Tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing

Acrylonitrile–butadiene rubber (NBR) is an important tribological material that is often used in dynamic sealing pairs (as rubber/metal seal-pairs), but often degrades prematurely because of thermal oxidation ageing. In this work, NBR seals were exposed to an accelerated thermal ageing atmosphere at...

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Autores principales:	Bo Li, Sheng-xin Li, Ming-xue Shen, Ye-long Xiao, Jian Zhang, Guang-yao Xiong, Zhi-nan Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Thermal oxidative ageing Tribological behaviour Friction energy dissipation Rubber seals Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/be9b3d46898f40c284632137f0b6bb0a
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spelling	oai:doaj.org-article:be9b3d46898f40c284632137f0b6bb0a2021-11-24T04:24:54ZTribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing0142-941810.1016/j.polymertesting.2020.106954https://doaj.org/article/be9b3d46898f40c284632137f0b6bb0a2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0142941820321838https://doaj.org/toc/0142-9418Acrylonitrile–butadiene rubber (NBR) is an important tribological material that is often used in dynamic sealing pairs (as rubber/metal seal-pairs), but often degrades prematurely because of thermal oxidation ageing. In this work, NBR seals were exposed to an accelerated thermal ageing atmosphere at different temperatures and time periods, and the aged NBRs were evaluated for their mechanical properties, tribological behaviour, and energy dissipation. The results showed that thermal oxidation ageing has a substantial effect on rubber properties. The hardness and bulk modulus of rubber increased, whereas its tensile strength and tear strength decreased remarkably with increasing ageing temperature and time. The evolution trends of rubber ageing can be divided into three regions (A, B, and C) according to different ageing degrees (high elastic state, weakened elastic state, and hardening state). The damage mechanism of each region is obviously different. The wear mechanism gradually changes from adhesive wear to abrasive wear, or fatigue and abrasive wear. Although the average wear rate decreases with the increase of ageing parameters, mechanical properties, such as viscoelasticity, fracture resistance, and tear resistance, were severely reduced or even disappeared. The adhesion and hysteresis characteristics of the rubber during friction were remarkably disturbed because of their ageing degradation. Therefore, different energy dissipation characteristics in friction were presented for various aged rubbers.Bo LiSheng-xin LiMing-xue ShenYe-long XiaoJian ZhangGuang-yao XiongZhi-nan ZhangElsevierarticleThermal oxidative ageingTribological behaviourFriction energy dissipationRubber sealsPolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 93, Iss , Pp 106954- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Thermal oxidative ageing Tribological behaviour Friction energy dissipation Rubber seals Polymers and polymer manufacture TP1080-1185
spellingShingle	Thermal oxidative ageing Tribological behaviour Friction energy dissipation Rubber seals Polymers and polymer manufacture TP1080-1185 Bo Li Sheng-xin Li Ming-xue Shen Ye-long Xiao Jian Zhang Guang-yao Xiong Zhi-nan Zhang Tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing
description	Acrylonitrile–butadiene rubber (NBR) is an important tribological material that is often used in dynamic sealing pairs (as rubber/metal seal-pairs), but often degrades prematurely because of thermal oxidation ageing. In this work, NBR seals were exposed to an accelerated thermal ageing atmosphere at different temperatures and time periods, and the aged NBRs were evaluated for their mechanical properties, tribological behaviour, and energy dissipation. The results showed that thermal oxidation ageing has a substantial effect on rubber properties. The hardness and bulk modulus of rubber increased, whereas its tensile strength and tear strength decreased remarkably with increasing ageing temperature and time. The evolution trends of rubber ageing can be divided into three regions (A, B, and C) according to different ageing degrees (high elastic state, weakened elastic state, and hardening state). The damage mechanism of each region is obviously different. The wear mechanism gradually changes from adhesive wear to abrasive wear, or fatigue and abrasive wear. Although the average wear rate decreases with the increase of ageing parameters, mechanical properties, such as viscoelasticity, fracture resistance, and tear resistance, were severely reduced or even disappeared. The adhesion and hysteresis characteristics of the rubber during friction were remarkably disturbed because of their ageing degradation. Therefore, different energy dissipation characteristics in friction were presented for various aged rubbers.
format	article
author	Bo Li Sheng-xin Li Ming-xue Shen Ye-long Xiao Jian Zhang Guang-yao Xiong Zhi-nan Zhang
author_facet	Bo Li Sheng-xin Li Ming-xue Shen Ye-long Xiao Jian Zhang Guang-yao Xiong Zhi-nan Zhang
author_sort	Bo Li
title	Tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing
title_short	Tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing
title_full	Tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing
title_fullStr	Tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing
title_full_unstemmed	Tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing
title_sort	tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/be9b3d46898f40c284632137f0b6bb0a
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Tribological behaviour of acrylonitrile-butadiene rubber under thermal oxidation ageing

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