Functionalization of carbon nanotubes and carbon nanofibers used in epoxy/amine matrices that avoid partittioning of the monomers at the fiber interface.(Report): ... from: Polymer Engineering and Science Review
Functionalization of carbon nanotubes and carbon nanofibers used in epoxy/amine matrices that avoid partittioning of the monomers at the fiber interface.(Report): ... from: Polymer Engineering and Science Feature
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on January 1, 2010. The length of the article is 4628 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: Single-wall carbon nanotubes (SWCNT), multiwall carbon nanotubes (MWCNT), and carbon nanofibers (CNF) were oxidized with a conventional [H.sub.2][SO.sub.4]/[HNO.sub.3] treatment, and the resulting COOH groups were esterified with phenyl glycidyl ether (PGE). Pristine, oxidized and esterified SWCNT, MWCNT, and CNF (1 wt%) were dispersed in diglycidyl ether of bisphenol A/polyether tria-mine, and cured to produce epoxy nanocomposite. The quality of the dispersion varied with surface modification in the order: COOH > unmodified > PGE, as assessed for SWCNT/epoxy composites using radial breathing modes in Raman spectra and scanning electron microscopy. Local bundling of PGE-modified nanofillers was explained by a polymerization-induced phase-separation process. Dynamic mechanical analysis showed the presence of two relaxation peaks in nanocomposites prepared with unmodified and COOH-modified SWCNT, MWCNT, and CNF, assigned to a partitioning of monomers at the carbon interface. This produced a significant decrease of the glass transition temperature. However, the esterification with PGE led to a single relaxation peak close to the one of the neat epoxy, for the three types of nanofillers without any penalty in the glassy and rubbery elastic moduli. The effect was explained by matrix exclusion from phase-separated domains. POLYM. ENG. SCI., 50:183-190, 2010. [C] 2009 Society of Plastics Engineers
Citation Details
Title: Functionalization of carbon nanotubes and carbon nanofibers used in epoxy/amine matrices that avoid partittioning of the monomers at the fiber interface.(Report)
Author: Maria L. Auad
Publication: Polymer Engineering and Science (Magazine/Journal)
Date: January 1, 2010
Publisher: Society of Plastics Engineers, Inc.
Volume: 50 Issue: 1 Page: 183(8)
Article Type: Report
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