Glass transition relaxations in thin suspended polymer films

被引：30

作者：

Svanberg, C. ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden

来源：

MACROMOLECULES | 2007年 / 40卷 / 02期

关键词：

D O I：

10.1021/ma061967b

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Using dielectric spectroscopy, we probe the structural relaxation processes in thin freely suspended polystyrene films. For thin films we observe a relaxation scenario distinctly different from that of bulk polystyrene. The main glass transition relaxation becomes faster with decreasing film thickness, indicating a reduction in the glass transition temperature. For thin films we observe an additional process with an Arrhenius temperature dependence. This process is unique for thin freely suspended films and is not present in bulk polystyrene.

引用

页码：312 / 315

页数：4

共 31 条

[1] Percolation of immobile domains in supercooled thin polymeric films [J].

Baljon, ARC ;

Billen, J ;

Khare, R .

PHYSICAL REVIEW LETTERS, 2004, 93 (25)

[2] Quantitative equivalence between polymer nanocomposites and thin polymer films [J].

Bansal, A ;

Yang, HC ;

Li, CZ ;

Cho, KW ;

Benicewicz, BC ;

Kumar, SK ;

Schadler, LS .

NATURE MATERIALS, 2005, 4 (09) :693-698

[3] Evidence for the shift of the glass transition near the particles in silica-filled elastomers [J].

Berriot, J ;

Montes, H ;

Lequeux, F ;

Long, D ;

Sotta, P .

MACROMOLECULES, 2002, 35 (26) :9756-9762

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

de Gennes, PG .

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

[6]

de Gennes PG, 2000, CR ACAD SCI IV-PHYS, V1, P1179

[7] Glass transition in ultrathin polymer films: Calorimetric study [J].

Efremov, MY ;

Olson, EA ;

Zhang, M ;

Zhang, Z ;

Allen, LH .

PHYSICAL REVIEW LETTERS, 2003, 91 (08)

[8] The distribution of glass-transition temperatures in nanoscopically confined glass formers [J].

Ellison, CJ ;

Torkelson, JM .

NATURE MATERIALS, 2003, 2 (10) :695-700

[9] Probing slow dynamics in supported thin polymer films [J].

Fakhraai, Z ;

Forrest, JA .

PHYSICAL REVIEW LETTERS, 2005, 95 (02)

[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

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