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A Method for Determining Molecular Weights of Block Copolymers by Gel Permeation Chromatography

  • Sohn, Jeong-In (Department of Chemistry, Hallym College) ;
  • Ree, Tai-Kyue (Department of Chemistry, Korea Advanced Institute of Science and Technology)
  • 발행 : 1984.08.20

초록

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, which 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.

키워드

참고문헌

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피인용 문헌

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