Dielectric properties of natural rubber latex at frequencies from 200 MHz to 2500 MHz

Kaida Khalid, . and Mohamad Daud W., . Dielectric properties of natural rubber latex at frequencies from 200 MHz to 2500 MHz. pp. 281-289. ISSN 0127-7065

Experimental results for dielectric properties of natural rubber latex at 26 degrees C over a frequency range of 200 Megahertz to 2500 Megahertz are presented. The study includes the variation of dielectric constant and dielectric loss factor with moisture content ranging from 40 percent to 100 percent (wet basis). A series of solution with various moisture contents were prepared from latex concentrate diluted latex concentrate freshly tapped latex and diluted fresh latex. Measurement of the dielectric properties was done by using open-ended co-axial line sensor and automated network analyser. Interesting results such as transition in the form of dielectric loss from conductive mechanism possibly due to interfacial polarisation to dipole orientation of water molecules at about 2 Gegahertz were observed. A substantial conduction effect due to ammonia solution and conducting phases and preservative is not detectable i.e. independent of the type of solutions. A suggestion for future design of moisture content sensor for Hevea latex in this range of frequency is indicated

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Abstract

Experimental results for dielectric properties of natural rubber latex at 26 degrees C over a frequency range of 200 Megahertz to 2500 Megahertz are presented. The study includes the variation of dielectric constant and dielectric loss factor with moisture content ranging from 40 percent to 100 percent (wet basis). A series of solution with various moisture contents were prepared from latex concentrate diluted latex concentrate freshly tapped latex and diluted fresh latex. Measurement of the dielectric properties was done by using open-ended co-axial line sensor and automated network analyser. Interesting results such as transition in the form of dielectric loss from conductive mechanism possibly due to interfacial polarisation to dipole orientation of water molecules at about 2 Gegahertz were observed. A substantial conduction effect due to ammonia solution and conducting phases and preservative is not detectable i.e. independent of the type of solutions. A suggestion for future design of moisture content sensor for Hevea latex in this range of frequency is indicated

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Item Type:	Article
Additional Information:	5 ill.; 1 table; 10 ref.; Summary (En)
AGROVOC Term:	HEVEA BRASILIENSIS
AGROVOC Term:	LATEX
AGROVOC Term:	PROPIEDADES DIELECTRICAS
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:56
URI:	http://webagris.upm.edu.my/id/eprint/20564

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