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International Journal of Polymer Science
Volume 2015, Article ID 542376, 10 pages
Research Article

Improvement of Interfacial Shear Strength of Mendong Fiber (Fimbristylis globulosa) Reinforced Epoxy Composite Using the AC Electric Fields

1Mechanical Engineering Department, State University of Malang, Jalan Semarang 5, Malang, East Java 65145, Indonesia
2Mechanical Engineering Department, National Institute of Technology, Jalan Sigura-Gura, Malang, East Java 65145, Indonesia
3Mechanical Engineering Department, University of Brawijaya, Jalan Veteran, Malang, East Java 65145, Indonesia

Received 6 February 2015; Revised 23 April 2015; Accepted 14 May 2015

Academic Editor: Adriana Gregorova

Copyright © 2015 Heru Suryanto et al. 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.


The effects of the AC electric field treatment on the interfacial shear strength of mendong fiber-reinforced epoxy composites were investigated. For this purpose, the epoxy (DGEBA) with a cycloaliphatic amine curing agent was treated by the AC electric field during the curing process. The heat generated during the epoxy polymerization process was monitored. Structure of the epoxy was studied by X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), and Scanning Electron Microscope, respectively. The interfacial shear strength (IFSS) was also measured using a single fiber pull-out test. XRD analyzes indicated that the treatment of AC electric fields was able to form a crystalline phase of epoxy. IFSS of the mendong fiber-reinforced epoxy composites was optimum increased by 38% in the AC electric fields treatment of 750 V/cm.