Abstract
A novel microcellular porous structure, the product of a small proportion of a semi-crystalline thermoplastic elastomer (TPE) and a large proportion of low molecular weight oil, is examined. The structure is formed by the phase separation of a homogeneous mixture of TPE and oil. The system exhibits a unique three-dimensional continuous polymer network consisting of interconnected spherical cells of a few tens of micrometers in diameter. The detailed phase separation process is investigated utilizing optical microscopy, SEM, and DSC. A modulated structure, apparently attributable to spinodal decomposition, is observed in the initial stage of phase separation. However, during its evolution, this structure evolves into a clear network structure of a polymer-rich phase and clusters of a spherical oil-rich phase. Time evolution of D of a typical structure during the phase separation process at constant temperature is estimated to be D in proportion to t1 in the initial stage and D in proportion to t1/3 in the late stage. The character and role of differences in Mw of components in the phase separation of the TPE/oil system are discussed in relation to the results of other studies.
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References
I. M. Lifshiz and V. V. Slyozov, J. Phys. Chem. Solids, 19, 35 (1961).
J. W. Cahn, J. Phys. Chem., 41, 93 (1965).
K. Binder and D. Stauffer, Phys. Rev. Lett., 33, 1006 (1974).
E. D. Siggia, Phys. Rev. A, 20, 595 (1979).
T. Hashimoto, J. Kumaki, and H. Kawai, Macromolecules, 16, 541 (1983).
H. L. Snyder and P. J. Meakin, J. Chem. Phys., 79, 5588 (1983).
N. Kuwahara, H. Sato, and K. Kuboto, J. Chem. Phys. Commun., 97, 5905 (1992).
F. J. Bates and P. J. Wilzius, Chem. Phys., 92, 3208 (1989).
T. Izumitani and T. Hashimoto, J. Chem. Phys., 83, 3694 (1985).
A. E. Ribbe and T. Hashimoto, Macromolecules, 30, 3999 (1997).
H. Jinnai, T. Koga, Y. Nishikawa, T. Hashimoto, and S. T. Hyde, Phys. Rev. Lett., 78, 2248 (1997).
H. Jinnai, Y. Nishikawa, H. Morimoto, T. Koga, and T. Hashimoto, Langumuir, 16, 4380 (2000).
L. Niklas, A. Altskar, and A.-M. Hermansson, Macromolecules, 34, 8117 (2001).
Y. Fukahori and N. Mashita, Polym. Prepr. Jpn., 44, 1738 (1995).
Y. Fukahori and N. Mashita, Polym. Prepr. Jpn., 44, 1740 (1995).
Y. Fukahori and N. Mashita, Polym. Adv. Technol., 11, 472 (2000).
T. Hashimoto, M. Takenaka, and T. Izumitani, J. Chem. Phys., 97, 679 (1992).
J. Lauger, R. Lay, and W. Gronski, J. Chem. Phys., 101, 7181 (1994).
B. Crist, Macromolecules, 29, 7276 (1996).
H. Takeno, M. Iwata, M. Takenaka, and T. Hashimoto, Macromolecules, 33, 9657 (2000).
H. Tanaka, J. Chem. Phys., 100, 5323 (1994).
H. Tanaka, J. Phys.: Condens. Matter, 12, 207 (2000).
T. Araki and H. Tanaka, Macromolecules, 34, 1953 (2001).
H. Jinnai, T. Koga, Y. Nishikawa, T. Hashimoto, and T. S. Hyde, Phys. Rev. Let., 78, 2248 (1997).
H. Jinnai, Y. Nishikawa, H. Morimoto, T. Koga, and T. Hashimoto, Langmuir, 16, 4380 (2000).
S. Kobayashi, “Differential Geometry of Curves and Surfaces”, Shokabo, Tokyo, 1995, chapt. 2.
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Mashita, N., Fukahori, Y. Superstructure Formation in Thermoplastic Elastomer and Oil Systems. Formation of a Novel Microcellular Porous Structure. Polym J 34, 719–726 (2002). https://doi.org/10.1295/polymj.34.719
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DOI: https://doi.org/10.1295/polymj.34.719
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