TY - JOUR
T1 - Figure-Eight-Shaped and Cage-Shaped Cyclic Polystyrenes
AU - Lee, Taeheon
AU - Oh, Joongsuk
AU - Jeong, Jonghwa
AU - Jung, Haeji
AU - Huh, June
AU - Chang, Taihyun
AU - Paik, Hyun Jong
N1 - Funding Information:
This work was supported by the Active Polymer Center for Pattern Integration (No. R11-2007-0056091) and Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2013R1A2A2A01068818). T.C. acknowledges the support from NRF-Korea (2015R1A2A2A01004974). J.H. acknowledges support from NRF-Korea (2013R1A1A2064112).
PY - 2016/5/24
Y1 - 2016/5/24
N2 - 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.
AB - 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.
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U2 - 10.1021/acs.macromol.6b00093
DO - 10.1021/acs.macromol.6b00093
M3 - Article
AN - SCOPUS:84971298817
VL - 49
SP - 3672
EP - 3680
JO - Macromolecules
JF - Macromolecules
SN - 0024-9297
IS - 10
ER -