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Glass Transition Temperature in ConfinedPolymers

Published online by Cambridge University Press:  26 February 2011

Rahmi Ozisik,
Tong Liu and
Richard W. Siegel
Rahmi Ozisik
Affiliation:
ozisik@rpi.edu, Rensselaer Polytechnic Institute, Materials Science and Engineering, 110 Eight Street, Troy, NY, 12180, United States
Tong Liu
Affiliation:
liut@rpi.edu, Rensselaer Polytechnic Institute, Materials Science and Engineering, Troy, NY, 12180, United States
Richard W. Siegel
Affiliation:
rwsiegel@rpi.edu, Rensselaer Polytechnic Institute, Materials Science and Engineering, Troy, NY, 12180, United States
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Abstract

Glass transition temperature of polyetherimide (PEI) thin films andnanoporous PEI samples was investigated using differential scanningcalorimetry. In both of these systems, the glass transition temperaturedecreased with respect to the bulk value. In the nanoporous system, scanningelectron microscope images were used to characterize pore size distribution,and Monte Carlo simulations were performed to calculate the nearest neighborpore-to-pore distances. Pore-to-pore distances and thin film thicknessvalues were used to establish a quantitative analogy between thin films andnanoporous system.

Keywords

thin filmpolymernanostructure

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