Phase separation in polymer blend thin films studied by differential AC chip calorimetry

Nicolaas-Alexander Gotzen, Heiko Huth, Christoph Schick, Guy Van Assche, Carine Neus, Bruno Van Mele

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

AC chip calorimetry is used to study the phase separation behavior of 100 nm thin poly(vinyl methyl ether)/poly(styrene) (PVME/PS) blend films. Using the on-chip heaters, very short (10 MS-10 S) temperature jumps into the temperature window of phase separation are applied, simulating laser heating induced patterning. These temperature pulses produce a measurable shift in the glass transition temperature, evidencing phase separation. The effect of pulse length and height on phase separation can be studied. The thus phase separated PVME/PS thin films remix rapidly, in contrast with measurements in bulk. AC chip calorimetry seems to be a more sensitive technique than atomic force microscopy to detect the early stages of phase separation in polymer blend thin films.
Original languageEnglish
Pages (from-to)647-654
Number of pages8
JournalPolymer
Volume51
Publication statusPublished - 2010

Keywords

  • phase behaviour
  • chip calorimetry
  • AC calorimetry
  • polymer blends
  • nanocalorimetry
  • glass transition

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