Polyacrylonitrile‑b‑poly(butyl acrylate) Block Copolymers as Precursors to Mesoporous Nitrogen-Doped Carbons: Synthesis and Nanostructure

A series of polyacrylonitrile-block-poly(butyl acrylate) (PAN-b-PBA) copolymers were prepared by supplemental activator reducing agent atom transfer radical polymerization (SARA ATRP). These copolymers were then used as precursors to pyrolytic nanostructured carbons with the PAN block serving as a...

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Published in	Macromolecules Vol. 50; no. 7; pp. 2759 - 2767
Main Authors	Kopeć, Maciej, Yuan, Rui, Gottlieb, Eric, Abreu, Carlos M. R, Song, Yang, Wang, Zongyu, Coelho, Jorge F. J, Matyjaszewski, Krzysztof, Kowalewski, Tomasz
Format	Journal Article
Language	English
Published	American Chemical Society 11.04.2017
Subjects	carbon composite polymers crystal structure molecular weight nanomaterials polyacrylonitrile polymerization porous media reducing agents small-angle X-ray scattering
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Abstract	A series of polyacrylonitrile-block-poly(butyl acrylate) (PAN-b-PBA) copolymers were prepared by supplemental activator reducing agent atom transfer radical polymerization (SARA ATRP). These copolymers were then used as precursors to pyrolytic nanostructured carbons with the PAN block serving as a nitrogen-rich carbon precursors and the PBA block acting as a sacrificial porogen. The study revealed that while the size of mesopores can be controlled by the size of the porogenic block, the connectivity of pores diminishes with the decrease of the overall molecular weight of the precursor. This partial loss of mesopore connectivity was attributed to the weaker phase segregation between the blocks of shorter lengths inferred from the shape of small-angle X-ray scattering profiles and from the crystallinity of polyacrylonitrile phase.
AbstractList	A series of polyacrylonitrile-block-poly(butyl acrylate) (PAN-b-PBA) copolymers were prepared by supplemental activator reducing agent atom transfer radical polymerization (SARA ATRP). These copolymers were then used as precursors to pyrolytic nanostructured carbons with the PAN block serving as a nitrogen-rich carbon precursors and the PBA block acting as a sacrificial porogen. The study revealed that while the size of mesopores can be controlled by the size of the porogenic block, the connectivity of pores diminishes with the decrease of the overall molecular weight of the precursor. This partial loss of mesopore connectivity was attributed to the weaker phase segregation between the blocks of shorter lengths inferred from the shape of small-angle X-ray scattering profiles and from the crystallinity of polyacrylonitrile phase. A series of polyacrylonitrile-block-poly(butyl acrylate) (PAN-b-PBA) copolymers were prepared by supplemental activator reducing agent atom transfer radical polymerization (SARA ATRP). These copolymers were then used as precursors to pyrolytic nanostructured carbons with the PAN block serving as a nitrogen-rich carbon precursors and the PBA block acting as a sacrificial porogen. The study revealed that while the size of mesopores can be controlled by the size of the porogenic block, the connectivity of pores diminishes with the decrease of the overall molecular weight of the precursor. This partial loss of mesopore connectivity was attributed to the weaker phase segregation between the blocks of shorter lengths inferred from the shape of small-angle X-ray scattering profiles and from the crystallinity of polyacrylonitrile phase.
Author	Kopeć, Maciej Matyjaszewski, Krzysztof Coelho, Jorge F. J Kowalewski, Tomasz Yuan, Rui Song, Yang Wang, Zongyu Abreu, Carlos M. R Gottlieb, Eric
AuthorAffiliation	University of Coimbra CEMMPRE, Department of Chemical Engineering Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology Department of Chemistry, Center for Macromolecular Engineering
AuthorAffiliation_xml	– name: University of Coimbra – name: Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology – name: CEMMPRE, Department of Chemical Engineering – name: Department of Chemistry, Center for Macromolecular Engineering
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Snippet	A series of polyacrylonitrile-block-poly(butyl acrylate) (PAN-b-PBA) copolymers were prepared by supplemental activator reducing agent atom transfer radical... A series of polyacrylonitrile-block-poly(butyl acrylate) (PAN-b-PBA) copolymers were prepared by supplemental activator reducing agent atom transfer radical...
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SubjectTerms	carbon composite polymers crystal structure molecular weight nanomaterials polyacrylonitrile polymerization porous media reducing agents small-angle X-ray scattering
Title	Polyacrylonitrile‑b‑poly(butyl acrylate) Block Copolymers as Precursors to Mesoporous Nitrogen-Doped Carbons: Synthesis and Nanostructure
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