The glass transition of nanoscale polymeric films

被引：15

作者：

Chow, TS ^{[1
]}

机构：

[1] Xerox Corp, Joseph C Wilson Ctr Technol, Webster, NY 14580 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2002年 / 14卷 / 19期

关键词：

D O I：

10.1088/0953-8984/14/19/101

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

On the basis of the nanoscale fluctuations of the excess number density of holes (free volumes), a theoretical model is developed to describe the glass transition temperature (T.) of polymeric films With the thickness <100 nm. A Langevin equation is used in the derivation that helps us to understand the dependence of T-g not only on film thickness but. also on molecular weight. Substrates have a strong influence on Tg and the diffusion coefficient of nanofilms, and the surface concentration of ad sorbed chain ends depends on the strength of polymer-substrate interactions.

引用

页码：l333 / l339

页数：7

共 19 条

[1] Noise and fluctuations of rough surfaces [J].

Chow, TS .

PHYSICAL REVIEW LETTERS, 1997, 79 (06) :1086-1089

[2] Fluctuations in dispersion rheology [J].

Chow, TS .

PHYSICAL REVIEW E, 2000, 62 (02) :2475-2479

[3]

CHOW TS, 2000, MESOSCOPIC PHYSICS C

[4] Molecular weight dependence of reductions in the glass transition temperature of thin, freely standing polymer films [J].

Dalnoki-Veress, K ;

Forrest, JA ;

Murray, C ;

Gigault, C ;

Dutcher, JR .

PHYSICAL REVIEW E, 2001, 63 (03)

[5]

de Gennes P.G., 1979, SCALING CONCEPTS POL

[6] Glass transitions in thin polymer films [J].

de Gennes, PG .

EUROPEAN PHYSICAL JOURNAL E, 2000, 2 (03) :201-203

[7] Interface and surface effects on the glass transition in thin polystyrene films [J].

DeMaggio, GB ;

Frieze, WE ;

Gidley, DW ;

Zhu, M ;

Hristov, HA ;

Yee, AF .

PHYSICAL REVIEW LETTERS, 1997, 78 (08) :1524-1527

[8] GLASS-TRANSITION IN CONFINED GEOMETRY [J].

FEHR, T ;

LOWEN, H .

PHYSICAL REVIEW E, 1995, 52 (04) :4016-4025

[9]

Ferry D.J., 1980, Viscoelastic Properties of Polymers, V3e

[10] Effect of free surfaces on the glass transition temperature of thin polymer films [J].

Forrest, JA ;

DalnokiVeress, K ;

Stevens, JR ;

Dutcher, JR .

PHYSICAL REVIEW LETTERS, 1996, 77 (10) :2002-2005

← 1 2 →