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Microwave Dielectric Properties of Hevea Rubber Latex in the Temperature Range of -30°C to 50°C

Hassan, Jumiah and Khalid, Kaida and Wan Yusof, Wan Mohamad Daud (1997) Microwave Dielectric Properties of Hevea Rubber Latex in the Temperature Range of -30°C to 50°C. Pertanika Journal of Science & Technology, 5 (2). pp. 179-190. ISSN 0128-7680

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Abstract

The dielectric properties of hevea rubber latex were measured at selected microwave frequencies over the temperature range of -30°C to 50°C. The measurements were made on latex concentrate, fresh latex and diluted fresh latex by using an open-ended coaxial-line probe and an automated network analyser. There is a steep increase in the dielectric constant of about one order and dielectric loss factor of about two orders as the phase of latex changes from solid to liquid. The effect of temperature on the ionic conductivity at 0.2 GHz and dipole orientation at 2.6 GHz and above can be clearly seen in these studies. It was found that, the frequency around 10 GHz is a suitable operating frequency for microwave latexometer as dielectric properties are fairly independent of the temperature.

Item Type:Article
Keyword:hevea rubber latex, dielectric constant, dielectric loss factor, ionic conductivity, dipole orientation
Faculty or Institute:Faculty of Environmental Studies
Publisher:Universiti Putra Malaysia Press
ID Code:3320
Deposited By: Nur Izzati Mohd Zaki
Deposited On:25 Nov 2009 04:44
Last Modified:27 May 2013 07:07

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