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International Journal of Polymer Science
Volume 2016 (2016), Article ID 4269039, 9 pages
http://dx.doi.org/10.1155/2016/4269039
Research Article

Effect of Elastomeric Nanoparticles on Polystyrene/Organic Nanocomposites

School of Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, 801 Ferst Dr. NW, MRDC 1, Atlanta, GA 30332-0295, USA

Received 4 July 2016; Accepted 31 August 2016

Academic Editor: Ehsan Bafekrpour

Copyright © 2016 Sungwon Ma and Yonathan Thio. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The rheological behavior of nanosheet composites and the effect of morphology between elastomeric nanofiber and nanosheet composites were studied using a Cross-Williamson model and critical volume concentration was investigated by percolation threshold theory for fiber and sheet morphologies. Nanofiber and nanosheet particles were synthesized by a cold vulcanization process using a S2Cl2 cross-linking reagent resulting from self-assembly of a PS-PI block copolymer. Nanofiber and nanosheet characterization was done by SEM. Rheological properties were measured and analyzed in terms of varying nanofiller and nanosheet loading from 0.5 to 10 wt%. For the nanofiber and nanosheet composites, the moduli were increased with increasing filler loading, whereas moduli of SI23 and SI43 composite decreased with increasing content. Both nanofiber and nanosheet composites showed a nanosized filler effect and their structural changes were between 5 and 10 wt%. Cross-Williamson three-parameter model was used to find zero-shear viscosity and relaxation time. Percolation threshold theory was used to study structural changes and calculate values.