Large-Scale Production of PMMA/SWCNT Composites Based on SWCNT Modified with PMMA

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DOIResolve DOI: http://doi.org/10.1021/am201824k
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TypeArticle
Journal titleACS Applied Materials & Interfaces
ISSN1944-8244
1944-8252
Volume4
Issue4
Pages19901997; # of pages: 8
Subjectsingle-walled carbon nanotubes (SWCNT); polymethyl methacrylate (PMMA); covalent functionalization; dispersion
AbstractIn this work, a two-step method consisting of in situ polymerization of polymethyl methacrylate (PMMA) in the presence of single-walled carbon nanotubes (SWCNT), followed by the redispersion of the resulting compound in dimethylformamide (DMF), was used to fabricate SWCNT modified with PMMA (SWCNT–PMMA). Raman spectroscopy revealed that PMMA was merely wrapped around the SWCNT when raw SWCNT or purified SWCNT were used as the starting material. However, PMMA was covalently bonded to SWCNT when acid treated SWCNT (SWCNT-COOH) was used as the starting material. SWCNT–PMMA compounds were further diluted in pure PMMA by conventional melt compounding at large scale (several kilograms) to obtain transparent composites containing 0.09 wt % SWCNT. The micro- and nano-dispersion of the SWCNT in the composites were analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The thermal and mechanical properties of the composites were determined by thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), tensile testing, and Charpy impact testing. At the the low SWCNT loading studied, the tensile properties remain unchanged, whereas the impact strength improves by 20%.
Publication date
LanguageEnglish
AffiliationNRC Steacie Institute for Molecular Sciences; NRC Industrial Materials Institute; NRC Institute for Aerospace Research; National Research Council Canada
Peer reviewedYes
NPARC number21268859
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Record identifiereace6c8a-b940-4823-9e79-88b35717cdde
Record created2013-11-15
Record modified2016-05-09
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