Relationship between structural and stress relaxation in a block-copolymer melt

被引：22

作者：

Patel, Amish J. ^{[1
]}

Narayanan, Suresh

Sandy, Alec

Mochrie, Simon G. J.

Garetz, Bruce A.

Watanabe, Hiroshi

Balsara, Nitash P.

机构：

[1] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[4] Polytech Univ, Othmer Dept Chem & Biol Sci & Engn, Brooklyn, NY 11201 USA

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

[6] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[7] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy & Technol Div, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.96.257801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The relationship between structural relaxation on molecular length scales and macroscopic stress relaxation was explored in a disordered block-copolymer melt. Experiments show that the structural relaxation time, measured by x-ray photon correlation spectroscopy is larger than the terminal stress relaxation time, measured by rheology, by factors as large as 100. We demonstrate that the structural relaxation data are dominated by the diffusion of intact micelles while the stress relaxation data are dominated by contributions due to disordered concentration fluctuations.

引用

页数：4

共 23 条

[1] Structure and phase behavior of block copolymer melts near the sphere-cylinder boundary [J].

Abuzaina, FM ;

Patel, AJ ;

Mochrie, S ;

Narayanan, S ;

Sandy, A ;

Garetz, BA ;

Balsara, NP .

MACROMOLECULES, 2005, 38 (16) :7090-7097

[2]

Anastasiadis SH, 2000, CURR OPIN COLLOID IN, V5, P324

[3] Study of the dynamic structure factor in the beta relaxation regime of polybutadiene [J].

Arbe, A ;

Buchenau, U ;

Willner, L ;

Richter, D ;

Farago, B ;

Colmenero, J .

PHYSICAL REVIEW LETTERS, 1996, 76 (11) :1872-1875

[4] FLUCTUATION EFFECTS IN A SYMMETRIC DIBLOCK COPOLYMER NEAR THE ORDER-DISORDER TRANSITION [J].

BATES, FS ;

ROSEDALE, JH ;

FREDRICKSON, GH .

JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (10) :6255-6270

[5] DIELECTRIC RELAXATION IN LIQUID POLYPROPYLENE OXIDES [J].

BAUR, ME ;

STOCKMAYER, WH .

JOURNAL OF CHEMICAL PHYSICS, 1965, 43 (12) :4319-+

[6]

Berne BJ, 2000, DYNAMIC LIGHT SCATTE

[7] Structure and dynamics of disordered tetrablock copolymers: Composition and temperature dependence of local friction [J].

Chapman, BR ;

Hamersky, MW ;

Milhaupt, JM ;

Kostelecky, C ;

Lodge, TP ;

von Meerwall, ED ;

Smith, SD .

MACROMOLECULES, 1998, 31 (14) :4562-4573

[8] Grain shapes and growth kinetics of the cylinder phase in a block copolymer solution [J].

Chastek, TQ ;

Lodge, TP .

MACROMOLECULES, 2004, 37 (13) :4891-4899

[9] LIQUID DYNAMICS AND INELASTIC SCATTERING OF NEUTRONS [J].

DEGENNES, PG .

PHYSICA, 1959, 25 (09) :825-839

[10] The order-disorder transition and the disordered micelle regime in sphere-forming block copolymer melts [J].

Dormidontova, EE ;

Lodge, TP .

MACROMOLECULES, 2001, 34 (26) :9143-9155

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