Two‐Dimensional Chromatography of Complex Polymers, 7 – Detailed Study of Polystyrene‐<i>block</i>‐Polyisoprene Diblock Copolymers Prepared by Sequential Anionic Polymerization and Coupling Chemistry

Mass, Valentina; Bellas, Vasilios; Pasch, Harald

doi:10.1002/macp.200800255

Cited by 32 publications

(15 citation statements)

References 40 publications

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“…Two-dimensional liquid chromatography (2D-LC) has been shown to be an extremely useful tool for the investigation of the molecular heterogeneity of complex polymers [173][174][175][176]. Until recently the application of 2D-LC was limited to ambient temperature and it was only in 2010 that the introduction of high-temperature 2D-LC was announced.…”

Section: Two-dimensional Liquid Chromatographymentioning

confidence: 99%

Recent Advances in High-Temperature Fractionation of Polyolefins

Pasch

Malik

Macko³

2012

Advances in Polymer Science

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Section: Two-dimensional Liquid Chromatographymentioning

confidence: 99%

Recent Advances in High-Temperature Fractionation of Polyolefins

Pasch

Malik

Macko³

2012

Advances in Polymer Science

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“…This procedure was first applied by Balke in 1982 [94] and was later elaborated by Pasch [48,95,96], Kilz [97,98] and others [99][100][101][102][103]. For polymers soluble at room or elevated temperatures, many examples of 2-D LC separation exist.…”

Section: -D Lc For Polyolefinsmentioning

confidence: 99%

“…Coupling of two different chromatographic systems enables to resolve multiple distinctive components 93. This procedure was first applied by Balke in 1982 94 and was later elaborated by Pasch 48, 95, 96, Kilz 97, 98 and others 99–103. For polymers soluble at room or elevated temperatures, many examples of 2‐D LC separation exist.…”

Section: Molecular Characterization Of Polyolefinsmentioning

confidence: 99%

A review on the development of liquid chromatography systems for polyolefins

Macko¹,

Brüll²,

Zhu

et al. 2010

J of Separation Science

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Polyolefins are the most widely produced synthetic polymer commodity and are found in countless applications ranging from bottles, packaging films to bullet-proof jackets, etc. Such widely different applications rely on high variability in the physical properties of polyolefins, which is a result of variations in microstructure, chemical composition and molar mass. Though polyolefins contain only carbon (C) and hydrogen (H) atoms, the microstructures of polyolefins are extremely variable, differing in the nature of the monomers (e.g. ethylene versus propylene), the degree of branching, chemical composition in the case of copolymers and finally their molar masses. Production, research and development of polyolefins require the analysis of polyolefin samples in terms of all these parameters. Development of efficient and robust analytical techniques based on the interactive LC is reviewed. The needed computational/theoretical studies to understand the retention mechanism in the newly developed chromatography systems are discussed.

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“…Mass et al published an article on the detailed characterization of PS‐ b ‐PI copolymers synthesized by sequential living anionic polymerization and coupling of living precursor blocks. These copolymers were characterized by liquid chromatography at critical conditions and two‐dimensional liquid chromatography .…”

Section: Introductionmentioning

confidence: 99%

Analysis of polystyrene‐b‐polyisoprene copolymers by coupling of liquid chromatography at critical conditions to NMR at critical conditions of polystyrene and polyisoprene

Sinha

Hiller

Bellas

et al. 2012

J of Separation Science

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For the investigation of the molecular heterogeneity of polystyrene-b-polyisoprene block copolymers, a chromatographic separation method, namely liquid chromatography at critical conditions was developed. This method was coupled on-line with (1)H-NMR(where NMR stands for nuclear magnetic resonance) for the comprehensive analysis of the polystyrene-b-polyisoprene copolymers. The copolymers were synthesized by two different methods: sequential living anionic polymerization and coupling of living precursor blocks. While (1)H-NMR allows just for the analysis of the bulk chemical composition of the block copolymers, the coupling with liquid chromatography at critical conditions provides selective molar mass information on the polystyrene and polyisoprene blocks within the copolymers. The polyisoprene block molar mass is determined by operating at chromatographic conditions corresponding to the critical point of adsorption of polystyrene and size exclusion chromatography mode for polyisoprene. The molar mass of the polystyrene block is determined by operating at the critical conditions of polyisoprene. In addition to the molar mass of each block of the copolymers, the chemical composition distribution of the block copolymers was determined. By using the coupling of liquid chromatography at critical conditions to (1)H-NMR, one can also detect the homopolymers formed during synthesis. Finally the microstructure of the polyisoprene block in the copolymers was evaluated as a function of molar mass.

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Two‐Dimensional Chromatography of Complex Polymers, 7 – Detailed Study of Polystyrene‐block‐Polyisoprene Diblock Copolymers Prepared by Sequential Anionic Polymerization and Coupling Chemistry

Cited by 32 publications

References 40 publications

Recent Advances in High-Temperature Fractionation of Polyolefins

Recent Advances in High-Temperature Fractionation of Polyolefins

A review on the development of liquid chromatography systems for polyolefins

Analysis of polystyrene‐b‐polyisoprene copolymers by coupling of liquid chromatography at critical conditions to NMR at critical conditions of polystyrene and polyisoprene

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