Next Article in Journal
Influence of Electron Beam Irradiation on Electrical Insulating Properties of PLA with Soft Resin Added
Previous Article in Journal
Effect of Intercalation Structure of Organo-Modified Montmorillonite/Polylactic Acid on Wheat Straw Fiber/Polylactic Acid Composites
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Polymers 2018, 10(8), 897; https://doi.org/10.3390/polym10080897

Synergistic Effects of Multiple Environmental Factors on Degradation of Hydrogenated Nitrile Rubber Seals

School of Reliability and Systems engineering, Beihang University, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Received: 28 June 2018 / Revised: 6 August 2018 / Accepted: 7 August 2018 / Published: 10 August 2018
Full-Text   |   PDF [3858 KB, uploaded 13 August 2018]   |  

Abstract

Degradation tests of hydrogenated nitrile rubber seals, often used as sealing components in hydraulic systems, were conducted under the free and compression state in air and hydraulic oil at three elevated temperatures for several days to investigate the synergistic effects among three factors. The crosslinking and chain scission reactions both occurred simultaneously at higher temperature during the degradation process, and crosslinking predominated for most cases. Additionally, the synergistic effect between compression stress and hydraulic oil further slowed the degradation rate by limiting oxygen access. However, the higher temperature and hydraulic oil both promoted the formation of oxidation products, whereas the compression stress restrained the formation of amide groups. The fracture morphology results show that the defects gradually formed on the fracture surface, especially for the uncompressed specimens. The increase of the compression set aged in air was more than that in hydraulic oil, implying the more serious degradation. Moreover, rubber seals under the synthetic effect of three environmental factors presented the minimum degradation level. The degradation of the compressed and uncompressed specimens exposed to hydraulic oil is more serious than that of specimens exposed to air. View Full-Text
Keywords: hydrogenated nitrile rubber seals; degradation; compressive stress; elevated temperature; hydraulic oil; crosslinking hydrogenated nitrile rubber seals; degradation; compressive stress; elevated temperature; hydraulic oil; crosslinking
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Lou, W.; Zhang, W.; Jin, T.; Liu, X.; Dai, W. Synergistic Effects of Multiple Environmental Factors on Degradation of Hydrogenated Nitrile Rubber Seals. Polymers 2018, 10, 897.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top