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Stereospecific Cyclic Poly(methyl methacrylate) and Its Topology‐Guided Hierarchically Controlled Supramolecular Assemblies
Author(s) -
Ren Jing Ming,
Satoh Kotaro,
Goh Tor Kit,
Blencowe Anton,
Nagai Kanji,
Ishitake Kenji,
Christofferson Andrew Joseph,
Yiapanis George,
Yarovsky Irene,
Kamigaito Masami,
Qiao Greg Guanghua
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201308366
Subject(s) - tacticity , stereospecificity , supramolecular chemistry , methyl methacrylate , materials science , methacrylate , topology (electrical circuits) , poly(methyl methacrylate) , polymer , polymer chemistry , crystal structure , crystallography , composite material , chemistry , polymerization , organic chemistry , catalysis , mathematics , combinatorics
In this study, the stereocomplexation between a novel stereospecific cyclic vinyl polymer, that is, cyclic syndiotactic poly(methyl methacrylate) ( st ‐PMMA), with the complementary linear isotactic ( it ‐) PMMA was investigated. Surprising new insight into the effects of the topology (i.e., end groups), size, and tacticity of the assembling components on stereocomplex formation was obtained. Characterization of the stereocomplexes revealed that the self‐assembly of cyclic st ‐PMMAs and linear it ‐PMMAs resulted in the formation of an unprecedented “polypseudorotaxane‐type” supramolecular assembly. This stereocomplex exhibited remarkably different physical properties as compared to the conventional PMMA triple‐helix stereocomplex as a result of the restricted topology imposed by the cyclic st ‐PMMA assembling component.