Aqueous Size Exclusion Chromatography of Random, Diblock, and ABC Triblock Methacrylic Polyampholytes

Aqueous size exclusion chromatography (SEC) at 1MKCl and pH 8.5 was employed to probe the aggregation behavior of methacrylic polyampholytes. In agreement with earlier results obtained by light scattering techniques, shorter retention times were measured for the triblocks consistent with larger hydr...

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Bibliographic Details
Published in:Journal of colloid and interface science 1996-09, Vol.182 (2), p.326-329
Main Authors: Patrickios, Costas S., Strittmatter, Justin A., Hertler, Walter R., Hatton, T.Alan
Format: Article
Language:English
Subjects:
ABC triblock copolymers
aggregation
aggregation numbers
amphiphiles
Applied sciences
block copolymers
diblock copolymers
Exact sciences and technology
gel permeation chromatography
micellization
Organic polymers
Physicochemistry of polymers
polyampholytes
polyelectrolytes
Properties and characterization
random copolymers
size exclusion chromatography
Solution and gel properties
surfactants
water-soluble polymers
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Description
Summary:Aqueous size exclusion chromatography (SEC) at 1MKCl and pH 8.5 was employed to probe the aggregation behavior of methacrylic polyampholytes. In agreement with earlier results obtained by light scattering techniques, shorter retention times were measured for the triblocks consistent with larger hydrodynamic size and, therefore, chain aggregation into micellar structures; the two random terpolymers and the diblock polyampholyte showed no aggregation behavior as their retention times corresponded closely to the expected single-chain molecular weights. Micellar aggregation numbers were estimated to be within the range from 10 to 40.
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1996.0471