Branching Analysis of Comb-Shaped Polystyrene with Long Chain Branches
SCIE
SCOPUS
- Title
- Branching Analysis of Comb-Shaped Polystyrene with Long Chain Branches
- Authors
- Lee, S.; Chang, T.
- Date Issued
- 2017-04
- Publisher
- Wiley-VCH Verlag
- Abstract
- Model comb-shaped polystyrene (PS) samples are synthesized by anionic polymerization and the as-prepared PS heterogeneous combs are further fractionated by temperature gradient interaction chromatography (TGIC) to obtain well-defined random combs with 1?4 branches at random positions on a backbone. Size exclusion chromatography-triple detection and TGIC-triple detection analyses are carried out with the fractionated PS random combs in a good and a theta solvent, respectively. The experimentally observed geometric contraction factor (g), the ratio of the mean square radius of gyration and the hydrodynamic contraction factor (g��), and the ratio of the intrinsic viscosity are compared. It is observed that the two contraction factors follow the relationship of g�� = g�� reasonably well and the exponent �� of the PS combs is found as ��1 in a good solvent and ��0.66 in a theta solvent. Furthermore, it is found that the theoretical grw is not in good agreement with the experimental results. (Figure presented.). ? 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
- Keywords
- Anionic polymerization; Chains; Chromatography; Polystyrenes; Solvents; Branching analysis; Contraction factor; Intrinsic viscosity; Long chain branches; Mean-square radius of gyration; Random position; Temperature gradient interaction chromatography; Theta solvent; Size exclusion chromatography
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/50895
- DOI
- 10.1002/macp.201700087
- ISSN
- 1022-1352
- Article Type
- Article
- Citation
- Macromolecular Chemistry and Physics, vol. 218, no. 12, page. 1700087, 2017-04
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