Abstract
Abstract The flexural strength and the impact strength of coir fibers reinforced polymer composites were studied using the universal testing machine and the impact meter. The composites sheets were prepared by melt compounding followed by the compression moulding technique. Two different concentrations i.e. 10 and 20% of diammonium phosphate (DAP) were taken for the coir fibers treatment. Both the untreated and the DAP treated coir fibers were reinforced at 10, 20 and 30 wt% for composites fabrication. The impact strength increased towards the DAP treatment to 20%. It was clearly observed from the experiment that the composites showed highest impact strength of 4.72 J/cm at the reinforcement of 30 wt% of 20% DAP treated coir fibers. The flexural strength of DAP treated coir composites were decreased for 10 and 20 wt% reinforcements than the untreated coir composites whereas at 30 wt% reinforcement the flexural strength increased. The flexural modulus value increased with the increase in DAP treatment as well as the fiber reinforcement.
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