Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 81, Issue 7, Pages 1588-1594Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/app.1589
Keywords
size exclusion chromatography; field flow fractionation; light scattering; branching
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The elution behavior of branched macromolecules during their separation by size exclusion chromatography (SEC) was studied. The elution behavior of branched polymers was investigated using samples of randomly branched polystyrene and star branched poly(benzyl methacrylate) of different levels of branching by means of a SEC chromatograph coupled with a multiangle light scattering detector. Abnormal SEC elution behavior was found to be typical for highly branched polymers. After a normal elution at small elution volumes the molar mass and root mean square radius of the eluting molecules increased with increasing elution volume. Several SEC experiments were carried out to find explanation for this effect and SEC separation was compared with the separation by thermal field flow fractionation. (C) 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 1588-1594, 2001.
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