Use of combined chromatographic methods including thin-layer chromatography for analysis of complex polymer systems

Belen'kii, B.G.; Gankina, E.S.; Nefedov, P.P.; Lazareva, M.A.; Savitskaya, T.S.; Volchikhina, M.D.

doi:10.1016/s0021-9673(00)97489-2

Cited by 20 publications

(7 citation statements)

References 22 publications

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“…Detailed characterization of some diblock copolymers that were prepared by sequential anionic polymerization has shown their unexpectedly large compositional heterogeneity. [3][4][5] These results may reflect the presence of parent homopolymers.…”

Section: Introductionmentioning

confidence: 93%

Separation of Parent Homopolymers from Diblock Copolymers by Liquid Chromatography under Limiting Conditions of Desorption, 2 ‐ Optimization of Experimental Arrangement

Berek¹

2008

Macro Chemistry & Physics

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The experimental arrangement for liquid chromatography under limiting conditions of desorption was optimized, aiming at separation of the parent homopolymers from diblock copolymers. Measurements with the block copolymer PS‐b‐PMMA have confirmed that the method enables fast and efficient separation of both parent homopolymers PS and PMMA from the copolymers in a single run. The new experimental set‐up also allows the separation of potentially present low molecular or oligomeric admixtures from the polymeric constituents of sample. The peak broadening of the non‐retained macromolecules has been suppressed. The sample recovery is high and can be easily checked by the injection of a large volume of an appropriate displacer.

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Section: Introductionmentioning

confidence: 93%

Separation of Parent Homopolymers from Diblock Copolymers by Liquid Chromatography under Limiting Conditions of Desorption, 2 ‐ Optimization of Experimental Arrangement

Berek¹

2008

Macro Chemistry & Physics

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“…For decades, size exclusion chromatography (SEC) has been applied for the semiquantitative molecular characterization of block copolymers6, 7 and also for checking the presence of parent homopolymers. The assessment of parent homopolymers in block copolymers by means of SEC is rather difficult.…”

Section: Introductionmentioning

confidence: 99%

“…To determine both the amount and molecular characteristics of homopolymer(s) present in block copolymers the components of the system must be separated. However, the well known limited selectivity of separation and insufficient sample capacity of SEC, together with detection problems, substantially restrict its applicability to this purpose 7, 8…”

Section: Introductionmentioning

confidence: 99%

“…Evidently, interaction retention mechanisms are to be involved to solve the above tasks. Ryu et al,5 Tanaka et al,6 Belenkii et al,7 and Inagaki and Tanaka8 separated block copolymers of styrene and methyl methacrylate using isocratic adsorption liquid chromatography. In this way, Ryu et al5 purified their block copolymers from parent homopolymers on a preparative scale.…”

Section: Introductionmentioning

confidence: 99%

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Separation of Parent Homopolymers from Diblock Copolymers by Liquid Chromatography under Limiting Conditions Desorption, 1 ‐ Principle of the Method

Berek

2008

Macro Chemistry & Physics

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A novel group of liquid chromatographic methods was developed, namely liquid chromatography under limiting conditions of enthalpic interactions (LC LC). LC LC utilizes the difference in the elution rates of the slow, pore permeating small solvent molecules and the fast traveling pore excluded macromolecules. The appropriately chosen small molecules create a barrier, which selectively promotes enthalpic interactions of one kind of polymer chains within the chromatographic system and thus blocks their fast elution. The non‐interacting polymer chains elute rapidly. Two different barriers enable simultaneous separation of both parent homopolymers from a diblock copolymer.magnified image

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“…Analysis of copolymer composition by TLC was also reviewed by Mori [42]. Tri-block copolymers ofMMA-styrene-MMA were characterized by SEC, TLC and PGC [79]. SEC was applied first to fractionate the copolymers according to molecular size.…”

Section: Sec-thin Layer Chromatographymentioning

confidence: 99%

Copolymer analysis

Mori¹

1989

Size Exclusion Chromatography

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Use of combined chromatographic methods including thin-layer chromatography for analysis of complex polymer systems

Cited by 20 publications

References 22 publications

Separation of Parent Homopolymers from Diblock Copolymers by Liquid Chromatography under Limiting Conditions of Desorption, 2 ‐ Optimization of Experimental Arrangement

Separation of Parent Homopolymers from Diblock Copolymers by Liquid Chromatography under Limiting Conditions of Desorption, 2 ‐ Optimization of Experimental Arrangement

Separation of Parent Homopolymers from Diblock Copolymers by Liquid Chromatography under Limiting Conditions Desorption, 1 ‐ Principle of the Method

Copolymer analysis

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