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Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

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Characterization of a 4-miktoarm star copolymer of the (PS- b -PI) 3 PS type by temperature gradient interaction chromatography

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Title
Characterization of a 4-miktoarm star copolymer of the (PS- b -PI) 3 PS type by temperature gradient interaction chromatography
Author
Cho, DPark, SoojinChang, TAvgeropoulos, AHadjichristidis, N
Keywords
4-Miktoarm star copolymer; Multiple detection; Temperature gradient interaction chromatography
Issue Date
2003-11
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
EUROPEAN POLYMER JOURNAL, v.39, no.11, pp.2155 - 2160
Abstract
Temperature gradient interaction chromatography (TGIC) was applied for the separation of a complex miktoarm star copolymer which has one polystyrene (PS) arm and three polystyrene-b-polyisoprene (PS-b-PI) diblock copolymer arms. Such miktoarm star polymers are much more difficult to characterize than branched homopolymers since the byproduct, typically polymers with missing arm(s) or coupled products, have not only different molecular weights but also different compositions. TGIC was able to fully separate the byproducts, and the composition of the molecular species corresponding to the different separated elution peaks was determined by two methods, fractionation/NMR and multiple detection (UV and RI). A reasonable agreement between the results of the two methods was obtained. By using the composition found, the corresponding molecular weights were determined by multi-angle light scattering detection. Based on the composition and the molecular weight we were able to identify the structure of the different molecular species.
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DOI
10.1016/S0014-3057(03)00154-X
ISSN
0014-3057
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ECHE_Journal Papers
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