Cross-Fractionation Chromatography (CFC) (3)
Determination of Crystallinity/Molecular Weight 2-Dimensional Distribution of Blends Containing Thermoplastic Elastomer

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Summary

Thermoplastic elastomer contains a large amount of components showing a low crystallinity. For this reason, it has been one of the materials to which it is difficult to apply the temperature rising elution fractionation method (TREF method) or cross-fractionation chromatography (CFC).
It has recently become possible to evaluate the crystallinity distribution in the minus temperature regions by expanding the lower limit of the measurement temperature for cross-fractionation chromatography (CFC) down to -20℃.

Example of determination

Sample: Blend of thermoplastic elastomer and linear low-density polyethylene (LLDPE)

Contour line image

Results of cross-fracionation chromatography (CFC) analysis clearly reveal that as viewed in terms of weight-average molecular weight, the components of thermoplastic elastomer are lower in molecular weight than the ones of linear low-density polyethylene (LLDPE).

Search Number 1031

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