Creation of micropores by RAFT copolymerization of conjugated multi-vinyl cross-linkers

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We report a new methodology that allows for forming micropores in hierarchically porous polymers by employing the reversible addition–fragmentation chain transfer (RAFT) copolymerization of conjugated multi-vinyl cross-linkers with styrene. Using divinylbenzene, 4,4′-divinylbiphenyl, 1,3,5-tris(4-vinylphenyl)benzene and tetrakis(4-vinylbiphenyl)methane as cross-linkers, the RAFT copolymerization was carried out in the presence of polylactide macro-chain transfer agents. During the polymerization, microphase separation occurred spontaneously to produce cross-linked block polymer precursors with a bicontinuous morphology composed of polylactide and cross-linked polystyrene microdomains. Hierarchically porous polymers with strong fluorescence were successfully derived by polylactide etching. We demonstrate that the rigid conjugated structure of the cross-linkers with a high cross-linking density is critical for creating the micropores and for stabilizing the mesopores that are templated by the polylactide domain.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2018-11
Language
English
Article Type
Article
Citation

POLYMER CHEMISTRY, v.9, no.48, pp.5680 - 5689

ISSN
1759-9954
DOI
10.1039/c8py01198b
URI
http://hdl.handle.net/10203/250019
Appears in Collection
NT-Journal Papers(저널논문)
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