Thermal molecular motion of polystyrene ultrathin films on various substrates

Keiichi Akabori, Keiji Tanaka, Toshihiko Nagamura, Atsushi Takahara, Tisato Kajiyama

Research output: Contribution to conferencePaperpeer-review

Abstract

Thermal molecular motion of polystyrene (PS) ultrathin films on various substrates was examined by dynamic viscoelastic measurement. In the case of the ultrathin films on substrates, the αa-absorption peak corresponding to the segmental motion was broadened toward lower and higher temperature sides because of surface and interfacial effects. When a PS ultrathin film was sandwiched between SiOx layers, an interfacial αa-relaxation peak appeared at the higher temperature side in addition to the original peak from the internal phase. However, this was trivial for a PS ultrathin film between Al layers, instead, the original peak was shifted to the lower temperature side due probably to a chain confinement effect. Finally, it was concluded that the effects of free surface and a chain confinement activate the segmental motion, whereas interfacial interactions produce the opposite effect.

Original languageEnglish
Number of pages1
Publication statusPublished - Dec 1 2005
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: Sep 20 2005Sep 22 2005

Other

Other54th SPSJ Symposium on Macromolecules
CountryJapan
CityYamagata
Period9/20/059/22/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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