| Download | - View final version: Intrinsic viscosity of cyclic polystyrene (PDF, 789 KB)
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| DOI | Resolve DOI: https://doi.org/10.1021/acs.macromol.7b01511 |
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| Author | Search for: Jeong, Youncheol; Search for: Jin, Ye; Search for: Chang, Taihyun; Search for: Uhlik, Filip; Search for: Roovers, Jacques1 |
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| Name affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Abstract | The intrinsic viscosity of cyclic polystyrenes (C-PS) and linear polystyrenes (L-PS) with molecular weight (MW) ranging from 16K to 370K was measured in THF using size exclusion chromatography coupled with a triple detection system. The C-PS samples were prepared by a ring-closure reaction of telechelic linear precursor synthesized by anionic polymerization. As-synthesized C-PS samples after the ring-closure reaction contain various byproducts, and they were fractionated by liquid chromatography at the critical condition to obtain highly pure C-PS. While the intrinsic viscosity of L-PS agrees well with the literature data, C-PS shows significantly lower value than the literature values. The Mark–Houwink exponent of C-PS is 0.67, somewhat lower than 0.70 for L-PS in the good solvent over the MW range examined. Therefore, the ratio of the intrinsic viscosity of C-PS to L-PS (g′ = [η]C/[η]L) in THF is not MW independent but decreases as MW increases (0.63 ≥ [η]C/[η]L ≥ 0.57). The trend of intrinsic viscosity agrees well with the computer simulation result. The discrepancy in [η]C from the literature values can largely be attributed to the contamination of linear byproducts in the earlier studies. |
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| Publication date | 2017-09-25 |
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| Publisher | American Chemical Society |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23003137 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction |
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| Record identifier | 7cac559f-63d0-4841-a634-495d432db2f3 |
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| Record created | 2018-04-27 |
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| Record modified | 2020-05-30 |
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