Temperature Dependence of the Hydrodynamic and Conformational Properties of Hyperbranched Polycarbosilanes |
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| Authors: | Alina I. Amirova Natalia A. Sheremetyeva Alexander P. Filippov |
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| Affiliation: | 1. Institute of Macromolecular Compounds of Russian Academy of Sciences , Saint Petersburg , Russia aliram@rambler.ru;3. N.S. Enicolopov Institute of Synthetic Polymer Materials of Russian Academy of Sciences , Moscow , Russia;4. Institute of Macromolecular Compounds of Russian Academy of Sciences , Saint Petersburg , Russia |
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| Abstract: | Three types of carbosilane hyperbranched polymers were studied in dilute solution in toluene. The samples had different lengths of chains between branch points and the structure of terminal groups (butyl, undecenyl, or fluorine containing). The temperature dependences of intrinsic viscosity and second virial coefficient values were determined by viscometry and static light scattering methods. It is shown that conformational characteristics of hyperbranched polycarbosilanes do not depend on the thermodynamic quality of a solution in the wide range of temperatures. |
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| Keywords: | Conformation Hyperbranched polymer Light scattering Polycarbosilanes Viscometry |
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