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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 24, 2009
Accepted January 17, 2010

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ultrasound assisted batch-processing of EVA-organoclay nanocomposites

Youngjoon Ahn Hyungsik Kim¹ Jae Wook Lee^†

Department of Chemical and Biomolecular Engineering, Sogang University, Sinsoo-dong, Mapo-gu, Seoul 121-742, Korea ¹Samsung C&T Corporation, 310, Taepyeong-Ro 1 Ga, Jung-gu, Seoul, Korea

jwlee@sogang.ac.kr

Korean Journal of Chemical Engineering, February 2010, 27(2), 723-728(6), 10.1007/s11814-010-0163-1

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Abstract

The aim of this study was to investigate the effect of ultrasound on the properties of a poly[ethylene-co-(vinyl acetate)] (EVA)-organoclay nanocomposite. By using a torque rheometer, in-situ rheological behaviors of various EVA resins with varying VA content were examined. It was found that the effect of ultrasound was most significant for EVA 31 (31 wt% VA). EVA31/organoclay nanocomposites were prepared in batch mixer with and without irradiation_x000D_ of ultrasound. The characterization of the nanocomposite was performed using XRD, TEM, rheometry, and universal testing machine. XRD and TEM results revealed that the produced EVA31/organoclay nanocomposite with ultrasonic irradiation possessed intercalated structure. Rheometry result indicated that EVA31/organoclay nanocomposite processed with ultrasound had a highly disordered or delaminated structure. A considerable increase in stiffness and Young’s modulus for the sonicated nanocomposite compared to those for unsonicated one was obtained. This study demonstrated the possibility of producing EVA-organoclay nanocomposites with enhanced dispersion of nanoclays using ultrasound assisted processing.

Keywords

EVA Ultrasound Melt Intercalation Nanocomposite Dispersion

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