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Analysing the Chemical Composition Distribution of Ethylene‐Acrylate Copolymers: Comparison of HT‐HPLC, CRYSTAF and TREF
Author(s) -
Albrecht Andreas,
Brüll Robert,
Macko Tibor,
Sinha Pritish,
Pasch Harald
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800223
Subject(s) - high performance liquid chromatography , copolymer , fractionation , chemistry , chromatography , elution , acrylate , monomer , methyl acrylate , polymer chemistry , polymer , organic chemistry
HT‐HPLC is an attractive technique to analyse CCD of olefin copolymers and offers the possibility to shorten analysis times compared to fractionation techniques based on crystallisation. We have found that HT‐HPLC enables the selective elution of EMA and EBA copolymers according to their content of the polar co‐monomer. This fractionation could be confirmed by coupling the gradient HPLC system with FT‐IR spectroscopy. The CCDs obtained by this new method were then compared to the results from CRYSTAF. Both methods, HT‐HPLC and CRYSTAF, can discriminate between sets of samples having a narrow or a broad CCD. They can also prove the presence of acrylate‐poor fractions.