The effects of various bonding agents on curing characteristics and mechanical properties of oil palm wood flour (OPWF) filled natural rubber composites were examined. Compared to control compound the presence of various bonding agents increase the curing time, t90 , maximum torque (except phenol formaldehyde(PF) and resorsinol formaldehyde(RF)/Silica(Sil)), tensile strength, tensile modulus (except PF and RF/ Sil), and hardness (except PF) but decrease the elongation at break and fatigue life of the composites. Swelling test results indicate that the presence of various bonding agents lead to stronger adhesion at the OPWF-rubber interface. Overall results indicate that RF/Sil/Hexa (Hexamethylene tetramine) is the most suitable bonding system for OPWF filled natural rubber composites.
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Ismail et al. (2001) studied this question.
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