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Variation in glass transition temperature of polymer nanocomposite films driven by morphological transitions.

Authors
  • Chandran, Sivasurender
  • Basu, J K
  • Mukhopadhyay, M K
Type
Published Article
Journal
The Journal of Chemical Physics
Publisher
AIP Publishing
Publication Date
Jan 07, 2013
Volume
138
Issue
1
Pages
14902–14902
Identifiers
DOI: 10.1063/1.4773442
PMID: 23298060
Source
Medline
License
Unknown

Abstract

We report the variation of glass transition temperature in supported thin films of polymer nanocomposites, consisting of polymer grafted nanoparticles embedded in a homopolymer matrix. We observe a systematic variation of the estimated glass transition temperature T(g), with the volume fraction of added polymer grafted nanoparticles. We have correlated the observed T(g) variation with the underlying morphological transitions of the nanoparticle dispersion in the films. Our data also suggest the possibility of formation of a low-mobility glass or gel-like layer of nanoparticles at the interface, which could play a significant role in determining T(g) of the films provided.

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