Viscoelastic thin polymer films under transient residual stresses: Two-stage dewetting on soft substrates

被引：35

作者：

Al Akhrass, S. ^{[2
]}

Reiter, G. ^{[2
]}

Hou, S. Y. ^{[1
]}

Yang, M. H. ^{[1
]}

Chang, Y. L. ^{[1
]}

Chang, F. C. ^{[3
]}

Wang, C. F. ^{[3
]}

Yang, A. C. -M. ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan

[2] UHA CNRS, Inst Chim Surfaces & Interface, F-68057 Mulhouse, France

[3] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu, Taiwan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.100.178301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A nonmonotonic, two-stage dewetting behavior was observed for spin coated thin viscoelastic polymer films on soft elastic substrates. At times shorter than the relaxation time of the polymer (t <tau(rep)), dewetting generated deep trenches in the soft rubbery substrate which, in turn, almost stopped dewetting. At later stages (t >tau(rep)), dewetting accelerated, accompanied by an unstable rim. However, holes nucleated at t <tau(rep) showed only this second-stage behavior. Our observations are attributed to large elastic deformations in the substrate caused by transient residual stresses within the film.

引用

页数：4

共 31 条

[1]

[Anonymous], 1878, Proceedings of the London Mathematical Society, Vs1-10, P4, DOI DOI 10.1112/PLMS/S1-10.1.4

[2] Elongational viscosity of narrow molar mass distribution polystyrene [J].

Bach, A ;

Almdal, K ;

Rasmussen, HK ;

Hassager, O .

MACROMOLECULES, 2003, 36 (14) :5174-5179

[3] DEWETTING OF A WATER FILM BETWEEN A SOLID AND A RUBBER [J].

BROCHARDWYART, F ;

DEGENNES, PG .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1994, 6 :A9-A12

[4] MOTIONS OF DROPLETS ON HYDROPHOBIC MODEL SURFACES INDUCED BY THERMAL-GRADIENTS [J].

BRZOSKA, JB ;

BROCHARDWYART, F ;

RONDELEZ, F .

LANGMUIR, 1993, 9 (08) :2220-2224

[5] Viscoelastic effects in the spreading of liquids [J].

Carre, A ;

Gastel, JC ;

Shanahan, MER .

NATURE, 1996, 379 (6564) :432-434

[6] DIRECT EVIDENCE FOR VISCOSITY-INDEPENDENT SPREADING ON A SOFT SOLID [J].

CARRE, A ;

SHANAHAN, MER .

LANGMUIR, 1995, 11 (01) :24-26

[7] Relaxation of residual stress and reentanglement of polymers in spin-coated films [J].

Damman, Pascal ;

Gabriele, Sylvain ;

Coppee, Severine ;

Desprez, Sylvain ;

Villers, Didier ;

Vilmin, Thomas ;

Raphael, Elie ;

Hamieh, Moustafa ;

Al Akhrass, Samer ;

Reiter, Guenter .

PHYSICAL REVIEW LETTERS, 2007, 99 (03)

[8]

de Gennes G., 2003, CAPILLARITY WETTING

[9] Disentanglement time of polymers determines the onset of rim instabilities in dewetting [J].

Gabriele, S ;

Sclavons, S ;

Reiter, G ;

Damman, P .

PHYSICAL REVIEW LETTERS, 2006, 96 (15)

[10] Spinodal dewetting in liquid crystal and liquid metal films [J].

Herminghaus, S ;

Jacobs, K ;

Mecke, K ;

Bischof, J ;

Fery, A ;

Ibn-Elhaj, M ;

Schlagowski, S .

SCIENCE, 1998, 282 (5390) :916-919

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