Control of porosity in hierarchically porous polymers derived from hyper-crosslinked block polymer precursors

Cited 10 time in webofscience Cited 0 time in scopus
  • Hit : 192
  • Download : 0
We report an approach to control the pore characteristics of hierarchically porous polymers (HPPs) containing micropores in a well-defined 3D continuous mesoporous framework, by the hyper-crosslinking reaction of a crosslinked block polymer precursor polylactide-b-poly(vinylbenzyl chloride-co-styrene-co-divinylbenzene) (PLA-b-P(VBzCl-co-S-co-DVB)) consisting of bicontinuous PLA and P(VBzCl-co-S-co-DVB) microdomains. We investigated the hyper-crosslinking reaction of P(VBzCl-co-S-co-DVB)s synthesized by reversible addition-fragmentation chain transfer (RAFT) copolymerization, and then examined the effect of VBzCl, S, DVB, and polylactide macrochain transfer agent (PLA-CTA) contents in the polymerization mixture on the pore characteristics of the HPPs. We demonstrate that while the VBzCl content responsible for the hyper-crosslinking reaction primarily governs microporosity, the DVB content has a strong influence on the mesopore structure, as it determines the onset of the gelation of the polymerization mixture, which arrests the emerging disordered bicontinuous morphology induced by the polymerization-induced microphase separation process. Because the PLA microdomains template the percolating mesoporous space, mesoporosity was mainly controlled by the PLA-CTA contents. The synergistic combination of hyper-crosslinking and block polymer self-assembly in the HPP formation provided a highly reinforced mesoporous framework, stable against pore collapse, and interconnected mesopores. These facilitated diffusion to the microporous surfaces, suggesting its utility for advanced absorbents and catalytic supports. (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 900-913
Publisher
WILEY-BLACKWELL
Issue Date
2018-04
Language
English
Article Type
Article
Keywords

INDUCED MICROPHASE SEPARATION; PORE-SIZE DISTRIBUTION; LARGE SURFACE-AREA; MICROPOROUS ORGANIC POLYMERS; SELF-ASSEMBLY STRATEGY; NANOPOROUS POLYMERS; SMALL MOLECULES; HYPERCROSSLINKED RESINS; EFFICIENT SEPARATION; HYDROGEN STORAGE

Citation

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.56, no.8, pp.900 - 913

ISSN
0887-624X
DOI
10.1002/pola.28966
URI
http://hdl.handle.net/10203/241088
Appears in Collection
NT-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 10 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0