Abstract
Specific heat of semicrystalline and glassy poly(oxacyclobutane) was measured from 90 to 320 °K by using an adiabatic calorimeter and the following thermodynamic values were determined: Tg=195 °K, ΔCp (at Tg) =0.895 J/g°K, T2=155 °K, S0=0.189 J/g°K, Tm=305 °K, ΔHm=162.5 J/g°K and ΔSm=0.533 J/g°K.As for the hydrated poly(oxacyclobutane), isotherms and dissociation pressures were measured from −25 to 20°C. The result confirmed that water molecules in the hydrated poly(oxacyclobutane) exist as stoichiometric water in the crystalline part of the solid polymer. The temperature dependence of the dehydration pressures was also represented by the following equation; logP=10.82−2.93×103T−1, and the dissociation heat was evaluated to be 3.25×103 J/mol.
Similar content being viewed by others
Log in or create a free account to read this content
Gain free access to this article, as well as selected content from this journal and more on nature.com
or
References
H. Tadokoro, Y. Takahashi, Y. Chatani, and H. Kakida, Makromol. Chem., 109, 96 (1967).
J. B. Rose, J. Chem. Soc., 542, 546 (1956).
N. Onodera, M. Sakiyama, and S. Seki, Kotai Butsuri (Solid State Physics), 3, 210 (1968).
N. Onodera, M. Sakiyama, and S. Seki, to be published in Bull. Chem. Soc. Jpn.
S. Seki and H. Chihara, Bull. Chem. Soc. Jpn., 32, 898 (1959).
P. J. Flory, "Principles of Polymer Chemistry", Cornell Univ. Press, New York, N. Y., 1953, p. 563.
E. Passaglia and H. K. Kevorikian, J. Appl. Phys., 34, 90 (1963).
F. E. Karasz and J. M. O'Reilly, J. Phys. Chem., 69, 2657 (1965).
M. Dole, J. Polym. Sci., Part C, No. 18, 57 (1967).
J. H. Gibbs and E. A. Dimarzio, J. Chem. Phys., 28, 273 (1958).
B. Wunderlich, J. Phys. Chem., 64, 1052 (1960).
J. Lai and G. S. Trick, J. Polym. Sci., 50, 31 (1961).
W. H. Linton and H. H. Goodman, J. Appl. Polym. Sci., 1, 179 (1959).
R. H. Beaumont, B. Clegg, G. Gee, J. B. M. Herbert, D. J. Marks, R. C. Roberts, and D. Sims, Polymer, 7, 401 (1966).
R. Chiang and P. J. Flory, J. Am. Chem. Soc., 83, 2857 (1961).
K. Miki, Kobunshi Kagaku (Chem. High Polymers), 21, 594 (1964).
G. Champetier, J. Polym. Sci., 10, 223 (1953).
P. H. Hermans, "Physics and Chemistry of Cellulose Fibers", Elsevier Pub. Co. Inc., New York, N. Y., 1949, p 24.
K. Ishikawa et al., Kobunshi Kagaku (Chem. High Polymers), 25, 50 (1968).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Yoshida, S., Sakiyama, M. & Seki, S. Thermodynamic Studies of Solid Polyethers. I. Poly(oxacyclobutane), [–(CH2)3O–]n and Its Hydrate. Polym J 1, 573–581 (1970). https://doi.org/10.1295/polymj.1.573
Issue date:
DOI: https://doi.org/10.1295/polymj.1.573
Keywords
This article is cited by
-
Effect of molecular weight and temperature on the isothermal crystallization of poly(oxetane)
Colloid & Polymer Science (1984)
