thermal expansivity, arising from the long-range effects of packing frustration penetrating inside the bulk-like core of the film.

References

Oct 1, 1995·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·W E WallaceW L Wu
Jan 16, 1989·Physical Review Letters·R A JonesS A Schwarz
Oct 25, 2000·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·K Fukao, Y Miyamoto
Oct 25, 2000·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·C BauerD Neher
Apr 20, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·S Kawana, R A Jones
Sep 23, 2003·Nature Materials·Christopher J Ellison, John M Torkelson
Mar 11, 2004·The European Physical Journal. E, Soft Matter·H RichardsonJ L Keddie
Jul 13, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Tsukasa MiyazakiToshiji Kanaya
Nov 1, 2005·Solid State Nuclear Magnetic Resonance·D-K Yang, D B Zax
Jul 20, 2007·The Journal of Physical Chemistry. B·Simone Napolitano, Michael Wübbenhorst
Feb 2, 2008·Science·Z Fakhraai, J A Forrest
Mar 5, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Diana LabahnAndreas Schönhals
Aug 8, 2009·Physical Review Letters·David R Barbero, Ullrich Steiner

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Citations

Sep 21, 2013·Science·Martin TressFriedrich Kremer
Apr 22, 2011·Macromolecular Rapid Communications·Simone NapolitanoMichael Wübbenhorst
Oct 12, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Jaime MartínMarisol Martín-González
Aug 15, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·E Tilo HoppeChristine M Papadakis
Jan 31, 2017·Reports on Progress in Physics·Simone NapolitanoNicholas B Tito
Feb 2, 2013·Physical Review Letters·Peter GinTadanori Koga
Aug 10, 2019·The European Physical Journal. E, Soft Matter·Alice DebotSimone Napolitano
Jun 3, 2017·The Journal of Chemical Physics·Marie-Luise BraatzSimone Napolitano
Mar 17, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Katherine R ThomasUllrich Steiner
Jan 15, 2011·Physical Review Letters·Adam RaegenGünter Reiter
Dec 21, 2011·Physical Review Letters·Tadanori KogaS K Sinha
Apr 3, 2021·Physical Review Letters·Xavier MonnierDaniele Cangialosi
Aug 2, 2021·Journal of Colloid and Interface Science·Wenyang XuEero Kontturi
Mar 13, 2018·ACS Applied Materials & Interfaces·Wojciech OgiegloIngo Pinnau

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