Abstract
Cloud point temperature Tclo and dynamic moduli were measured on aqueous solutions of two poly(vinyl methyl ether) (PVME) samples with molecular weight of 1.16×104 and 2.57×104, respectively and Mw/Mn=1.84 for both samples. The Tclo at which the solution becomes turbid is at around 32.5°C without obvious molecular weight dependence due to their broad molecular weight distribution. The frequency ω dependence of the storage modulus G′ and loss modulus G″ observed within linear viscoelasticity region indicates that the PVME/water solution exhibits homogeneous fluid behavior at 25°C below Tclo, while shows a plateau zone for G′ at 34°C above Tclo, suggesting the appearance of network structure at this temperature. A sharp increase in G′ and G″ was observed at about 32.5°C with increasing temperature of a PVME/water solution, indicating that at this temperature the network begin to form. These results imply that the network structure is formed accompanying the phase separation in PVME/water solutions due to the hydrophobic bonding between polymer chains.
Similar content being viewed by others
Article PDF
References
K. te Nijenhuis, Thermoreversible Networks. Adv. Polym. Sci., 130, 1 (1997).
S. Callister, A. Keller, and R. M. Hikmet, Macromol. Chem., Macromol. Symp., 39, 19 (1990).
J. M. Yu, S. Blacher, F. Brouers, G. L’Homme, and R. Jerome, Macromolecules, 30, 4619 (1997).
F. Zeng, X. Zheng, and Z. Tong, Polymer, 39, 1249 (1998).
X. Zheng, Z. Tong, X. Xie, and F. Zeng, Polym. J., 30, 284 (1998).
F. Zeng, Z. Tong, and T. Sato, Sci. in China, Series B, 42, 290 (1999).
Z. Tong, F. Zeng, X. Zheng, and T. Sato, Macromolecules, 32, 4488 (1999).
F. Zeng, X. Liu, Z. Tong, Y. Yang, and S. Wu, Sci. in China, Series B, 43, 428 (2000).
H. G. Schild, Prog. Polym. Sci., 17, 163 (1992).
Y. Hirokawa and T. Tanaka, J. Chem. Phys., 81, 6379 (1984).
F. Zeng, Z. Tong, and H. Feng, Polymer, 38, 5539 (1997).
R. A. Horne, J. P. Almeida, A. F. Day, and N. T. Yu, J. Colloid Interface Sci., 35, 77 (1971).
H. G. Schild and D. A. Tirrell, J. Phys. Chem., 94, 4352 (1990).
J. A. Manson and G. J. Arquette, Macromol. Chem., 37, 18 (1960).
D. Patterson, Macromolecules, 2, 672 (1969).
G. Nemethy and H. A. Scheraga, J. Chem. Phys., 36, 3382 (1962).
G. Nemethy and H. A. Scheraga, J. Chem. Phys., 36, 3401 (1962).
G. Nemethy and H. A. Scheraga, J. Phys. Chem., 66, 1773 (1962).
J. D. Ferry, “Viscoelasticity Properties of polymer”, 3rd ed, John Wiley & Sons, Inc., New York, N.Y., 1980.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Yang, Y., Zeng, F., Xie, X. et al. Phase Separation and Network Formation in Poly(vinyl methyl ether)/Water Solutions. Polym J 33, 399–403 (2001). https://doi.org/10.1295/polymj.33.399
Issue Date:
DOI: https://doi.org/10.1295/polymj.33.399
Keywords
This article is cited by
-
LCST demixing in poly(vinyl methyl ether)/water studied by means of a High Resolution Ultrasonic Resonator
Journal of Thermal Analysis and Calorimetry (2009)