Physical and Mechanical Properties of ENR Compatibilized NR/NBR Blends Reinforced Nanoclay and Nanosilica

Abstract

Summary Properties of the unfilled rubber blends (Natural rubber, NR and Nitrile Butadiene Rubber, NBR) were poor due to the absence of reinforcing agent. However, the strength of compound had been improved with the addition of nanofiller. There were two (2) types of nanofillers that had been introduced which are nanoclay (NC) and nanosilica (NS). NR/NBR composites were prepared by open milling process where different amount of nanofiller was added ranging from 1 until 7 phr. There are a few possibilities might occur when using small particles size of fillers especially in term of interaction between rubber‐filler and filler‐filler interaction. Apart from that, different polarity and composition of both rubbers were influenced the interaction between filler and rubber phases. The interaction between non‐polar and polar rubber was enhanced using epoxidized natural rubber (ENR). The rubber compound was cured via a conventional sulphur vulcanization system. The cure characteristic result shows that the incorporation of nanofiller does not affect much on the t90. The physical and mechanical properties of epoxidized natural rubber (ENR) compatibilized NSi‐NR/NBR blends were determined by conducting the density measurements, hardness and tensile tests. The NC filler gave the highest tensile strength compared to NS. On top of that, reduction trend on the tensile strength observed at 3 phr of NS loading due to the formation of NS aggregates. The values of moduli, hardness and densities of vulcanizates increased as the nanofiller loading increased. It occurs due to better filler dispersion in the rubber matrix and strong interaction between filler‐rubber phases. The result shows that NC has more pronounce effect on the physical and mechanical proportion of the rubber vulcanizates.

Enhancement of Chloroprene/Natural/Butadiene Rubber Nanocomposite Properties Using Organoclays and Their Combination with Carbon Black as Fillers

“…Moreover, nanocomposites with the CB filler at 40 phr did not show higher tensile strength values than those prepared only with organoclays (e.g., A10-7, A15-5, A15-7). These results showed a better interaction in organoclays with rubber phases than in those with the conventional filler of carbon black because the enhancement of the tensile strength of nanocomposites reflected the efficiency in stress transfer from the rubber phases to fillers [27].…”

The effect of nanoclay on mechanical and swelling resistance properties of ternary rubber (NR/SBR/NBR) blends nanocomposites

“…Despite these limitations, NR remains an economical choice in contrast to Nitrile Butadiene Rubber (NBR), offering the opportunity to formulate a blend of NBR with NR. This blend not only helps mitigate the overall cost of rubber products but also allows the retention of the desired properties inherent to NBR [11].…”

Studies on swelling behavior, mechanical and thermal properties of ternary rubber blend composites in the presence of compatibilizers

“…Compatibility between components is a key factor in assessing the functional utility of each type of blend. If the rubbers in the blend are incompatible, the phase separation can result in a poor mechanical performance compound (Jovanovic et al , 2017; Romli and Mamauod, 2017; Abdelsalam et al , 2020). The final physicomechanical properties of polymer blends depend mainly on strong interactions between the components of blends.…”