Mechanical Performance Degradation of Naturally Aged Nitrile Butadiene Rubber in Low Frequency Range

Ammineni, Syam Prasad; Nagaraju, C.; Raju, D. Linga

doi:10.37591/jopc.v10i1.6143

Cited by 1 publication

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“…Sahu et al 17 analyzed the thermal degradation behavior of pigeon pea stalk and its potential as a bioenergy feedstock. Ammineni et al 18 conducted tests on NBR to estimate the detoriaotion in mechanical properties with natural aging. Montiano et al 19 studied the thermal decomposition of briquettes, achieving good agreement between experimental and calculated results.…”

Section: Introductionmentioning

confidence: 99%

Estimating shelf life and degradation mechanisms of nitrile butadiene rubber for viscoelastic dampers

Ammineni,

Lingaraju,

Nagaraju

2024

Journal of Elastomers & Plastics

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This study investigates the shelf life of nitrile butadiene rubber (NBR) based on age and temperature factors. Natural aging of nitrile butadiene rubber samples is performed under laboratory conditions for 2 years, followed by thermogravimetric analysis to evaluate Arrhenius parameters. Toop’s equation is used to predict shelf life at 5% conversion rate. Model-free kinetic methods, including Ozawa-Flynn-Wall (OFW), Kissinger-Akahira-Sunose (KAS), and Kissinger, estimate shelf life at different temperatures for both virgin and naturally aged nitrile butadiene rubber. Results show close correlation between KAS and Kissinger methods, with slight variations in activation energy impacting shelf life. Fourier-transform infrared spectroscopy (FTIR) tests assess functional group changes with age. Virgin nitrile butadiene rubber activation energy: OFW-73.33 kJ/mol, KAS-68.43 kJ/mol. Aged nitrile butadiene rubber activation energy: OFW-72.57 kJ/mol, KAS-67.88 kJ/mol. Shelf life at 40°C: Virgin nitrile butadiene rubber - OFW-111.29 years, KAS-26.31 years. Aged nitrile butadiene rubber - OFW-89.01 years, KAS-22.37 years. These findings provide valuable insights for predicting and assessing nitrile butadiene rubber viscoelastic damper performance in engineering applications.

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Section: Introductionmentioning

confidence: 99%