Macromolecules, volume 51, issue 20, pages 7964-7973
Salt-Induced Thermoresponsivity of a Cationic Phosphazene Polymer in Aqueous Solutions
Publication type: Journal Article
Publication date: 2018-10-02
Journal:
Macromolecules
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 5.5
ISSN: 00249297, 15205835
Materials Chemistry
Organic Chemistry
Inorganic Chemistry
Polymers and Plastics
Abstract
Poly(ethylaminophosphazene) (PEAP) in salt-free aqueous solution does not reveal thermoresponsive properties but acquires thermoresponsivity upon addition of various poly(protic acid)s. Energetics of the salt-induced phase separation transition of the PEAP solutions upon heating was investigated by high-sensitivity differential scanning calorimetry at pH 3.5. At low concentrations of poly(carboxylic acid)s (10–100 mM), the transition temperature and enthalpy vary from 90 to 25 °C and from 1.5 to 35 J g–1, respectively, depending on the pKa1 and the apparent hydrophobicity of the acids. Dependences of the transition parameters (Tt, Δth, and Δtcp) on the citrate buffer concentration were obtained. The binding curve of citrate anions to PEAP was derived. High concentrations of sulfate anions (0.1–0.8 M) induced a marginal phase transition at high temperatures. A mechanism of the PEAP thermoresponsivity is proposed. The Okado–Tanaka model for cooperative hydration of macromolecules is used to quantitatively d...
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Burova T. V. et al. Salt-Induced Thermoresponsivity of a Cationic Phosphazene Polymer in Aqueous Solutions // Macromolecules. 2018. Vol. 51. No. 20. pp. 7964-7973.
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Burova T. V., Grinberg V. Y., Grinberg N. V., S. Dubovik A., Moskalets A. P., Papkov V. S., Khokhlov A. R. Salt-Induced Thermoresponsivity of a Cationic Phosphazene Polymer in Aqueous Solutions // Macromolecules. 2018. Vol. 51. No. 20. pp. 7964-7973.
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TY - JOUR
DO - 10.1021/acs.macromol.8b01621
UR - https://doi.org/10.1021%2Facs.macromol.8b01621
TI - Salt-Induced Thermoresponsivity of a Cationic Phosphazene Polymer in Aqueous Solutions
T2 - Macromolecules
AU - Burova, Tatiana V
AU - Papkov, Vladimir S.
AU - Grinberg, Valerij Y
AU - Grinberg, Natalia V
AU - S. Dubovik, Alexander
AU - Moskalets, Alexander P
AU - Khokhlov, Alexei R.
PY - 2018
DA - 2018/10/02 00:00:00
PB - American Chemical Society (ACS)
SP - 7964-7973
IS - 20
VL - 51
SN - 0024-9297
SN - 1520-5835
ER -
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@article{2018_Burova,
author = {Tatiana V Burova and Vladimir S. Papkov and Valerij Y Grinberg and Natalia V Grinberg and Alexander S. Dubovik and Alexander P Moskalets and Alexei R. Khokhlov},
title = {Salt-Induced Thermoresponsivity of a Cationic Phosphazene Polymer in Aqueous Solutions},
journal = {Macromolecules},
year = {2018},
volume = {51},
publisher = {American Chemical Society (ACS)},
month = {oct},
url = {https://doi.org/10.1021%2Facs.macromol.8b01621},
number = {20},
pages = {7964--7973},
doi = {10.1021/acs.macromol.8b01621}
}
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Burova, Tatiana V., et al. “Salt-Induced Thermoresponsivity of a Cationic Phosphazene Polymer in Aqueous Solutions.” Macromolecules, vol. 51, no. 20, Oct. 2018, pp. 7964-7973. https://doi.org/10.1021%2Facs.macromol.8b01621.
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