Elastic Behavior of NR/IIR Rubber Blend Loaded with Different Compatibilizers

Abstract

Abstract The effect of the addition of different compatibilizers such as bromobutyl rubber (BIIR) and maleic anhydride (MA) on the elastic behavior of natural rubber/butyl rubber (NR/IIR) blend has been studied by carrying out equilibrium stress-strain measurements for these blends. From the stress-strain curves, Young's modulus was found to have a maximum value at around 5 phr of BIIR and two maxima were observed at 2 and 12.5 phr of maleic anhydride. The modified Mooney-Rivlin equation was used to calculate the parameters C1 and C2. The Song et al. model was tested here to fit the stress-strain curves at both small and large strain, which is capable of accurately describing the mechanical behavior of these blends. Keywords: bromobutylcompatibilizersmaleic anhydridenatural and butyl rubberrubber blend Notes *Base recipe (in phr): (NR) nature rubber 50, (IIR) butyl rubber 50, stearic acid 1.5, zinc oxide 5, oil; 3, HAF; 20, N-isorpropyl-N-phenyl-p-phenylebe diamine (IPPD); 1, N-cyclochexyl-2-benzothiazole sulphonamide (CBS) 0.8, sulfur 2.