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  Molar Mass Fractionation in Aqueous Two-Phase Polymer Solutions of Dextran and Poly(ethylene glycol)

Zhao, Z., Li, Q., Ji, X., Dimova, R., Lipowsky, R., & Liu, Y. (2016). Molar Mass Fractionation in Aqueous Two-Phase Polymer Solutions of Dextran and Poly(ethylene glycol). Journal of Chromatography A, 1452, 107-115. doi:10.1016/j.chroma.2016.04.075.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-5203-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-BDA7-C
Genre: Journal Article

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 Creators:
Zhao, Ziliang, Author
Li, Qi, Author
Ji, Xiangling, Author
Dimova, Rumiana1, Author              
Lipowsky, Reinhard2, Author              
Liu, Yonggang1, Author              
Affiliations:
1Rumiana Dimova, Theorie & Bio-Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863328              
2Reinhard Lipowsky, Theorie & Bio-Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863327              

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Free keywords: Aqueous two-phase system; dextran; poly(ethylene glycol); GPC; fractionation; partition
 Abstract: Dextran and poly(ethylene glycol) (PEG) in phase separated aqueous two-phase systems (ATPSs) of these two polymers, with a broad molar mass distribution for dextran and a narrow molar mass distribution for PEG, were separated and quantified by gel permeation chromatography (GPC). Tie lines constructed by GPC method are in excellent agreement with those established by the previously reported approach based on density measurements of the phases. The fractionation of dextran during phase separation of ATPS leads to the redistribution of dextran of different chain lengths between the two phases. The degree of fractionation for dextran decays exponentially as a function of chain length. The average separation parameters, for both dextran and PEG, show a crossover from mean field behavior to Ising model behavior, as the critical point is approached.

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 Dates: 2016-04-282016-06-24
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1016/j.chroma.2016.04.075
BibTex Citekey: Zhao2016
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Title: Journal of Chromatography A
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 1452 Sequence Number: - Start / End Page: 107 - 115 Identifier: ISSN: 0021-9673