Abstract
Phase equilibria in the poly(dimethylsiloxane)(PDMS)—polydiethylsiloxane (PDES) system in the amorphous and liquid-crystal states were studied by optical interferometry. The findings obtained were compared with the data of calorimetric measurements. The experiments were carried out in a wide range of molecular weights and temperatures, and the phase diagrams were constructed. Thermodynamic analysis of the experimental data was performed in the framework of the Flory—Haggins theory for polymeric solutions. The analytical expressions for calculation of the pair interaction parameter using the binodal and liquidus curves were obtained. The pair interaction parameters of polymers and their dependences on the temperature and molecular weight were determined. The pair interaction parameter was shown to decrease with increasing the molecular weight of the oligomer component, approaching asymptotically a limiting value, which characterizes the interaction of the high molecular-weight PDMS and PDES. It was shown that the phase equilibria in the PDMS—PDES systems can be predicted quantitatively and qualitatively.
Similar content being viewed by others
References
V. N. Kuleznev, Smesi polimerov [Polymer Blends], Khimiya, Moscow, 1980, 304 pp. (in Russian).
Polymer Blends, Eds. D. R. Paul and S. Newman, Academic Press, New York, 1978, 1; 2.
Multicomponent Polymer Systems, Ed. R. F. Gould, Am. Chem. Soc., Washington, 1973.
I. M. Rabinovich, Primenenie polimerov v meditsine [The Use of Polymers in Medicine], Meditsina, Leningrad, 1972, 198 pp. (in Russian).
V. S. Papkov, Yu. K. Godovskii, and V. S. Svistunov, Vysokomol. Soedin., Ser. A, 1989, 31, 1577 [Polym. Sci. USSR, Ser. A, 1989, 31 (Engl. Transl.)].
V. Papkov, A. Turetsky, G. J. Out, and M. Moeller, Int. J. Polym. Mat., 2002, 51, 369.
T. M. Radzhabov, Yu. D. Shibanov, and Yu. K. Godovskii, Vysokomol. Soedin., Ser. A, 1988, 30, 1667 [Polym. Sci. USSR, Ser. A, 1988, 30 (Engl. Transl.)].
Oligoorganosiloksany. Svoistva, poluchenie, primenenie [Oligoorganosiloxanes. Properties, Synthesis, and Application], Ed. M. V. Sobolevskii, Khimiya, Moscow, 1985, 264 pp. (in Russian).
V. S. Papkov, Yu. K. Godovsky, V. S. Svistunov, V. M. Litvinov, and A. A. Zhdanov, J. Polym. Sci., Polym. Chem., 1984, 22, 3617.
A. Ya. Malkin and A. E. Chalykh, Diffuziya i vyazkost' polimerov. Metody izmereniya [Diffusion and Viscosity of Polymers. Measurement Techniques], Khimiya, Moscow, 1979, 304 pp. (in Russian).
A. E. Chalykh, A. I. Zagaitov, V. V. Gromov, and D. P. Korotchenko, Opticheskii diffuziometr ODA-2 [Optical Diffusiometer ODA-2], Institute of Physical Chemistry, Russian Academy of Sciences, Moscow, 1996, 36 pp. (in Russian).
A. E. Chalykh, A. Avgonov, E. M. Chaika, V. K. Gerasimov, V. S. Papkov, A. Yu. Rabkina, and B. G. Zavin, Vysokomol. Soedin., Ser. A, 2002, 44, 1771 [Polym. Sci., Ser. A, 2002, 44, No. 10 (Engl. Transl.)].
F. A. Avgonova, Ph. D. Thesis (Fiz. Math.), Institute of Physical Chemistry, Russian Academy of Sciences, Moscow, 2000, 144 pp. (in Russian).
T. M. Radzhabov, Ph. D. Thesis (Fiz. Math.), L. Ya. Karpov Reasearch Institute for Physical Chemistry, Moscow, 1990, 150 pp. (in Russian).
Polymer Blends, Eds. D. R. Paul and C. B. Bucknall, Wiley, New York, 2000, 599 pp.
V. K. Gerasimov, A. E. Chalykh, and A. Avgonov, Vysokomol. Soedin., Ser. A, 2003, 45, 409 [Polym. Sci., Ser. A., 2003, 45, No. 3 (Engl. Transl.)].
P. J. Flory, Principles of Polymer Chemistry, Cornell. Univ. Press, New York, 1953, 594 pp.
V. I. Klenin, Termodinamika sistem s gibkotsepnymi polimerami [Thermodynamics of Systems of Flexible-chain Polymers], Izd-vo SGU, Saratov, 1995, 734 pp. (in Russian).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chaika, E.M., Chalykh, A.E., Gerasimov, V.K. et al. Phase state diagrams of the poly(dimethylsiloxane)—poly(diethylsiloxane) system. Russian Chemical Bulletin 52, 1340–1346 (2003). https://doi.org/10.1023/A:1024870926141
Issue Date:
DOI: https://doi.org/10.1023/A:1024870926141