Authors: X. Sha, A. Beyle, C.C. Ibeh
Affilation: Pittsburg State University, United States
Pages: 458 - 460
Keywords: sonication, viscosity, vinyl ester, nanocomposites
This study investigates the influence of sonication on the viscosity and mechanical properties of polymeric nanocomposites. Parameters of study are percentage level of catalyst, temperature level, neat polymer (vinyl ester), nanoparticle [nanoclay] infused polymer (nanocomposite) . NMR and viscometry studies show that ultrasonic mixing results in changes in chemical structure of vinyl ester and epoxy resins of this effort, and significantly affects the nanoparticles dispersion quality and properties of the nanocomposite. Results indicate that there are shifts in mechanical characteristics. Decreases in Young’s modulus and strength are experienced while ultimate strain and energy absorption properties exhibit increases. Data tend to confirm the hypothesis that pseudo-cavitations of the sonication process cause rupture of macromolecules and creation of free radicals which are attached as lateral branches making polymer more grafted and rubber-like.
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