Diode-array detection with spectral suppression in size exclusion and adsorption chromatography for rapid evaluation of chemical composition in block copolymers of styrene and methyl methacrylate

Zimina, Tatiana M.; Fell, Anthony F.; Castledine, J.B.

doi:10.1016/0032-3861(92)90616-5

Cited by 18 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other authors [9][10][11][12][13][14][15][16][17][18][19][20][21] have shown that chromatography under critical conditions is also applicable to block-copolymers. The interaction energies of chemically different blocks will mostly differ significantly.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Especially when chromatography under critical conditions is combined with size-exclusion chromatography (SEC), information about the distribution of endgroups in relation to the molecular-mass distribution can be obtained [2][3][4][5][6][7][8]. It has also been shown that under critical conditions, block-copolymers can be characterized with respect to their block length-distribution [9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Critical retention behaviour of polymers a study on the influence of some practical parameters

Philipsen¹,

Klumperman

Herk

et al. 1996

Journal of Chromatography A

View full text Add to dashboard Cite

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Critical retention behaviour of polymers a study on the influence of some practical parameters

Philipsen¹,

Klumperman

Herk

et al. 1996

Journal of Chromatography A

View full text Add to dashboard Cite

“…As a result, the molar mass of the SEC eluted blocks can be determined as if the ''critically'' eluted blocks were not present. [8][9][10][11] It seems however that this approach suffers from some limitations. [12,13] Still, LC CC can efficiently separate the parent homopolymer eluted under critical conditions, for example poly(X) from the diblock copolymer of the poly(X)-block-poly(Y) type.…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

“…This ingenious idea was for the first time in practice employed by Zimina et al. and afterward by numerous other authors . Later, some uncertainty was expressed concerning straightforward universal applicability of LC CC for molecular characterization of complex polymers including determination of molar mass average and dispersity of the noninteractive blocks in diblock copolymers , however they mostly remained overlooked.…”

Section: Coupled Lc Methodsmentioning

confidence: 99%

Critical assessment of “critical” liquid chromatography of block copolymers

Berek

2016

J of Separation Science

View full text Add to dashboard Cite

Brief elucidation is presented of potential difficulties the researcher can face in the course of the molecular characterization of block copolymers with help of liquid chromatography under critical conditions. The impediments include the demanding identification of critical conditions, the limited area of applicable polymer molar mass, the high sensitivity of critical conditions toward minute changes in experimental conditions including changes in the interactivity of the column packing, extensive band broadening, limited sample recovery, pressure effects, detection problems, coelution of block copolymers with their noninteractive parent homopolymers, possible effect of the noninteracting chains of block copolymers on the behavior of the interacting blocks, and role of preferential solvation of macromolecules in mixed solvents. These matters may complicate proper data evaluation and challenge the exactness of results obtained. Special attention is paid to the so far neglected phenomena of preferential solvation, which may affect not only detection of block copolymers but also their retention. The latter occurrence is demonstrated by the behavior of both poly(methyl methacrylate)s eluted from bare silica gel in a mixed eluent tetrahydrofuran plus toluene and polystyrenes eluted from silica gel C18 bonded phase with the mobile phase of tetrahydrofuran/n-hexane.

show abstract

Diode-array detection with spectral suppression in size exclusion and adsorption chromatography for rapid evaluation of chemical composition in block copolymers of styrene and methyl methacrylate

Cited by 18 publications

References 11 publications

Critical retention behaviour of polymers a study on the influence of some practical parameters

Critical retention behaviour of polymers a study on the influence of some practical parameters

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

Critical assessment of “critical” liquid chromatography of block copolymers

Contact Info

Product

Resources

About