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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 5, Number 4
April 20, 1984 

A Method for Determining Molecular Weights of Block Copolymers by Gel Permeation Chromatography
Jeongin Sohn, Taikyue Ree
A theory is given for determining the molecular weights of block copolymers from the experimental elution volume in GPC. Interaction effect between a sample of block copolymer and a column packing material as well as the size effect are separately considered for the first time applying the partial exclusion mechanism proposed by Dawkins. The molecular weight determination shows 6% standard-deviation from the molecular weights measured by an osmometric method for eight block copolymers, nwhich is much more improved result than other methods, e.g., the universal plot method (13 %) and the Runyon's method (12 %). The reason which explains the better result is that our theory takes into account the interaction effect correctly.
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