Functionality-type distribution of poly(ethylene oxide) and poly(propylene oxide) macromonomers: Critical-chromatography study

Functionality-type distributions of macromomoners with poly(ethylene oxide) and poly(propylene oxide) chains are studied by chromatography under critical conditions. It is shown that, in the critical separation mode, separation of macromolecules with respect to size disappears and only information o...

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Bibliographic Details
Published in:Polymer science. Series A, Chemistry, physics Chemistry, physics, 2013, Vol.55 (1), p.61-64
Main Authors: Rozdina, I. G., Filatova, N. N., Gorshkov, A. V., Evreinov, V. V.
Format: Article
Language:English
Subjects:
Analytical Procedures
Approximation
Chemistry
Chemistry and Materials Science
Chromatography
Gaussian
Macromolecules
Mathematical analysis
Oxides
Polymer Sciences
Separation
Silica gel
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Summary:Functionality-type distributions of macromomoners with poly(ethylene oxide) and poly(propylene oxide) chains are studied by chromatography under critical conditions. It is shown that, in the critical separation mode, separation of macromolecules with respect to size disappears and only information on the functionality-type distributions of the test samples may be derived. The critical conditions are determined experimentally with a normal phase (unmodified silica gel) for poly(propylene oxide) and with a reversed phase C 18 for poly(ethylene oxide). The experimental retention volumes for bifunctional macromolecules are in satisfactory agreement with the values calculated under approximation of the Gaussian chain model.
ISSN:0965-545X
1555-6107
DOI:10.1134/S0965545X13010057