Abstract
The molecular structure of tolylene diurea and poly(dimethylsiloxane) copolymers has been studied by the methods of mechanical and dielectric losses, photoelasticity, and X-ray analysis. The above copolymers are found to experience microphase separation. The radius of gyration of domains formed by the hard blocks based on tolylene diurea was estimated as R ≈ 30 Å. Hard blocks connected by the hydrogen bonds in domains are shown to be perpendicular to directions of the maximum extension of domains. The proposed molecular model of a membrane based on the above copolymer includes a molecular network composed of flexible poly(dimethylsiloxane) chains connected by physical junctions; the above physical junctions are domains formed by the thermodynamically hard blocks of tolylene diurea.
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Original Russian Text © A.E. Grishchenko, D. Roizard, A.P. Petrakov, N.A. Mikhailova, L.N. Andreeva, V.K. Turkov, 2007, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2007, Vol. 49, No. 5, pp. 859–866.
This work was supported by the Russian Foundation for Basic Research (project no. 06-03-32414) and by the Ministry of Education and Science within the program Development of the Scientific Potential of the Higher School (project no. 2.1.1.413).
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Grishchenko, A.E., Roizard, D., Petrakov, A.P. et al. Molecular structure and morphology of membrane-forming copolymers of tolylene diurea and poly(dimethylsiloxane). Polym. Sci. Ser. A 49, 571–577 (2007). https://doi.org/10.1134/S0965545X07050112
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DOI: https://doi.org/10.1134/S0965545X07050112