Relationships between properties and rapid gas decompression (RGD) resistance of various filled nitrile butadiene rubber vulcanizates under high-pressure hydrogen. (March 2022)

• Record Type: Journal Article
• Authors: Jeon, Sang Koo; Kwon, Oh Heon; Tak, Nae Hyung; Chung, Nak Kwan; Baek, Un Bong; Nahm, Seung Hoon
• Is Part Of: Materials today communications. Volume 30(2022)
• Publication Date: 2022-03
• Subjects: Nitrile butadiene rubber (NBR) -- Rapid gas decompression (RGD) -- High abrasion furnace (HAF) filler -- Medium thermal (MT) filler -- Silica filler -- High-pressure hydrogen; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2021.103038
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: We evaluated the crosslink density, permeability, tensile properties, hardness of NBR vulcanizates, featuring different fillers and contents, and correlated the properties of the filled nitrile butadiene rubber (NBR) vulcanizates with their resistance to rapid gas decompression (RGD). Also, we investigated the relationship between the relative change in the properties of filled NBR vulcanizates, induced by exposure to high-pressure hydrogen, and their RGD resistance. The crosslink density, tensile strength, hardness of filled NBR vulcanizates, the associated solubility coefficient, as well as the resistance of the filled NBR vulcanizates to high-pressure hydrogen increase with increasing filler content while the RGD resistance, elongation at break, permeability coefficient of the filled NBR vulcanizates, as well as the associated diffusivity coefficient of hydrogen decrease. These results indicate that the properties of NBR vulcanizates are closely related to their resistance to high-pressure hydrogen. The properties of filled NBR vulcanizates are impaired by exposure to high-pressure hydrogen, regardless of filler type and content, and the relative change in their elongation at break and volume is related to their RGD resistance. In addition, the properties and resistance to high-pressure hydrogen of HAF and silica-filled NBR vulcanizates are superior to those of MT-filled NBR vulcanizates. Therefore, HAF and silica-filled NBR vulcanizates are more suitable for application in high-pressure hydrogen facilities. Additionally, the compatibility of filled NBR vulcanizates can be estimated to some extent through relative change in elongation at break and volume resulting from exposure to high-pressure hydrogen. Highlights: Evaluation of relationships between the RGD and properties of various filled NBR vulcanizates using high-pressure hydrogen. Various tests were performed to obtain the crosslink density, permeability and mechanical properties of NBR vulcanizates. Resistance to high-pressure hydrogen is closely related to the properties of various filled NBR vulcanizates. Effect of high-pressure hydrogen on the mechanical properties of NBR vulcanizates was evaluated. Relative change in elongation at break and volume is also related to the RGD resistance of NBR vulcanizates.