Abstract
Cyclic 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). 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%).
| Original language | English |
|---|---|
| Title of host publication | 54th SPSJ Symposium on Macromolecules - Polymer Preprints, Japan |
| Pages | 3553 |
| Number of pages | 1 |
| Volume | 54 |
| Edition | 2 |
| Publication status | Published - 2005 |
| Externally published | Yes |
| Event | 54th SPSJ Symposium on Macromolecules - Yamagata, Japan Duration: Sep 20 2005 → Sep 22 2005 |
Other
| Other | 54th SPSJ Symposium on Macromolecules |
|---|---|
| Country | Japan |
| City | Yamagata |
| Period | 9/20/05 → 9/22/05 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
HPLC analysis of cyclic polystyrenes. / Cho, Donghyun; Kawaguchi, Daisuke; Takano, Atsushi; Matsushita, Yushu.
54th SPSJ Symposium on Macromolecules - Polymer Preprints, Japan. Vol. 54 2. ed. 2005. p. 3553.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - HPLC analysis of cyclic polystyrenes
AU - Cho, Donghyun
AU - Kawaguchi, Daisuke
AU - Takano, Atsushi
AU - Matsushita, Yushu
PY - 2005
Y1 - 2005
N2 - Cyclic 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). 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%).
AB - Cyclic 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). 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%).
UR - http://www.scopus.com/inward/record.url?scp=33645638149&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33645638149&partnerID=8YFLogxK
M3 - Conference contribution
VL - 54
SP - 3553
BT - 54th SPSJ Symposium on Macromolecules - Polymer Preprints, Japan
ER -