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Volumn 29, Issue 6, 1996, Pages 2289-2297

Conformation of polymer brushes under shear: Chain tilting and stretching

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EID: 0001050766     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma951071z     Document Type: Article
Times cited : (99)

References (38)
  • 4
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    • de Gennes, P.-G. J. Phys. (Paris) 1976, 37, 1443; Macromolecules 1980, 13, 1069.
    • (1980) Macromolecules , vol.13 , pp. 1069
  • 6
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    • Milner, S. T.; Witten, T. A.; Cates, M. E. Europhys. Lett. 1988, 5, 413; Macromolecules 1988, 21, 2610.
    • (1988) Macromolecules , vol.21 , pp. 2610
  • 9
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    • Taunton, H. J.; Toprakcioglu, C.; Klein, J. Macromolecules 1988, 21, 3336. Taunton, H. J.; Toprakcioglu, C.; Fetters, L. J.; Klein, J. Nature (London) 1988, 332, 712; Macromolecules 1990, 23, 571.
    • (1988) Macromolecules , vol.21 , pp. 3336
    • Taunton, H.J.1    Toprakcioglu, C.2    Klein, J.3
  • 11
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    • Taunton, H. J.; Toprakcioglu, C.; Klein, J. Macromolecules 1988, 21, 3336. Taunton, H. J.; Toprakcioglu, C.; Fetters, L. J.; Klein, J. Nature (London) 1988, 332, 712; Macromolecules 1990, 23, 571.
    • (1990) Macromolecules , vol.23 , pp. 571
  • 12
    • 0026109156 scopus 로고
    • Milner, S. T. Science 1991, 251, 905. Halperin, A.; Tirrell, M.; Lodge, T. P. Adv. Polym. Sci. 1991, 100, 31.
    • (1991) Science , vol.251 , pp. 905
    • Milner, S.T.1
  • 17
    • 85033819661 scopus 로고    scopus 로고
    • note
    • An example of the effect of fluctuations is the appearance of an exponential tail in the monomer density profile of a brush of polymers of finite chain length. This exponential tail is particularly important to the study of the forces between two brushes of short chains.
  • 19
    • 0021372413 scopus 로고
    • Katz, S.; Lebowitz, J. L.; Spohn, H. Phys. Rev. B 1983, 28, 1655; J. Stat. Phys. 1984, 34, 497.
    • (1984) J. Stat. Phys. , vol.34 , pp. 497
  • 27
    • 85033830528 scopus 로고    scopus 로고
    • note
    • By using the averaged local monomer density, we implicitly make the assumption that the time scale at which the monomer density fluctuates is much shorter than the time scales typical for the macroscopic flow of the solvent.
  • 28
    • 85033823147 scopus 로고    scopus 로고
    • note
    • z=h, eliminates the "kink" that appeared in the velocity profile calculated in ref 11. This condition is correct, since a "kink", or the discontinuity, in the first derivative of the velocity would imply a singular viscous force acting upon the fluid elements at the interface.
  • 30
    • 85033809846 scopus 로고    scopus 로고
    • note
    • The picture that leads to this scaling for the brushes is the following: Each chain is described as a sequence of subunits, called "blobs", and each blob is characterized by the swelling exponent v = 3/5. Of course, it should be kept in mind that a brush formed from polymer molecules of finite chain length deviates to some extent from this picture. It should also be noted that, when chains are stretched by very strong forces, as may be the case when the shear flow is strong, the blob size is determined by the stretching force.
  • 32
    • 85033830579 scopus 로고    scopus 로고
    • note
    • shear, is linear in γ.
  • 34
    • 85033827931 scopus 로고    scopus 로고
    • note
    • In this approximation, the effect of the excluded-volume interaction is being neglected.
  • 35
    • 85033811171 scopus 로고    scopus 로고
    • note
    • Barrat discussed a mechanism in ref 27 for swelling of a brush under shear. However, it can be shown that the "brush swelling" predicted there is an artifact due to an underestimate of the brush thickness in the limiting case of zero shear (Ling Miao, unpublished results).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.