Effects of Coconut Coir Powders on the properties of Natural Rubber Composites

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teerakorn kongkaew
Sureeporn Kumneadklang
jate panichpakdee
Siriporn Larpkiattaworn


In this work, the coconut coir powders (CCP)/natural rubber (NR) composites were successfully prepared. The CCP acts as a reinforcing filler with two different sizes of fine powders (39 um) and coarse powders (101 um). The coconut coir powders added to the natural rubber matrix at the filler content of 25, 50, 75, and 100 phr. The effect of CCP contents on physical and mechanical properties was studied. The result revealed that the increase in CCP content has decreased the tensile strength and elongation at break of composites but increased the modulus of elasticity. The CCP/NR composite at 25 phr of filler loading shows better mechanical properties, whereas the CCP filler loading of 100 phr presented excellent hardness. For different sizes of fillers, the F-CCP exhibit the better mechanical properties compare to C-CCP.


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