Predicting the chromatographic retention of polymers: Application of the polymer model to poly(styrene/ethylacrylate)copolymers

Bashir, Mubasher A.; Radke, Wolfgang

doi:10.1016/j.chroma.2011.12.062

Cited by 18 publications

(6 citation statements)

References 20 publications

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“…Brun et al 18–24 elaborated theoretical simulations and added experimental measurements (with chlorinated PE and other random copolymers), which enable to explain the retention behavior of random copolymers in mixed mobile phases. Additional experiments, which confirmed the hypothesis of Brun et al, were realized by Bashir and Radke 25,26 . According to Brun et al, each random copolymer with a sufficiently high molar mass (>~20 kg/mol) has a critical adsorption point at which it elutes independent of its molar mass.…”

Section: Introductionsupporting

confidence: 73%

“…Additional experiments, which confirmed the hypothesis of Brun et al, were realized by Bashir and Radke. 25,26 According to Brun et al, each random copolymer with a sufficiently high molar mass (>$20 kg/mol) has a critical adsorption point at which it elutes independent of its molar mass. Consequently, random copolymers are separated by the solvent gradient according to their chemical composition and not according to their molar mass.…”

Section: Introductionmentioning

confidence: 99%

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Separation of amorphous and semicrystalline parts of LLDPE with high‐temperature interactive liquid chromatography

Macko

Arndt

Deshmukh

et al. 2023

J of Applied Polymer Sci

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Linear low‐density polyethylene (LLDPE) materials may contain components, which are soluble at room temperature. These may influence physical properties or raise concerns for end‐users and regulatory bodies because LLDPE is widely used for food packaging. Due to the nonpolar and amorphous nature of the room temperature soluble part of LLDPE, its molecular characterization with common methods for polyolefin analysis, such as Temperature Rising Elution Fractionation (TREF), Crystallization Fractionation (CRYSTAF), or Differential Scanning Calorimetry (DSC), has proven to be very challenging. Separation of the amorphous part of LLDPE, as well as its semicrystalline part, is, however, realizable with high‐temperature liquid chromatography (HT‐LC), which is demonstrated for the first time in this work. This technique enables to evaluate the chemical composition distribution of the room‐temperature solubles and non‐solubles in LLDPE samples. It was found that LLDPE synthesized with metallocene catalysts contained only a very small amount of amorphous material. In contrast, LLDPE prepared with Ziegler‐Natta catalysts contained up to 14 wt.% of the amorphous copolymer. The latter was soluble at room temperature, had a weight‐average molar mass ranging from 60 to 200 kg/mol, and contained about 10 mol% more 1‐olefin than the non‐soluble part of LLDPE.

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Section: Introductionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Separation of amorphous and semicrystalline parts of LLDPE with high‐temperature interactive liquid chromatography

Macko

Arndt

Deshmukh

et al. 2023

J of Applied Polymer Sci

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“…36,42–51 The approach requires establishment of chromatographic critical point (CCP) of each block that allows exclusion of the non-critical block. 52–54…”

Section: Resultsmentioning

confidence: 99%

Novel epoxy-terminated macromonomers and their polymerization for synthesis of bottle-brush type amphiphilic block copolymers

Malik

2023

RSC Adv.

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“…The reason for the lack of information on the CCD as compared with the knowledge on the MMD results from the fact that determination of CCD requires separating the individual copolymer chains by their chemical composition. Such separations are usually performed by gradient chromatography, sometimes termed as gradient elution liquid chromatography (GELC) or solvent gradient interaction chromatography (SGIC) . In a typical gradient experiment, the sample is dissolved in a solvent that allows for adsorption of the analyte molecules to the stationary phase, followed by successive desorption of the sample components by application of a solvent gradient of increasing eluotropic strength.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Chemical Composition Distribution of Poly(n‐butyl acrylate‐stat‐acrylic acid)s

Maier

Malz

Radke

2014

Macro Chemistry & Physics

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A size exclusion chromatography (SEC)‐gradient method is developed allowing poly(n‐butyl acrylate‐stat‐acrylic acid)s to be separated with respect to content of acrylic acid over the complete composition range. After setting up the chromatographic method, samples that, according to the amounts of charged monomers, are expected to have identical chemical composition are compared. The chromatograms reveal differences in elution volume, which, by 1H NMR spectroscopy, can be partially traced back to differences in polymer composition. In addition, samples of similar compositions prepared in different solvents exhibit differences in chemical composition distribution.

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Predicting the chromatographic retention of polymers: Application of the polymer model to poly(styrene/ethylacrylate)copolymers

Cited by 18 publications

References 20 publications

Separation of amorphous and semicrystalline parts of LLDPE with high‐temperature interactive liquid chromatography

Separation of amorphous and semicrystalline parts of LLDPE with high‐temperature interactive liquid chromatography

Novel epoxy-terminated macromonomers and their polymerization for synthesis of bottle-brush type amphiphilic block copolymers

Characterization of the Chemical Composition Distribution of Poly(n‐butyl acrylate‐stat‐acrylic acid)s

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