Abstract
This research focuses on the impact of adding materials such as carbon black and polymer of carboxyl methylcellulose on the the rheological properties of styrene butadiene rubber (SBR) and natural rubber (NR) which was studied as a matrix. The present study was a carried out by two groups according to the loading level of carboxyl methylcellulose (CMC) and carbon black(C.B) its molecular weight (N660) which their used as stiffeners in the composites. on the other side, rheometer tests carried according to ASTM D 2705 For the purpose use these composites in various tire making and fender ship. All composites are consisting of carbon black (C.B) N660 (0, 10, 10, 10, 10) pphr and carboxyl methyl cellulose (CMC) (0, 0, 10, 20, 30) pphr respectively for the first group (A) and (0, 20, 20, 20, 20) pphr for C.B, (0, 0, 10, 20, 30) pphr for CMC for the second group (B). The maximum torque, minimum torque, scorch time, viscosity and Tc90 optimum curing time were checked. The results revealed that the parameters differ according to the level of loading. Viscosity, lower torque, maximum torque and optimal curing were reduced for increasing loading ratio of the C.B and CMC. As well, an optimal curing time of the TC90 burning time was reduced as addition ratios of the carbon black (C.B) and carboxyl methyl cellulose (CMC) increased.
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