Local motion of crosslinks for poly (methyl methacrylate) gels by the fluorescence depolarization method
Tóm tắt
Poly(methyl methacrylate) (PMMA) gels labeled at crosslinks with anthracene were prepared. Anthracene fluorescence depolarization was monitored to probe the local motion of crosslinks for PMMA gels at different equilibrium swelling states. The relaxation times and the activation energies of local motion were measured for PMMA gels at the swollen states in various solvents through fluorescence anisotropy decays. The local motion of PMMA gel at crosslinks became faster with the increase of swelling ratio. When the swelling ratios were almost the same, the mobility of crosslinks was the same irrespective of the molecular weights between crosslinks. These results indicate that the local motion of crosslinks for PMMA gel is mainly governed by the segment density of network chains in the vicinity of crosslinks.
Tài liệu tham khảo
Ferry, J. D. “Viscoelastic Properties of Polymers”, 2nd Ed.; John Wiley and Sons: New York, 1970.
Sato, E.; Tanaka, T. J. Chem. Phys. 1988, 89, 1695.
Kaneko, Y.; Sakai, K.; Kikuchi, A.; Yoshida, R.; Sakurai, Y.; Okano, T. Macromolecules 1995, 28, 7717.
Geissler, E.; Hecht, A. M. Macromolecules 1980, 13, 1276.
Urayama, K.; Takigawa, T.; Masuda, T. Macromolecules 1993, 26, 3092.
Geissler, E.; Horkay, F.; Hecht, A. M.; Zrinyi, M. J. Chem. Phys. 1989, 90, 1924.
Horkay, F.; Zrinyi, M.; Geissler, E.; Hecht, A. M. Makromol. Chem., Macromol. Symp. 1990, 40, 195.
Eichinger, B. E. Ann. Rev. Phys. Chem. 1983, 34, 359.
Tanaka, T.; Hocker, L. O.; Benedek, G. B. J. Chem. Phys. 1973 59, 5151.
Joosten, J. G. H.; McCarthy, J. L. Macromolecules 1991, 24, 6690.
Takebe, T.; Nawa, K.; Suehiro, S.; Hashimoto, T. J. Chem. Phys. 1989, 91, 4160.
Takahashi, H.; Shibayama, M.; Fujisawa, H.; Nomura, S. Macromolecules 1995, 28, 8824.
Tokuhiro, T.; Amiya, T.; Mamada, A.; Tanaka, T. Macromolecules 1991, 24, 2936.
Ikehara, T.; Nishi, T.; Hayashi, T. Polym. J. 1996, 28, 169.
Hu, Y.; Horie, K.; Torii, T.; Ushiki, H.; Tang, X. Polym. J. 1993, 25, 123.
Hu, Y.; Horie, K.; Ushiki, H.; Tsunomori, F. Eur. Polym. J. 1993, 29, 1365.
Ediger, M. D. Ann. Rev. Phys. Chem. 1991, 42, 225.
Fytas, G.; Dorfmüller, Th.; Lin, Y. H.; Chu, B. Macromolecules 1981, 14, 1088.
Heinrich, G.; Vilgis, T. A. Macromolecules 1992, 25, 404.
Sasaki, T.; Yamamoto, M.; Nishijima, Y. Macromolecules 1988, 21, 610.
Sasaki, T.; Nawa, K.; Yamamoto, M; Nishijima, Y. Eur. Polym. J. 1989, 25, 79.
Horinaka, J.; Ono, K.; Yamamoto, M. Polym. J. 1995, 27, 429.
Ono, K.; Sasaki, T.; Yamamoto, M. Macromolecules 1995, 28, 5012.
Ono, K.; Ueda, K.; Yamamoto, M. Polym. J. 1994, 26, 1345.
Ono, K.; Okada, Y; Yokotsuka, S.; Sasaki, T.; Yamamoto, M. Macromolecules 1994, 27, 6482.
Krakovyak, M. G.; Ananieva, T. D.; Skorokhodov, S. S. Synth. Comm. 1977, 7, 397.
Krakovyak, M. G.; Ananieva, T. D.; Anufrieva, E.; Gotlib, Y.; Nekrasova, T.; Skorokhodov, S. Macromol. Chem. 1981, 182, 1009.
Flory, P. J. “Principles of Polymer Chemistry”, Cornell Univ. Press.: Ithaca, New York, 1953.
Konak, C.; Tuzar, Z.; Jakes, J. Polymer 1990, 31, 1866.
O’Conner, D. V.; Phillips, D. “Time-Correlated Single-Photon Counting”, Academic Press, London, 1984.
Kramers, H. A. Physica 1940, 7, 284.