Behavior of thermosensitive graft copolymer with aromatic polyester backbone and poly-2-ethyl-2-oxazoline side chains in aqueous solutions |
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| Authors: | A A Kudryavtseva M P Kurlykin A V Tenkovtsev A P Filippov |
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| Institution: | Institute of Macromolecular Compounds, Russian Academy of Sciences, Saint-Petersburg, Russia |
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| Abstract: | Thermoresponsive graft copolymers with alkylene-aromatic polyester main chain and poly-2-ethyl-2-oxazoline side chains were synthesized. Two copolymer samples which differed in grafting density (0.5 and 0.7) were studied using dynamic and static light scattering and turbidimetry in aqueous solutions at concentration 0.0053?g?cm?3. Hydrodynamic radii of scattering objects and their contribution to light scattering were obtained as a function of temperature in a wide temperature interval. Temperatures of phase separation were found out. Effect of grafting density on the copolymer behavior in aqueous solutions upon heating was determined. In particular, the phase separation temperature reduces with the decreasing grafting density. |
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| Keywords: | Aggregation grafting density light scattering and turbidimetry phase separation thermoresponsive graft copolymer |
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