By: Haydar U. Zaman
1Assistant Professor, Department of Physics, National University of Bangladesh and Institute of Radiation and Polymer Technology, NBangladesh Energy Commission, P.O. Box-3787, Savar, Dhaka, Bangladesh
Fiber reinforced polymer composites have a long history of being significant in a variety of applications because of their exceptional specific strength and modulus. An alternative to synthetic polymers that pollute the environment is provided by thermoplastic and vetiver fiber (VF) composites. In comparison to conventional reinforcing fibers (glass and carbon fiber), natural fibers (such as banana, sisal, coir, jute, vetiver, flax, hemp, and kenaf) have the following benefits: they are easier to obtain, renewable, noncorrosive, light density, biodegradable, have a high specific energy (strength of density ratio), and are less expensive. An inexpensive and ecologically friendly alternative to the costly chemical treatment of VF in polymer composites is VF length control. VF-reinforced low-density polyethylene (LDPE) composites were modified in the current study by utilizing the hot press compression molding technique in conjunction with the film process stacking method. A range of process parameters were employed, including VF condition (untreated and treated with sodium dodecyl sulfate (SDS)), VF sizes (short-VF is less than three centimeters and long-VF is greater than three centimeters), and VF percent (5, 10, and 15 weight %). The tensile modulus and modulus efficiency factor of the LDPE composite were examined in relation to the impacts of VF size, VF content, and SDS treatment. The results shown that, as a result of increased load bearing and interfacial adhesion, VF content up to 10 wt. %, processing temperature up to 160°C, and SDS treatment during processing for up to five hours, all increased a certain amount of tensile modulus and modulus efficiency factor. Long-VF load transfers have obviously had a positive effect, as seen by the improvement in tensile modulus and its efficiency factor as a result of efficient load transfer. The fibers’ brittleness led to a decrease in their ductility.
Citation:
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