Abstract
The birefringence, Δn, and the shear stress, σ, were measured after an instantaneous shear deformation for a 10.5% solution of triblock copolymer, poly(methyl methacrylate)-block-polystyrene–block-poly(methyl methacrylate), in polychlorinated biphenyl. Hereafter M stands for methyl methacrylate and S for styrene. The mole fraction of S of the copolymer was 0.4. Measurements were performed at various magnitudes of shear, γ, ranging from 0.4 to 3 and Δn was measured with a light led perpendicularly to the shear plane. Under assumptions that the Δn and σ are sums of independent contributions from M and S blocks and that the stress-optical law holds good for the contribution from each block, the stresses, σM and σS, attributable to the M and S blocks, respectively, were separately evaluated. The result at short times was consistent with the assumption that the chain is uniformly deformed on instantaneous deformation of the material. The ratio σS/σ increased with time. For small γ, the result was consistent with the tube model theory if the ratio σS/σ was regarded as the fraction of stress attributable to the central portion of chain. At large deformations, the increase with time of the ratio was much less than expected from the theory.
Similar content being viewed by others
Article PDF
References
See for example, H. Janeschitz-Kriegl, “Polymer Melt Rheology and Flow Birefringence,” Springer-Verlag, Berlin, 1983.
F. H. Gortemaker, M. G. Hansen, B. de Cindio, H. M. Laun, and H. Janeschitz-Kriegl, Rheol. Acta, 15, 256 (1976).
K. Osaki, N. Bessho, T. Kojimoto, and M. Kurata, J. Rheol., 23, 457 (1979).
K. Osaki, N. Bessho, T. Kojimoto, and M. Kurata, J. Rheol., 23, 617 (1979).
S. Kimura, K. Osaki, and M. Kurata, J. Polym. Sci., Polym. Phys. Ed., 19, 151 (1981).
S. Kimura, K. Osaki, and M. Kurata, J. Polym. Sci., Polym. Phys. Ed., 19, 517 (1981).
See Chapter 2 of ref 1.
M. Doi and S. F. Edwards, J. Chem. Soc., Faraday Trans. 2, 74, 1789 (1979).
M. Doi and S. F. Edwards, J. Chem. Soc., Faraday Trans. 2, 74, 1802 (1978).
P. E. Rouse, J. Chem. Phys., 21, 1272 (1953).
H. Ohnuma, T. Kotaka, and H. Inagaki, Polymer, 10, 501 (1969).
K. Osaki, Y. Nishimura, and M. Kurata, Macromolecules, 18, 1153 (1985).
N. Bessho, K. Osaki, and M. Kurata, Nihon Reoroji Gakkaishi, 5, 68 (1977).
V. N. Tsvetkov, in “Newer Methods of Polymer Characterization,” B. Ke, Ed., Interscience Pub., New York, N. Y., 1964, Chapter 14.
K. Osaki, T. Takatori, M. Kurata, H. Watanabe, and T. Kotaka, to be published.
M. Kitamura, S. Yamamoto, T. Masuda, and S. Onogi, Nihon Reoroji Gakkaishi, 6, 20 (1978).
W. W. Graessley, Adv. Polymer Sci., 47, 67 (1982).
K. Osaki and M. Kurata, Macromolecules, 13, 671 (1980).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Osaki, K., Takatori, E., Kurata, M. et al. Birefringence of a Block Copolymer Solution in the Stress Relaxation Process. Polym J 18, 947–954 (1986). https://doi.org/10.1295/polymj.18.947
Issue Date:
DOI: https://doi.org/10.1295/polymj.18.947
Keywords
This article is cited by
-
Dynamics of each component in miscible blends of polyisoprene and polyvinylethylene
Rheologica Acta (1994)
-
Flow birefringence of disordered block copolymer melts
Rheologica Acta (1992)
-
Relaxation dynamics of selected polymer chain segments and comparison with theoretical models
Rheologica Acta (1990)