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Hierarchically Porous Polymers from Hyper-cross-linked Block Polymer Precursors.

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Title: Hierarchically Porous Polymers from Hyper-cross-linked Block Polymer Precursors.
Authors: Myungeun Seo1 seomyungeun@kaist.ac.kr, Soobin Kim1, Jaehoon Oh1, Sun-Jung Kim2, Hillmyer, Marc A.3
Source: Journal of the American Chemical Society. 1/21/2015, Vol. 137 Issue 2, p600-603. 4p.
Subjects: Porous polymers, Block copolymers, Chain transfer (Chemistry), Addition polymerization, Alkylation, Mesopores
Abstract: We report synthesis of hierarchically porous polymers (HPPs) consisting of micropores and well-defined 3D continuous mesopores by combination of hyper-cross-linking and block polymer self-assembly. Copolymerization of 4-vinylbenzyl chloride (VBzCl) with divinylbenzene (DVB) in the presence of polylactide (PLA) macro-chain-transfer agent produced a cross-linked block polymer precursor PLA-b-P(VBzCl-co-DVB) via reversible addition--fragmentation chain transfer polymerization. A nanoscopic bicontinuous morphology containing PLA and P(VBzCl-co-DVB) microdomains was obtained as a result of polymerization-induced microphase separation. While a basic treatment of the precursor selectively removed PLA to yield a reticulated mesoporous polymer, hyper-cross-linking of the precursor by FeCl3 generated micropores in the P(VBzCl-co-DVB) microdomain via Friedel--Crafts alkylation and simultaneously degraded PLA to produce the HPP containing micropores in the mesoporous framework. The mesopore size of the HPP could be precisely controlled from 6 to 15 nm by controlling the molar mass of PLA. We demonstrate acceleration in adsorption rate in the HPP compared to a hyper-cross-linked microporous polymer. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the American Chemical Society is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 101085160
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Hierarchically Porous Polymers from Hyper-cross-linked Block Polymer Precursors.
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  Data: <searchLink fieldCode="AR" term="%22Myungeun+Seo%22">Myungeun Seo</searchLink><relatesTo>1</relatesTo><i> seomyungeun@kaist.ac.kr</i><br /><searchLink fieldCode="AR" term="%22Soobin+Kim%22">Soobin Kim</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jaehoon+Oh%22">Jaehoon Oh</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sun-Jung+Kim%22">Sun-Jung Kim</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hillmyer%2C+Marc+A%2E%22">Hillmyer, Marc A.</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+American+Chemical+Society%22">Journal of the American Chemical Society</searchLink>. 1/21/2015, Vol. 137 Issue 2, p600-603. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Porous+polymers%22">Porous polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Block+copolymers%22">Block copolymers</searchLink><br /><searchLink fieldCode="DE" term="%22Chain+transfer+%28Chemistry%29%22">Chain transfer (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Addition+polymerization%22">Addition polymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Alkylation%22">Alkylation</searchLink><br /><searchLink fieldCode="DE" term="%22Mesopores%22">Mesopores</searchLink>
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  Label: Abstract
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  Data: We report synthesis of hierarchically porous polymers (HPPs) consisting of micropores and well-defined 3D continuous mesopores by combination of hyper-cross-linking and block polymer self-assembly. Copolymerization of 4-vinylbenzyl chloride (VBzCl) with divinylbenzene (DVB) in the presence of polylactide (PLA) macro-chain-transfer agent produced a cross-linked block polymer precursor PLA-b-P(VBzCl-co-DVB) via reversible addition--fragmentation chain transfer polymerization. A nanoscopic bicontinuous morphology containing PLA and P(VBzCl-co-DVB) microdomains was obtained as a result of polymerization-induced microphase separation. While a basic treatment of the precursor selectively removed PLA to yield a reticulated mesoporous polymer, hyper-cross-linking of the precursor by FeCl3 generated micropores in the P(VBzCl-co-DVB) microdomain via Friedel--Crafts alkylation and simultaneously degraded PLA to produce the HPP containing micropores in the mesoporous framework. The mesopore size of the HPP could be precisely controlled from 6 to 15 nm by controlling the molar mass of PLA. We demonstrate acceleration in adsorption rate in the HPP compared to a hyper-cross-linked microporous polymer. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of the American Chemical Society is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1021/ja511581w
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      – Code: eng
        Text: English
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        PageCount: 4
        StartPage: 600
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        Type: general
      – SubjectFull: Block copolymers
        Type: general
      – SubjectFull: Chain transfer (Chemistry)
        Type: general
      – SubjectFull: Addition polymerization
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      – SubjectFull: Alkylation
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      – SubjectFull: Mesopores
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      – TitleFull: Hierarchically Porous Polymers from Hyper-cross-linked Block Polymer Precursors.
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            NameFull: Myungeun Seo
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            NameFull: Soobin Kim
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            NameFull: Jaehoon Oh
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            NameFull: Sun-Jung Kim
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            NameFull: Hillmyer, Marc A.
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              M: 01
              Text: 1/21/2015
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              Y: 2015
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