Shear-induced structure in polymer blends with viscoelastic asymmetry

Journal of Chemical Physics

Volumn 117, Issue 13, 2002, Pages 6350-6359

  Hobbie, E K ^a   Jeon, H S ^a   Wang, H ^a   Kim, H ^a   Stout, D J ^a   Han, C C ^a  

^a NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COMPOSITION; LIGHT SCATTERING; MORPHOLOGY; OPTICAL MICROSCOPY; POLYISOPRENES; RHEOLOGY; SHEAR STRENGTH; STRUCTURE (COMPOSITION); SYNTHESIS (CHEMICAL); VISCOELASTICITY; VISCOUS FLOW; VOLUME FRACTION;

SHEAR RATE; VISCOELASTIC SYMMETRY;

POLYMER BLENDS;

EID: 0036806473     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1503769     Document Type: Article

References (46)

1. L. A. Utracki, Polymer Alloys and Blends (Hanser, New York, 1990)
2. H. Yang, H. Zhang, P. Moldenaers, and J. Mewis, Polymer 39, 5731 (1998)
3. J. Vermant, P. Van Puyvelde, P. Moldenaers, J. Mewis, and G. Fuller, Langmuir 14, 1612 (1998)
4. H. Gerard, J. S. Higgins, and N. Clarke, Macromolecules 32, 5411 (1999)
5. A. Silverburg and W. Kuhn, J. Polym. Sci. 13, 21 (1954)
6. T. Takebe, R. Sawaoka, and T. Hashimoto, J. Chem. Phys. 91, 4369 (1989)
7. T. Hashimoto, T. Takebe, and K. Asakawa, Physica A 194, 338 (1993)
8. L. Levitt, C. W. Macosko, and S. D. Pearson, Polym. Eng. Sci. 36, 1647 (1996)
9. F. Mighri and M. A. Hureault, J. Rheol. 45, 783 (2001)
10. K. B. Migler, ibid. 44, 277 (2000)
11. E. K. Hobbie and K. B. Migler, Phys. Rev. Lett. 82, 5393 (1999)
12. T. Hashimoto, K. Matsuzuka, E. Moses, and A. Onuki, Phys. Rev. Lett. 74, 126 (1995)
13. L. Kielhorn, R. H. Colby, and C. C. Han, Macromolecules 33, 2486 (2000)
14. S. Kim, E. K. Hobbie, J. Yu, and C. C. Han, Macromolecules 30, 8245 (1997)
15. H. S. Jeon and E. K. Hobbie, Phys. Rev. E 63, 061403 (2001)
16. H. S. Jeon, A. I. Nakatani, E. K. Hobbié, and C. C. Han, Langmuir 17, 3087 (2001)
17. Z. Hong, M. T. Shaw, and R. A. Weiss, Polymer 41, 5895 (2000)
18. Z. Hong, M. T. Shaw, and R. A. Weiss, Macromolecules 31, 6211 (1998)
19. In this paper, materials, instruments, and services are specified in order to give a detailed account to the work and do not imply an endorcement by NIST or the Federal Government
20. S. Kim, J.-W. Yu, and C. C. Han, Rev. Sci. Instrum. 67, 3940 (1996)
21. A somewhat similar shear apparatus has been reported by K. Matsuzaka and T. Hashimoto, ibid. 70, 2387 (1999)
22. J. Brandrup and E. H. Immergut, Polymer Handbook, 3rd ed. (Wiley-Interscience, New York, 1989), Chap. IV, p. 455
23. R. B. Bird, R. C. Armstrong, and O. Hassager, Dynamics of Polymeric Liquids (Wiley, New York, 1987), Vol. 1
24. 1/2, where φ is the area fraction of droplets. Based on the measured (mean) area fractions obtained from the images, this simple formula gives φ = 0.20, 0.35 and 0.75 for true volume fractions of 0.20, 0.40, and 0.80, respectively, ensuring that the procedure. although approximate, is consistent
25. E. Moses, T. Kume, and T. Hashimoto, Phys. Rev. Lett. 72, 2037 (1994)
26. Y. W. Lee, Statistical Theory of Communication (Wiley, New York, 1960)
27. P. Debye, H. R. Anderson, and H. Brumberger, J. Appl. Phys. 28, 679 (1957)
28. This asymmetry, although not immediately evident in the upper-left micrograph of Fig. 2, can be seen in the local director field in the lower-right panel. Some asymmetry of this type was invariably present in many of the images, although to varying degrees. The peaks are not artifacts, in the sense that the positions are reproducible and insensitive to the degree of asymmetry, which is controlled by slightly varying the angle between the axis of illumination and ŷ. We note, however, that when p(θ) is broadly peaked around the vorticity direction (Θ = 0), our data are not of sufficient quality to resolve any true higher-order peaks in the distribution, and Θ must be regarded aa cutoff in this case
29. E. Anczurowski and S. G. Mason, J. Colloid Interface Sci. 23, 533 (1967)
30. J. M. Rallison, Annu. Rev. Fluid Mech. 16, 45 (1984)
31. When the matrix phase is more elastic than the droplet phase, it can be argued (see E. K. Hobbie and K. B. Migler, Ref. 9) that the tendency for vorticity elongation is replaced by vorticity contraction, which might favor domains that are extended along the flow direction
32. G. Ver Strate and W. Phillipoff, J. Polym. Sci. Polym. Lett. 12, 267 (1974)
33. C. Rangel-Nafaile, A. B. Metzner, and K. F. Wissbrun, Macromolecules 17, 1187 (1984)
34. T. Hashimoto and K. Fujioka, J. Phys. Soc. Jpn. 60, 356 (1991)
35. X. L. Wu, D. J. Pine, and P. K. Dixon, Phys. Rev. Lett. 66, 2408 (1991)
36. J. W. van Egmond, D. E. Werner, and G. Fuller, J. Chem. Phys. 96, 7742 (1992)
37. J. Yu et al., Phys. Rev. Lett. 78, 2664 (1997)
38. E. K. Hobbie et al., Phys. Rev. E 54, R5909 (1996)
39. Z. Shou and A. Chakrabarti, Phys. Rev. E 61, R2200 (2000)
40. A. I. Nakatani et al., Phys. Rev. Lett. 79, 4693 (1997)
41. K. Krishnan, K. Almdal, W. R. Burghardt, T. P. Lodge, and F. S. Bates, Phys. Rev. Lett. 87, 098301 (2001)
42. H. Tanaka, Phys. Rev. Lett. 76, 787 (1996)
43. H. Tanaka and T. Araki, ibid. 78, 4966 (1997)
44. A. Bhattachayra, S. D. Mahanti, and A. Chakrabarti, Phys. Rev. Lett. 80, 333 (1998)
45. T. Taniguchi and A. Onuki, Phys. Rev. Lett. 77, 4910 (1996)
46. N. Toyoda, M. Takenaka, S. Saito, and T. Hashimoto, Polymer 42, 9193 (2001)