Abstract
This paper reports the dielectric properties of banana fiber reinforced thermoplastic composites. In this research synthetic polymer, polypropylene was used matrix and natural fiber, banana fiber was used as the reinforcing material. Polypropylene [-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>2-</sub>]n and different fiber content (wt.%) of polypropylene-banana fibers (natural fiber) composites were fabricated using a hot-press moulding system. The short fiber percentages was varied as 0%, 10%, 20%, and 25% with the matrix materials. The optimum fabrication parameters were established (initial pressure, temperature, etc.), and also optimum short fiber percentage was selected. These composite test samples were fabricated so the short fibers were randomly oriented in the matrix. The electrical properties like dielectric constant and dielectric loss tanjent were measured by a dielectric measurement set up. The measurement was performed over a wide range of frequency of 60 Hz to 3 MHz and temperature range from 303K to 383K. The results obtained for the composite varied with the variation of fiber percentage. Experimental results of the dielectic properties of pure polypropylene and polypropylene-natural fiber composites were compared. It has been established that the fabricated composition changes its insulating property after adding the natural fibers. The certain percentage of natural fiber addition gives the better dielectric properties and dialectic tanjent.
Highlights
Natural fibers are the most common reinforcing fibers for polymer matrix composites due to their low cost, high electrical resistance, highest specific strength and densities compared with inorganic fibers and are used in many highvolume applications [1]
A number of natural fibers are available in Bangladesh. They can be used as reinforcing fibers due to their biodegrading and environment friendly characteristics [2]. These polymer-natural fiber composites can be used as electrical device and dielectric materials
In this article we report the electric and dielectric Properties of pure PP and PP-J composites
Summary
Natural fibers are the most common reinforcing fibers for polymer matrix composites due to their low cost, high electrical resistance, highest specific strength and densities compared with inorganic fibers and are used in many highvolume applications [1]. A number of natural fibers are available in Bangladesh. They can be used as reinforcing fibers due to their biodegrading and environment friendly characteristics [2]. These polymer-natural fiber composites can be used as electrical device and dielectric materials. These products have greater prospect in their use in material applications where relativity low density of the natural fibers is a major advantage. The present study has undertaken to measure the various electrical characteristics (ac conductivity, dielectric, loss tangent) of pure polymer and polymer-fiber composites and investigate the suitability of these composites to use as better dielectric material
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