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Author Focke, Walter W. ♦ Macheca, Afonso D. ♦ Benhamida, Aida ♦ Kaci, Mustapha
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NANOSCIENCE AND NANOTECHNOLOGY ♦ CARBOXYLIC ACIDS ♦ CONFINEMENT ♦ ELECTRONS ♦ FILLERS ♦ FLEXIBILITY ♦ GLASS ♦ INTERACTIONS ♦ NANOCOMPOSITES ♦ NANOPARTICLES ♦ POLYAMIDES ♦ TRANSITION TEMPERATURE ♦ TRANSMISSION ♦ TRANSMISSION ELECTRON MICROSCOPY
Abstract Dimer fatty acid polyamide nanocomposites based on flake- or needle-shaped nanoparticles were prepared via melt compounding. Transmission electron microscopy showed the presence of both individually dispersed particles and particle agglomerates in the polymer matrix. Dynamic mechanical analysis suggests that three stiffening mechanisms were operating. The reinforcing effect of the high stiffness inorganic filler particles is the primary contributor. Together with the chain confinement effect, that expresses itself in an apparent increase in the glass transition temperature, this provided an adequate rationalization of the stiffness variation below Tg. However, an additional stiffening effect is indicated at temperatures above Tg. The mechanism may involve dynamic network formation based on fluctuating hydrogen bonding interactions between the polymer chains and the filler particles.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-18
Publisher Place United States
Volume Number 1736
Issue Number 1


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