Preparation and characterization of cyclic polystyrenes

Donghyun Cho, Keisuke Masuoka, Kazuhiro Koguchi, Takeshi Asari, Daisuke Kawaguchi, Atsushi Takano, Yushu Matsushita

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Macrocyclic polystyrenes with various molecular weight were prepared by the reaction of linear polystyrene having two end vinyl groups and potassium naphthalenide as a coupling agent. Intermolecular side reactions produced higher molecular weight polycondensates and undesirable chain termination reactions also produced linear precursors in addition to the designed molecules. In order to isolate cyclic polymers from the ring closure reaction mixtures, preparative size exclusion chromatography (SEC) method was employed. The purity of SEC-fractionated cyclic polystyrenes was rigorously examined by liquid chromatography at the critical condition (LCCC) and interaction chromatography (IC). After SEC-fractionation, we obtained large amount of highly pure cyclic polymers, though high molecular weight cyclic polymers contain very small amount of linear precursor (< 5%). The purity and isotope effect on reversed-phase liquid chromatography (RPLC) were also rigorously investigated by preparing a deuterated cyclic polystyrene.

Original languageEnglish
Pages (from-to)506-511
Number of pages6
JournalPolymer Journal
Volume37
Issue number7
DOIs
Publication statusPublished - Sep 15 2005

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Polystyrenes
Size exclusion chromatography
Polymers
Molecular weight
Liquid chromatography
Coupling agents
Fractionation
Chromatography
Isotopes
Potassium
Molecules

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Cho, D., Masuoka, K., Koguchi, K., Asari, T., Kawaguchi, D., Takano, A., & Matsushita, Y. (2005). Preparation and characterization of cyclic polystyrenes. Polymer Journal, 37(7), 506-511. https://doi.org/10.1295/polymj.37.506

Preparation and characterization of cyclic polystyrenes. / Cho, Donghyun; Masuoka, Keisuke; Koguchi, Kazuhiro; Asari, Takeshi; Kawaguchi, Daisuke; Takano, Atsushi; Matsushita, Yushu.

In: Polymer Journal, Vol. 37, No. 7, 15.09.2005, p. 506-511.

Research output: Contribution to journalArticle

Cho, D, Masuoka, K, Koguchi, K, Asari, T, Kawaguchi, D, Takano, A & Matsushita, Y 2005, 'Preparation and characterization of cyclic polystyrenes', Polymer Journal, vol. 37, no. 7, pp. 506-511. https://doi.org/10.1295/polymj.37.506
Cho D, Masuoka K, Koguchi K, Asari T, Kawaguchi D, Takano A et al. Preparation and characterization of cyclic polystyrenes. Polymer Journal. 2005 Sep 15;37(7):506-511. https://doi.org/10.1295/polymj.37.506
Cho, Donghyun ; Masuoka, Keisuke ; Koguchi, Kazuhiro ; Asari, Takeshi ; Kawaguchi, Daisuke ; Takano, Atsushi ; Matsushita, Yushu. / Preparation and characterization of cyclic polystyrenes. In: Polymer Journal. 2005 ; Vol. 37, No. 7. pp. 506-511.
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