Abstract
Dynamic viscoeasticity of poly(vinyl alcohol) with high isotacticity (HI-PVA, mm=0.78), being derived from tert-butyl vinyl ether, was investigated to compare with that of syndiotactc PVA (S-PVA, mm=0.14) and commercial atactic PVA (A-PVA, mm=0.22). In the non-crystalline region, the βa (local twisting motion) and αa (micro-Brownian motion) dispersions occurring at around −10 °C and 70 °C were nearly the same, in both magnitude and location, for the HI-PVA and S-PVA having an almost identical degree of crystallinity. On the other hand, in the crystalline region, the βc and αc dispersions of HI-PVA were somewhat different from those of ordinary PVAs. The βc dispersion (local motion in crystals due to defects) was clearly observed for HI-PVA but not for S-PVA and A-PVA. The αc dispersion (axial motion of the chain in the crystal lattices) was observed for all PVA films but its temperature increased in the order of HI-PVA > S-PVA > A-PVA, which well corresponded to the order of the melting temperature and 13C spin-lattice relaxation time (T1C) of each stereoregular PVA. These differences may be attributed to a difference of the magnitude of intermolecular and/or intramolecular hydrogen bonding in the crystals of respective PVAs. Specifically, the successive intramolecular bonding in the HI-PVA crystal appears to reduce the magnitude of the intermolecular bonding thereby allowing the chain to exhibit the βc motion. This successive bonding would also stiffen the chain backbone thereby increasing the αc dispersion temperature.
Similar content being viewed by others
Article PDF
References
K. Fujii, J. Polym. Sci., Part D, 5, 431 (1971).
“Polyvinyl Alcohol-Developments,” C. A. Finch, Ed., John Wiley & Sons, New York, 1992, chap. 9 and 10.
“Polyvinyl Alcohol,” C. A. Finch, Ed., John Wiley & Sons, New York, 1973, chap. 6 and 10.
S. Murahasi, H. Yuki, T. Sano, U. Yonemura, T. Tadokoro, and Y. Chatani, J. Polym. Sci., S77, 62 (1962).
H. Yuki, K. Hatada, K. Oda, H. Kinoshita, S. Murahashi, K. Ono, and Y. Ito, J. Polym. Sci., Part A-1, 7, 1517 (1969).
S. Okamura, T. Kodama, and T. Higashimura, Makromol. Chem., 53, 180 (1962).
T. Higashimura, K. Suzuki, and S. Okamura, Makromol. Chem., 86, 259 (1965).
S. Murahashi, S. Nozakura, and M. Sumi, J. Polym. Sci. Part B, 3, 245 (1965).
S. Murahashi, S. Nozakura, M. Sumi, H. Yuki, and K. Hatada, J. Polym. Sci., Polym. Lett. Ed., 4, 65 (1966).
Kobunshi Kagaku, 23, 550 (1966).
H. Ohgi and T. Sato, Macromolecules, 26, 559 (1993).
H. Ohgi and T. Sato, Macromolecules, 32, 2403 (1999).
H. Ohgi and T. Sato, Polymer, 43, 3829 (2002).
F. Horii, S. Hu, K. Deguchi, H. Sugisawa, H. Ohgi, and T. Sato, Macromolecules, 29, 3330 (1996).
H. Ohgi, T. Sato, S. Hu, and F. Horii, Polymer, 47, 1324 (2006).
A. Nagai and M. Takayanagi, Kogyo Kagaku Zassi, 68, 96 (1965).
T. Yamamoto, S. Yoda, H. Takase, O. Sangen, R. Fukae, M. Kamachi, and T. Sato, Polym. J., 23, 185 (1991).
T. Moritani, I. Kuruma, K. Shibatani, and Y. Fujiwara, Macromolecules, 5, 577 (1972).
J. R. DeMember, H. C. Haas, and R. L. MacDonald, J. Polym. Sci., Polym. Lett. Ed., 10, 385 (1972).
A. Nagai and M. Takayanagi, Kogyo Kagaku Zasshi, 68, 836 (1965).
K. Sugiura, M. Hashimoto, S. Matsuzawa, and K. Yamaura, J. Appl. Polym. Sci., 82, 1291 (2001).
K. Shiraishi, K. Ishikawa, and K. Miyasaka, Kobunshi Kagaku, 21, 588 (1964).
T. Yano, Busseiron Kenkyu, 94, 176 (1956).
R. Fukae, T. Yamamoto, H. Masago, N. Kawatsuki, O. Sangen, and M. Kamachi, Sen’i Gakkaishi, 53, 195 (1997).
R. K. Tubbs, J. Polym. Sci., 3, 4181 (1965).
K. Masuda, H. Kaji, and F. Horii, Polym. J., 33, 356 (2001).
H. Ohgi, H. Yang, T. Sato, and F. Horii, to be published.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Ohgi, H., Sato, T., Watanabe, H. et al. Highly Isotactic Poly(vinyl alcohol) Derived from tert-Butyl Vinyl Ether V. Viscoelastic Behavior of Highly Isotactic Poly(vinyl alcohol) Films. Polym J 38, 1055–1060 (2006). https://doi.org/10.1295/polymj.PJ2005235
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1295/polymj.PJ2005235