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Liquid chromatography under limiting conditions of desorption 6: Separation of a four‐component polymer blend
Author(s) -
Berek Dušan,
Macová Eva
Publication year - 2015
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201400992
Subject(s) - tetrahydrofuran , toluene , polystyrene , polymer , copolymer , dimethylformamide , gel permeation chromatography , column chromatography , desorption , ethylene oxide , methyl methacrylate , polymer chemistry , chemistry , elution , chromatography , materials science , organic chemistry , adsorption , solvent
Baseline separation was achieved of a model four‐component polymer blend of polystyrene‐poly(methyl methacrylate)‐poly(ethylene oxide)‐poly(2‐vinyl pyridine) in a single chromatographic run with help of the unconventional method of liquid chromatography under limiting conditions of desorption. Narrow barriers of liquids were employed, which selectively decelerated elution of particular kinds of macromolecules. Bare silica gel was the column packing, and the eluent was a mixture of dimethylformamide/tetrahydrofuran/toluene 30:50:20 w/w/w. Barrier compositions were neat toluene, B#1, neat tetrahydrofuran, B#2, and dimethylformamide/tetrahydrofuran/toluene 15:55:30, B#3. Minor blend constituents (∼1%) could be identified, as well. The result represents a step toward the separation and molecular characterization of triblock‐copolymers, many of which are expected to contain besides both parent homopolymers also the diblock chains and thus they are in fact four‐component polymer blends.