Development of Calibration Equation Based on Complex Permittivity of Hevea Rubber Latex

Nor Zakiah Yahaya, Zulkifly Abbas, Muhamad Zamri Yahaya, Amizadillah Norimi, Nik Noor Ashikin Abd Razak, Iskandar Shahrim Mustafa


In rubber industry, the price of Hevea latex depends on the percentage of moisture content. Since water occurs on most materials in nature as a natural component of the material or is introduced during technologies processes, it is quite obvious that mesasurement and control of moisture content have great economic and technical importance. Thus, in this work, measurements of loss tangent have been done using Agilent Dielectric Probe Kit 85070E. The calibration equations have been established between 1 GHz to 5 GHz. It was found to be most accurate at 5 GHz with lowest mean error, 0.07 using the loss tangent method.


Complex permittivity, loss tangent, rubber latex, calibration equation

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Chin, H. C. RRIM Training Manual on Analytical Chemistry, Research Institute Malaysia, Kuala Lumpur , 1979.

Khalid, K., Daud, W. M. “Dielectric properties of natural rubber latex at frequencies from 200MHz to 2500 MHz,”Journal of Natural Rubber Research, Vol. 7(4), pp 281-289,1992.

Bahl,I. J., Bhartia, P., senior member, IEEE, and Stuchly, S. S., senior member,”Microstrip Antennas Covered with a Dielectric Layer,” IEEE Transactions on Antennas and Propagation, AP-30(2), 314–318, 1982.

Malaysian Standard, MS 466: Methods of Sampling and Testing Field Latex (First Revision), SIRIM : Standard & Research Institute of Malaysia, 1987.

Kudra, T., Raghavan, G. S. V., Akyel, C., Bosisio, R. and Van de Voort, F. R.,“Electromagnetic properties of milk and its constituents at 2.45 MHz,” International Microwave Power Institute Journal, 27(4), 199-204, 1992.

Weimer, L. and R. Jansen, “Reciprocity related definition of strip characteristic impedance for multiconductor hybrid mode transmission lines,” Microwave and Optical Tech. Lett., vol. 1, pp. 22-25, 1988.

Yahaya, Nor Zakiah, et al. "Intercomparison of Methods for Determination of Resonant Frequency Shift of a Microstrip Patch Antenna Loaded with Hevea Rubber Latex." Journal of Sensors, 2014, pp. 1-9, 2014.


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