Effect of Magnetic Field on the Fiber Orientation during the Filling Process in Injection Molding, Part 2: Experiments and Electrical Conductivity Measurements

Abstract:

Conductive polymer composite material has been widely used in many industrial fields. Regarding fibrillar composite material, since the fiber’s orientation and distribution affect the properties of product, how the orientation and distribution are controlled is an important key to improve its properties. In this study, the external magnetic field was applied to injection molding for controlling the orientated behavior of magnetic fiber during the filling process. In addition, the fiber orientation and through-plane conductivity was investigated by means of different injection speeds with or without external magnetic field. The influence of magnetic field on the orientation of fiber was observed using the scanning electron microscope. Results from this paper are expected to provide the important references for future study of conductive polymer composite material by using magnetic-assisted injection molding.

• Periodical: Materials Science Forum (Volume 936)
• Pages: 136-141
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.936.136
• Online since: October 2018
• Authors: Shia Chung Chen, Chen Yuan Chung, Ya Lin Tseng
• Keywords: Conductive Polymer Composite Material, Magnetic-Assisted Injection Molding, Through-Plane Conductivity

References

[1] S. Geetha, K.K. Satheesh Kumar, Chepuri R.K. Rao, M. Vijayan, and D.C. Trivedi, EMI shielding: methods and materials—a review. Journal of Applied Polymer Science, Vol. 112 (2009), p.2073-(2086).

DOI: 10.1002/app.29812

[2] A. Saleem, L. Frormann, and A. Iqba, Mechanical, thermal and electrical resisitivity properties of thermoplastic composites filled with carbon fibers and carbon particles. Journal of Polymer Research, Vol. 14 (2007), pp.121-127.

DOI: 10.1007/s10965-006-9091-5

[3] G. Lu, X. Li, and H. Jiang, Electrical and shielding properties of ABS resin filled with nickel-coated carbon fibers. Composites Science and Technology, Vol. 56 (1996), pp.193-200.

DOI: 10.1016/0266-3538(95)00143-3

[4] M.S. Al-Haik, H. Garmestani, D.S. Li, M.Y. Hussaini, S.S. Sablin, R. Tannenbaum, and K. Dahmen, Mechanical properties of magnetically oriented epoxy. Polymer Science Part B: Polymer Physics, Vol. 42 (2004), pp.1586-1600.

DOI: 10.1002/polb.20037

[5] H. Garmestani, M.S. Al-Haik, K. Dahmen, R. Tannenbaum, D. Li, S.S. Sablin, and M.Y. Hussaini, Polymer-mediated alignment of carbon nanotubes under high magnetic fields. Advanced Materials, Vol. 15 (2003), p.1918-(1921).

DOI: 10.1002/adma.200304932

[6] D. Shi, P. He, J. Lian, X. Chaud, S.L. Bud'ko, E. Beaugnon, L.M. Wang, R.C. Ewing, and R. Tournier, Magnetic alignment of carbon nanofibers in polymer composites and anisotropy of mechanical properties. Journal of Applied Physics, Vol. 97 (2005).

DOI: 10.1063/1.1861143

[7] G.M. Vélez-Garcia, S. Mazahir, J. Hofmann, P. Wapperom, D. Baird, A. Zink-Sharp, V. Kunc, Improvement in orientation measurement for short and long fiber injection molded composites. 10th Annual SPE Automotive Composites Conference and Exhibition, Troy, MI, USA, September 15-16, (2010).

[8] K. Sun, B. Gu, J. Zhou, Study on fiber orientation of short-fiber-reinforced rubber matrix sealing composites based on digital image processing. International Conference on Measuring Technology and Mechatronics Automation, pp.524-527, Hunan, China, April 11-12, (2009).

DOI: 10.1109/icmtma.2009.498

[9] B. Mlekusch, Fibre orientation in short-fibre-reinforced thermoplastics II. Quantitative measurements by image analysis. Composites Science and Technology, Vol. 59 (1999), pp.547-560.

DOI: 10.1016/s0266-3538(98)00101-8