Technical Paper Archive

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Optimization of Natural Rubber OTR Tread Compound with Multi-wall Carbon Nanotubes and Oil

B13 krupp paper

Event: 198th Technical Meeting - Fall 2020
Location: Virtual
Date: October 19, 2020
Author: August Krupp
Paper Number: B13

Price: $20.00

  • Previous studies demonstrated tailored multi-wall carbon nanotubes (MWCNTs), Molecular RebarĀ® (MR), significantly improved the wear resistance of elastomer compounds, such as off-the-road (OTR) tire treads. A facile delivery system for the Molecular Rebar is to use the oil commonly used in rubber formulation to create a masterbatch, with the product termed MRO. These oils are typically naphthenic, residual aromatic extract (RAE), or treated distillate aromatic extract (TDAE). However, some portions of the targeted wear-resistant, high-performance rubber market utilize oil-less formulations, particularly formulas comprised wholly of filled natural rubber for ultra-tough compounds. Addition of small quantities of oil to typically oil-less formulations can improve processability but may cause a decrease in hardness and abrasion resistance. This paper details an experimental design to explore the relationship of properties between MR, CB, and oil in a 100% NR OTR formulation. From this design, an optimized formula with MR provides 25%+ cut & chip resistance, with ~5% change to rolling resistance. This result shows that no segment of the wear-resistant rubber industry should be considered off-limits for the adoption of MRO; there are new rules of optimization for every OTR formulation.

    Papers from 198th Technical Meeting - Fall 2020

    Items from 198th Technical Meeting - Fall 2020