Size exclusion chromatography, SEC, cannot discriminate macromolecules of distinct dimensions in solution. Moreover, minor blend constituents cannot be well assessed because of low both sample capacity and detector sensitivity of SEC. Liquid chromatography under limiting conditions of enthalpic interactions, LC LC is a novel approach, which employs the �barrier� effect of appropriate low molecular substances that promote enthalpic interactions of macromolecules within chromatographic column. The pore permeating, slowly eluting barrier is situated in front of sample. It decelerates elution of interacting macromolecules without affecting non-interactive macromolecules. The resulting molar mass independent separation is highly selective. Even minor macromolecular constituents of sample can be identified. The fractions eluted from the LC LC column can be in their entirety forwarded to an online SEC column for assessment of molar masses. Principle and selected applications of LC LC will be presented including one-step discrimination of parent homopolymers from block copolymers.The support of Slovak Grant Agencies VEGA (Project 2/0001/12) and APVV (Project 0109/10) is acknowledged. Typical LC LCD separation of a diblock copolymer containing both parent homopolymers

Liquid chromatography of multicomponent polymer systems

247th National Meeting (2014)

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