A GPC method to determine the amount of comonomer in an ethylene-norbornene-copolymer

C. Bergström*, J. Ruotoistenmäki, J. Seppälä

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    10 Citations (Scopus)


    The overall composition of an ethylene-norbornene-copolymer can be determined by measuring the GPC-peak area, normalizing it according to sample weight and using a calibration curve established on the basis of 13C-NMR measurements. The normalized GPC-peak area decreases with increasing norbornene content up to 29-30 mol% when it disappears. At higher norbornene contents the polarity of the signal changes but the correlation with norbornene content is still valid. This phenomenon is due to refractive index changes caused by the comonomer. GPC is therefore a very practical tool for characterizing COC which has recently appeared on the market.

    Original languageEnglish
    Pages (from-to)43-48
    Number of pages6
    JournalPolymer Testing
    Issue number1
    Publication statusPublished - Feb 1997
    MoE publication typeA1 Journal article-refereed


    • comonomer content
    • ethylene-norbornene copolymer
    • GPC

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