Microwave Dielectric Properties of Hevea Rubber Latex in the Temperature Range of -30°C to 50°C
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 analys...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Universiti Putra Malaysia Press
1997
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| Online Access: | http://psasir.upm.edu.my/id/eprint/3320/ http://psasir.upm.edu.my/id/eprint/3320/1/Microwave_Dielectric_Properties_of_Hevea_Rubber_Latex_in_the.pdf |
| Summary: | 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. |
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