Glass transition and molecular mobility in polymer thin films

被引：55

作者：

Inoue, R. ^{[1
]}

Kanaya, T. ^{[1
]}

Nishida, K. ^{[1
]}

Tsukushi, I. ^{[2
]}

Telling, M. T. F. ^{[3
]}

Gabrys, B. J. ^{[4
]}

Tyagi, M. ^{[5
]}

Soles, C. ^{[6
]}

Wu, W. -I. ^{[6
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[2] Chiba Inst Technol, Narashino, Chiba 2750023, Japan

[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[4] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[5] Natl Inst Stand & Technol, Ctr Neurtron Res, Gaithersburg, MD 20899 USA

[6] Natl Inst Stand & Technol, Div Polymers, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW E | 2009年 / 80卷 / 03期

关键词：

DYNAMICS; TEMPERATURE; SPECTROMETER; RELAXATION; SIZE;

D O I：

10.1103/PhysRevE.80.031802

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Extensive studies on polymer thin films to date have revealed their interesting but unusual properties such as film thickness dependence of glass transition temperature T-g and thermal expansivity. Recent studies have shown that the lower T-g is not always related to the higher mobility in polymer thin films, which contradicts our current understanding of the glass transition process. In this work, we report the results of inelastic neutron-scattering measurements on polystyrene thin films using two spectrometers with different energy resolutions as well as ellipsometry measurements. The results are interpreted in terms of cooperatively rearranging region and motional slowing down due to the surface effect that explain plausibly the anomalous relationship between the glass transition temperature T-g and the molecular mobility in thin films.

引用

页数：4

共 25 条

[1] INTERCONNECTION BETWEEN FREQUENCY-DOMAIN HAVRILIAK-NEGAMI AND TIME-DOMAIN KOHLRAUSCH-WILLIAMS-WATTS RELAXATION FUNCTIONS [J].