Glass transition of polymers in confined systems

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this paper, glass transitions of polystyrene (PS) in confined geometry such as ultrathin state, surface and interface were studied. Dynamic mechanical analysis was successfully used to characterize polymer ultrathin films supported on substrates. This method allowed us to uncover the effects of the free surface and the substrate interface on the segmental dynamics in PS films with various thickness. As the film thickness decreased, the distribution of relaxation times for the segmental motion became broader, a change mainly due to surface and interfacial effects. The results obtained in this study imply that two contrasting effects exist: the effect of the free surface accelerates the segmental motion, whereas interfacial interaction produce the opposite effect. This was also confirmed by independent experiments related to glass transition temperature at the surface and the interface by scanning force microscopy and time- and space-resolved fluorescence spectroscopy, respectively.

Original languageEnglish
Pages (from-to)539-547
Number of pages9
JournalKOBUNSHI RONBUNSHU
Volume63
Issue number8
DOIs
Publication statusPublished - Aug 1 2006

Fingerprint

Glass transition
Polymers
polymer
glass
Polystyrenes
Ultrathin films
Interface states
Fluorescence spectroscopy
Surface states
Dynamic mechanical analysis
Substrates
substrate
Polymer films
Relaxation time
fluorescence spectroscopy
Film thickness
Atomic force microscopy
microscopy
Geometry
effect

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Materials Science (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

Glass transition of polymers in confined systems. / Tanaka, Keiji.

In: KOBUNSHI RONBUNSHU, Vol. 63, No. 8, 01.08.2006, p. 539-547.

Research output: Contribution to journalArticle

@article{27a60c96f3e94a969c258edf09d882cc,
title = "Glass transition of polymers in confined systems",
abstract = "In this paper, glass transitions of polystyrene (PS) in confined geometry such as ultrathin state, surface and interface were studied. Dynamic mechanical analysis was successfully used to characterize polymer ultrathin films supported on substrates. This method allowed us to uncover the effects of the free surface and the substrate interface on the segmental dynamics in PS films with various thickness. As the film thickness decreased, the distribution of relaxation times for the segmental motion became broader, a change mainly due to surface and interfacial effects. The results obtained in this study imply that two contrasting effects exist: the effect of the free surface accelerates the segmental motion, whereas interfacial interaction produce the opposite effect. This was also confirmed by independent experiments related to glass transition temperature at the surface and the interface by scanning force microscopy and time- and space-resolved fluorescence spectroscopy, respectively.",
author = "Keiji Tanaka",
year = "2006",
month = "8",
day = "1",
doi = "10.1295/koron.63.539",
language = "English",
volume = "63",
pages = "539--547",
journal = "Kobunshi Ronbunshu",
issn = "0386-2186",
publisher = "The Society of Polymer Science, Japan",
number = "8",

}

TY - JOUR

T1 - Glass transition of polymers in confined systems

AU - Tanaka, Keiji

PY - 2006/8/1

Y1 - 2006/8/1

N2 - In this paper, glass transitions of polystyrene (PS) in confined geometry such as ultrathin state, surface and interface were studied. Dynamic mechanical analysis was successfully used to characterize polymer ultrathin films supported on substrates. This method allowed us to uncover the effects of the free surface and the substrate interface on the segmental dynamics in PS films with various thickness. As the film thickness decreased, the distribution of relaxation times for the segmental motion became broader, a change mainly due to surface and interfacial effects. The results obtained in this study imply that two contrasting effects exist: the effect of the free surface accelerates the segmental motion, whereas interfacial interaction produce the opposite effect. This was also confirmed by independent experiments related to glass transition temperature at the surface and the interface by scanning force microscopy and time- and space-resolved fluorescence spectroscopy, respectively.

AB - In this paper, glass transitions of polystyrene (PS) in confined geometry such as ultrathin state, surface and interface were studied. Dynamic mechanical analysis was successfully used to characterize polymer ultrathin films supported on substrates. This method allowed us to uncover the effects of the free surface and the substrate interface on the segmental dynamics in PS films with various thickness. As the film thickness decreased, the distribution of relaxation times for the segmental motion became broader, a change mainly due to surface and interfacial effects. The results obtained in this study imply that two contrasting effects exist: the effect of the free surface accelerates the segmental motion, whereas interfacial interaction produce the opposite effect. This was also confirmed by independent experiments related to glass transition temperature at the surface and the interface by scanning force microscopy and time- and space-resolved fluorescence spectroscopy, respectively.

UR - http://www.scopus.com/inward/record.url?scp=33748907980&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748907980&partnerID=8YFLogxK

U2 - 10.1295/koron.63.539

DO - 10.1295/koron.63.539

M3 - Article

AN - SCOPUS:33748907980

VL - 63

SP - 539

EP - 547

JO - Kobunshi Ronbunshu

JF - Kobunshi Ronbunshu

SN - 0386-2186

IS - 8

ER -