Figure-Eight-Shaped and Cage-Shaped Cyclic Polystyrenes

Figure-Eight-Shaped and Cage-Shaped Cyclic Polystyrenes

Nonlinear polystyrenes (PS) with similar molecular weights but with different molecular structures having star-, figure-8-, and cage-shaped architectures were synthesized by combining atom transfer radical polymerization (ATRP) and click chemistry. Figure-8- and cage-shaped PS were fractionated by u...

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Veröffentlicht in:Macromolecules 2016-05, Vol.49 (10), p.3672-3680
Hauptverfasser: Lee, Taeheon, Oh, Joongsuk, Jeong, Jonghwa, Jung, Haeji, Huh, June, Chang, Taihyun, Paik, Hyun-jong
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container_end_page 3680
container_issue 10
container_start_page 3672
container_title Macromolecules
container_volume 49
creator Lee, Taeheon
Oh, Joongsuk
Jeong, Jonghwa
Jung, Haeji
Huh, June
Chang, Taihyun
Paik, Hyun-jong
description Nonlinear polystyrenes (PS) with similar molecular weights but with different molecular structures having star-, figure-8-, and cage-shaped architectures were synthesized by combining atom transfer radical polymerization (ATRP) and click chemistry. Figure-8- and cage-shaped PS were fractionated by using a gradient normal phase liquid chromatography as confirmed by SEC-LS, MALDI–TOF MS, 1H NMR, and FT-IR spectrometry. Their purities were estimated by using a two-dimensional liquid chromatography (2D-LC). The glass transition temperatures of these topologically different polymers were in the order of cage-, figure-8-, and star-shaped polymers possibly due to the multiple links that constrain the overall molecular diffusivity in the case of multicyclic polymers (figure-8, and cage). Monte Carlo simulation on the glass transition behavior of model system also agreed well with the experimental results.
doi_str_mv 10.1021/acs.macromol.6b00093
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