Abstract
A number of polydimethylsiloxanes containing different amounts of 10-carboxydecyl modifying units arranged along the chain and at chain ends are synthesized. The copolymers are characterized by nuclear magnetic resonance, gel permeation chromatography, and differential scanning calorimetry. In modified siloxanes, an increase in temperature leads to the appearance of a spatial network due to the formation of physical network junctions. The effect of temperature, molecular weight of polymers, number of modifying substituents, and their location on the rheological properties of the copolymers and networks based on them is revealed.
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ACKNOWLEDGMENTS
The GPC and NMR studies of the samples were carried out at the Shared Research Center for Polymer Research, Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences.
Rheological measurements were carried out at the Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, and were supported by the Ministry of Science and Higher Education of the Russian Federation.
DSC results were obtained using the equipment of the Educational and Scientific Center for Functional Materials and Nanomaterials, Moscow State Pedagogical University, and were supported by the Ministry of Science and Higher Education of the Russian Federation.
Funding
This work was supported by the Russian Foundation for Basic Research (project no. 18-03-00637) and the Ministry of Science and Higher Education of the Russian Federation (grant of the Government of the Russian Federation no. 14.W03.31.0018).
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Vasil’ev, V.G., Gorodov, V.V., Buzin, M.I. et al. Physical Crosslinking in Statistical and Telechelic Carboxyl-Containing Polydimethylsiloxanes. Polym. Sci. Ser. A 63, 15–23 (2021). https://doi.org/10.1134/S0965545X21010090
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DOI: https://doi.org/10.1134/S0965545X21010090