Thermal molecular motion of polystyrene ultrathin films on various substrates

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

Research output: Contribution to conferencePaper

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)

Fingerprint Dive into the research topics of 'Thermal molecular motion of polystyrene ultrathin films on various substrates'. Together they form a unique fingerprint.

  • Cite this

    Akabori, K., Tanaka, K., Nagamura, T., Takahara, A., & Kajiyama, T. (2005). Thermal molecular motion of polystyrene ultrathin films on various substrates. Paper presented at 54th SPSJ Symposium on Macromolecules, Yamagata, Japan.