Modal performance degradation of naturally aged NBR

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

doi:10.1016/j.polymertesting.2022.107710

Cited by 9 publications

(8 citation statements)

References 29 publications

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“…The FT-IR results of the biodegradation phases showed two new vibrational bands that emerged at 1738 cm −1 , corresponding to aldehydes (C=O), and a second peak of aliphatic amines (C-N) at 1216 cm −1 . The presence of C=O suggests the conversion of unsaturated carbon bonds and the decreased presence of the nitrile group in nitrile gloves [ 48 ]. Similar results were reported by Nawong et al [ 20 ] in their study on rubber latex gloves, where they observed the presence of aldehydes close to the analyzed FT-IR region (at 1634 cm −1 ).…”

Section: Resultsmentioning

confidence: 99%

Biodegradation of Nitrile Gloves as Sole Carbon Source of Pseudomonas aeruginosa in Liquid Culture

Delgado-Nungaray,

Grajeda-Arias,

Reynaga-Delgado

et al. 2024

Polymers

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Nitrile gloves have become a significant environmental pollutant after the COVID-19 pandemic due to their single-use design. This study examines the capability of P. aeruginosa to use nitrile gloves as its sole carbon energy source. Biodegradation was determined by P. aeruginosa adapting to increasing nitrile glove concentrations at 1%, 3%, and 5% (w/v). The growth kinetics of P. aeruginosa were evaluated, as well as the polymer weight loss. Topographic changes on the glove surfaces were examined using SEM, and FT-IR was used to evaluate the biodegradation products of the nitrile gloves. Following the establishment of a biofilm on the glove surface, the nitrile toxicity was minimized via biodegradation. The result of the average weight loss of nitrile gloves was 2.25%. FT-IR analysis revealed the presence of aldehydes and aliphatic amines associated with biodegradation. SEM showed P. aeruginosa immersed in the EPS matrix, causing the formation of cracks, scales, protrusions, and the presence of semi-spherical particles. We conclude that P. aeruginosa has the capability to use nitrile gloves as its sole carbon source, even up to 5%, through biofilm formation, demonstrating the potential of P. aeruginosa for the degradation of nitrile gloves.

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Section: Resultsmentioning

confidence: 99%

Biodegradation of Nitrile Gloves as Sole Carbon Source of Pseudomonas aeruginosa in Liquid Culture

Delgado-Nungaray,

Grajeda-Arias,

Reynaga-Delgado

et al. 2024

Polymers

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“…The spectrum shows the characteristic bands of NBR: two peaks at 2924 and 2854 cm –1 associated with the C–H stretching vibration, the 2238 cm –1 peak corresponding to the stretching vibration of the carbon–nitrogen triple bond of the nitrile group. A strong absorption band at 1722 cm –1 associated with the stretching vibration of CO, the signal at 1436 cm –1 attributed to the C–H bending vibration in CH 2 , and the band at 970 cm –1 related to the out-of-plane bending vibration of C–H. − …”

Section: Results and Discussionmentioning

confidence: 99%

Evaluation of Strain Sensors Based on Poly(acrylonitrile-co-butadiene) and Polypyrrole Synthesized by the Diffusion Method

Encinas-Encinas,

Castillo-Ortega,

del Castillo-Castro

et al. 2024

ACS Omega

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In this study, the functionality of an elastomer composite material containing polypyrrole (PPy) as a stress sensor was evaluated. The material was prepared using the swelling method by diffusing the pyrrole monomer into the elastomer before polymerization. To achieve adequate diffusion, organic solvents with affinity for the elastomer were used. The resulting materials were characterized by scanning electron microscopy (SEM), surface electrical resistance, and thermal and mechanical properties for application as a stress sensor. The simultaneous change in electrical resistance and tension stress was measured using a digital multimeter with electrodes connected to the jaws of a universal mechanical testing machine. The influence of stress cycles on the piezoresistivity of the composite materials was investigated. The obtained PPy/NBR composite presented a good combination of electrical conductivity and mechanical properties. The strain at break remained with mild variation after coating with PPy.

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“…The molecular chains of nitrile rubber contains polar group cyano groups (-CN) to withstand nonpolar oils. [18][19][20] However, the mechanical properties and vulcanization speed of NBR are not as good as SBR. And NBR has greater processing difficulty, so SBR and NBR can be blended to obtain composite materials with good processability, vulcanization speed, mechanical properties and oil resistance.…”

Section: Introductionmentioning

confidence: 99%

Polar modification‐enhanced interfacial compatibility for high‐performance rubber blends

Xu,

Liu,

Liu

et al. 2024

J of Applied Polymer Sci

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The blending of different elastomers can greatly broaden the application range of rubber materials. However, due to the poor compatibility between polar elastomers and non‐polar elastomers, severe phase separation occurs during the blending process, which severely degrades their processing performance and mechanical properties. In this paper, we prepared SBR‐P/XNBR blends by emulsion blending polar modified styrene‐butadiene rubber (SBR‐P) latex with carboxylated nitrile rubber (XNBR) latex. The effects of the blending ratios on the vulcanization behavior, mechanical strength, dynamic mechanical properties, and oil resistance of the rubber compounds were studied. Experimental results showed that the mechanical strength and oil resistance of the modified SBR‐P/XNBR blends are significantly higher than the unmodified SBR and XNBR blends. The dynamic mechanical analysis curve results of the rubber compounds showed that SBR‐P has good compatibility with XNBR. With the increasing addition of XNBR, the oil resistance of the rubber compounds improves, and the solvent adsorption is reduced by over 60%.This study proposes a solution for utilizing non‐polar rubbers, which are typically not oil‐resistant, in oily environments. The proposed solution enables the preparation of composites with excellent mechanical properties in such environments.

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Modal performance degradation of naturally aged NBR

Cited by 9 publications

References 29 publications

Biodegradation of Nitrile Gloves as Sole Carbon Source of Pseudomonas aeruginosa in Liquid Culture

Biodegradation of Nitrile Gloves as Sole Carbon Source of Pseudomonas aeruginosa in Liquid Culture

Evaluation of Strain Sensors Based on Poly(acrylonitrile-co-butadiene) and Polypyrrole Synthesized by the Diffusion Method

Polar modification‐enhanced interfacial compatibility for high‐performance rubber blends

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