Influence of a Novel Hardener <i>p</i>-toluene Sulfonic Acid on Mechanical and Wear Response of Phenolic-Based Friction Materials

Pai, Anand; Kini, Vijaya M; Pokharel, Vishesh

doi:10.1080/10402004.2016.1211779

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…The influence of rubber on different physico-mechanical properties of the composites is evaluated for comparative assessment. Table 3 shows the results of density, hardness, 3 . However, density of EPDM-based composite is lesser compared to NBR and SBR based composites, which is likely because of the lower density of EPDM (0.85 g/cm 3 ) than NBR and/or SBR.…”

Section: Physico-mechanical Propertiesmentioning

confidence: 99%

“…wear loss both from its surface and counter surface [3]. To satisfy all these complex requirements, friction material is made of ten or more different components, and the formulation is often developed through a series of trial-anderror process at the brake industries because the performance of the friction material also depends on operating variables like load, speed, temperature along with the type and amount of raw materials [4].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of tribological and thermo-mechanical properties of phenolic resin friction composites by improving interactions between elastomeric phase and matrix resin

2020

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New elastomer-modified brake friction composites with the identical composition, but differing in the type of rubber, were developed by altering polar/non-polar elastomeric phases into the phenolic resin matrix. Effect of dispersion and interaction of the polar/non-polar rubbers with the matrix resin on dry sliding wear characteristics of the friction composites was investigated using a laboratory-scale pin-on-disc tribometer. The composites were prepared by hot mixing followed by compression molding and post-curing at a high temperature. Coefficient of friction (COF) and specific wear rate of the composites sliding against a cast-iron disc were measured and analyzed. Polar acrylonitrile-butadiene rubber (NBR, both powder, and bale rubber), and non-polar styrene-butadiene rubber (SBR) and ethylene-propylene-diene monomer (EPDM) were used with the phenolic resin where rubber islands and its polarity played the key role in delayed stress dissipation, while the hard matrix phase contributed to the intrinsic strength of the composites. This work describes how the distribution and interaction of polar and non-polar rubbers with the matrix resin influence the performance of brake friction composites. NBR (powder)-phenolic composite showed the highest stable average COF of 0.52 as compared to 0.36 for EPDM-based composite. NBR (powder)-based composite also exhibited ~1.5 times better specific wear rate (4.9 × 10 −3 mm 3 N −1 m −1) than EPDM-based composite (7.2 × 10 −3 mm 3 N −1 m −1). However, EPDM rubber-based composite showed a significant enhancement in thermal conductivity (0.43 W/m K). Morphological analyses revealed that the dispersion of rubber phase in phenolic matrix played a significant role in transforming the wear mechanism from abrasive to adhesive.

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Section: Physico-mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of tribological and thermo-mechanical properties of phenolic resin friction composites by improving interactions between elastomeric phase and matrix resin

2020

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“…Friction composite material is defined as a material used to resist the sliding its contacting surface and counter surface in a controlled manner. [1,2] The properties of friction composite materials are affected by braking conditions such as sliding speed, load, and temperature. In recent years, various studies have been carried out on friction composite formulations, resulting in improved heat resistance and friction-wear properties during application.…”

Section: Introductionmentioning

confidence: 99%

The evolution of tribological properties of graphite and glass fiber reinforced novolac matrix hybrid composites

Kocaman

Çuvalcı

2022

Polymer Composites

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Reinforcing the novolac matrix with glass fiber (GF) and graphite (Gr) was a promising method for producing high‐performance friction composites. In this context, the morphology of the matrix and additive particles used in the production of friction composites, microstructures, wear surfaces, and wear debris of friction composites were examined by scanning electron microscopy‐energy dispersive spectroscopy, while the crystal phases of the materials were scanned by X‐ray diffraction. Density measurements (Archimed's method), hardness, tensile behaviors, and thermal analyses (thermogravimetric analysis and differential scanning calorimetry) of friction composites were performed. The variations in coefficient of friction (COF) and temperature with the change in sliding time were observed in detail at different additive ratios. The tribological behaviors of these composites were tested using a computer supported block‐on ring machine at sliding speeds of 200, 250, 300, and 350 rpm, applied loads of 50, 100, 150, and 200 N and constant time of 1800 s under dry conditions. Results indicated that with increase in the GF and Gr content, the stability of the (COF) became more stable and effectively reduced the specific wear rate. In addition, the wear resistance increased in parallel with the increase in normal loads and sliding speeds for all conditions.

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Miscellaneous Applications for Coir and Other Coconut By-products

Reddy¹

2019

Sustainable Applications of Coir and Other Coconut by-Products

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Influence of a Novel Hardener p-toluene Sulfonic Acid on Mechanical and Wear Response of Phenolic-Based Friction Materials

Cited by 4 publications

References 13 publications

Enhancement of tribological and thermo-mechanical properties of phenolic resin friction composites by improving interactions between elastomeric phase and matrix resin

Enhancement of tribological and thermo-mechanical properties of phenolic resin friction composites by improving interactions between elastomeric phase and matrix resin

The evolution of tribological properties of graphite and glass fiber reinforced novolac matrix hybrid composites

Miscellaneous Applications for Coir and Other Coconut By-products

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