Tear Velocity Dependence of High-Strength Double Network Gels in Comparison with Fast and Slow Relaxation Modes Observed by Scanning Microscopic Light Scattering

被引：34

作者：

Furukawa, Hidemitsu ^{[1
]}

Kuwabara, Rikimaru ^{[1
]}

Tanaka, Yoshimi ^{[1
]}

Kurokawa, Takayuki ^{[1
]}

Na, Yang-Ho ^{[1
]}

Osada, Yoshihito ^{[1
]}

Gong, Jian Ping ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Sci, Dept Biol Sci, Sapporo, Hokkaido 0600810, Japan

来源：

MACROMOLECULES | 2008年 / 41卷 / 19期

关键词：

D O I：

10.1021/ma800821j

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

To investigate the mechanical strength of double network (DN) gels in a wide dynamical range, the gel solvent was replaced with viscous solvents-ethylene glycol and glycerol-and with their mixtures with water. The viscosity dependence of fracture energy in a tearing test was weak but demonstrated the existence of characteristic tear velocity for maximum fracture energy as a function of solvent viscosity. Fast and slow relaxation modes in the gels' dynamics were simultaneously observed by scanning microscopic light scattering, which reveals that the DN-gel structure stays unperturbed by the solvent change. These results implied that the solvent viscosity weakly affect the toughness and structure of the DN gels. Further, we demonstrated that the effect of solvent viscosity on the fracture energy can be incorporated into a scaled tear velocity that distributes over 6 orders of magnitude. We concluded that the viscous friction between polymer and solvent is not particularly significant for the energy dissipation of DN-gel fracture.

引用

页码：7173 / 7178

页数：6

共 20 条

[1] A model of the fracture of double network gels [J].

Brown, Hugh R. .

MACROMOLECULES, 2007, 40 (10) :3815-3818

[2] Soft adhesives [J].

deGennes, PG .

LANGMUIR, 1996, 12 (19) :4497-4500

[3] Sacrificial bonds and hidden length: Unraveling molecular mesostructures in tough materials [J].

Fantner, GE ;

Oroudjev, E ;

Schitter, G ;

Golde, LS ;

Thurner, P ;

Finch, MM ;

Turner, P ;

Gutsmann, T ;

Morse, DE ;

Hansma, H ;

Hansma, PK .

BIOPHYSICAL JOURNAL, 2006, 90 (04) :1411-1418

[4] Swelling-induced modulation of static and dynamic fluctuations in polyacrylamide gels observed by scanning microscopic light scattering [J].

Furukawa, H ;

Horie, K ;

Nozaki, R ;

Okada, M .

PHYSICAL REVIEW E, 2003, 68 (03) :14

[5] Double-network hydrogels with extremely high mechanical strength [J].

Gong, JP ;

Katsuyama, Y ;

Kurokawa, T ;

Osada, Y .

ADVANCED MATERIALS, 2003, 15 (14) :1155-+

[6]

Haraguchi K, 2002, ADV MATER, V14, P1120, DOI 10.1002/1521-4095(20020816)14:16<1120::AID-ADMA1120>3.0.CO

[7]

2-9

[8] Importance of entanglement between first and second components in high-strength double network gels [J].

Huang, Mei ;

Furukawa, Hidemitsu ;

Tanaka, Yoshimi ;

Nakajima, Tasuku ;

Osada, Yoshihito ;

Gong, Jian Ping .

MACROMOLECULES, 2007, 40 (18) :6658-6664

[9] STRENGTH OF HIGHLY ELASTIC MATERIALS [J].

LAKE, GJ ;

THOMAS, AG .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1967, 300 (1460) :108-&

[10] Necking phenomenon of double-network gels [J].

Na, YH ;

Tanaka, Y ;

Kawauchi, Y ;

Furukawa, H ;

Sumiyoshi, T ;

Gong, JP ;

Osada, Y .

MACROMOLECULES, 2006, 39 (14) :4641-4645

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