Effects of temperature and concentration factors on the conformational state and reactivity of potassium poly(oxyethylene glycolate)

With the use of pulsed magnetic-field gradient NMR, self-diffusion coefficients of potassium poly(oxyethylene glycolate) macromolecules and solvent molecules (acetone) and the variation in the dimensions of supramolecular structures of potassium poly(oxyethylene glycolate) with temperature and its c...

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Bibliographic Details
Published in:Polymer science. Series A, Chemistry, physics Chemistry, physics, 2010-09, Vol.52 (9), p.914-918
Main Authors: Davletbaeva, I. M., Shkodich, V. F., Gumerov, A. M., Vasil’ev, G. I.
Format: Article
Language:eng ; rus
Subjects:
Acetone
Chemistry
Chemistry and Materials Science
Concentration gradient
Diisocyanates
Dimensional measurements
Macromolecules
Polymer Sciences
Potassium
Rate constants
Solutions
Solvents
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Summary:With the use of pulsed magnetic-field gradient NMR, self-diffusion coefficients of potassium poly(oxyethylene glycolate) macromolecules and solvent molecules (acetone) and the variation in the dimensions of supramolecular structures of potassium poly(oxyethylene glycolate) with temperature and its concentration in acetone are measured. It is discovered that the temperature dependences of change in the rate constants of reactions that proceed during the interaction of potassium poly(oxyethylene glycolate) with 2,4-toluylene diisocyanate do not fit Arrhenius coordinates.
ISSN:0965-545X
1757-1820
1555-6107
DOI:10.1134/S0965545X10090063