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Author

Baek, Jong-Beom
Center for Dimension-Controllable Organic Frameworks
Research Interests
  • Covalent Organic Frameworks (COFs), Carbon Nanotubes(CNTs), graphene, Energy Conversion and Storage

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Nanocomposites derived from in situ grafting of linear and hyperbranched poly(ether-ketone)s containing flexible oxyethylene spacers onto the surface of multiwalled carbon nanotubes

Cited 31 times inthomson ciCited 32 times inthomson ci
Title
Nanocomposites derived from in situ grafting of linear and hyperbranched poly(ether-ketone)s containing flexible oxyethylene spacers onto the surface of multiwalled carbon nanotubes
Author
Jeon, In-YupTan, Loon-SengBaek, Jong-Beom
Keywords
Carbon nanotubes; Electrophilic substitution reaction; Hyperbranched; Nanocomposites; Poly(ether-ketone)s; Polycondensation
Issue Date
200806
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.46, no.11, pp.3471 - 3481
Abstract
Linear and hyperbranched poly(ether-ketone)s (PEKs) containing flexible oxyethylene spacers grafted multiwalled carbon nanotube (PEK-g-MWNT) nanocomposites were prepared by direct Friedel-Crafts acylation as the polymer forming and grafting reaction. To achieve the composites, in situ polycondensations of AB monomers 3-(2-phenoxyethoxy)benzoic acid (3-PEBA) and 4-(2-phenoxyethoxy)benzoic acid (4-PEBA), and AB 2 monomer 3,5-bis(2-phenoxyethoxy)benzoic acid (3,5-BPEBA) were carried out in the presence of multiwalled carbon nanotubes (MWNTs). The reaction conditions, polyphosphoric acid (PPA) with additional phosphorous phentoxide (P 2O 5) in the temperature range of 110-120 °C, were previously optimized. The conditions were used as the polymerization and grafting medium that were indeed benign not to damage MWNTs but strong enough to promote the covalent attachment of PEKs onto the surface of the electron-deficient MWNTs. From scanning electron microscopy (SEM) and transmission electron microscopy studies, the polymers were uniformly grafted onto the MWNTs. The resultant nanocomposites are soluble in most strong acids such as trifluoroacetic acid, methanesulfonic acid, and sulfuric acid. Both isothermal and dynamic TGA studies in air showed that nanocomposites displayed improved thermo-oxidative stability when compared with those of corresponding PEK homopolymers.
URI
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DOI
http://dx.doi.org/10.1002/pola.22649
ISSN
0887-624X
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