Mechanical, flame‐retarding, and creep‐recovery proprieties of ethylene–propylene–diene monomer enhanced with nano‐hydroxide for undersea tunnel sealing gasket

Abstract

This study investigates the mechanical, flame-retarding, and creep-recovery proprieties of ethylene-propylene-diene monomer (EPDM) composites. The EPDM composites are filled with different contents of nano-Mg(OH) 2 (NMH) or nano-Al(OH) 3 (NATH). To examine the effect of contents of NMH (or NATH) and seawater immersion, mechanical tests are conducted and the limiting oxygen index (LOI) method was applied. Creep-recovery tests are then conducted to obtain the creep resistance property of EPDM composites with contents of NMH (or NATH). The microstructure of EPDM composites is investigated by using scanning electron microscopy (SEM). The results indicate that NMH (or NATH) can enhance the flame-retarding, creep resistance, and hardness properties, whereas tensile strength and elongation at break increase at first and then decrease with increasing content of NMH (or NATH). The Findley power law and the Weibull distribution function show good correspondence with the results of creep-recovery tests for EPDM composites. Furthermore, SEM results show good interfaces between nanoparticles and the matrix implying the mechanism of the above results.

Deformation Characteristics of Existing Twin Tunnels Induced by Double Shield Undercrossing with Prereinforcement: A Case Study in Hangzhou

“…Two Japanese Mitsubishi EPB shields with a diameter of 6340 mm were used to construct the tunnel. e type and size of tunnel segments are consistent with those of Metro Line 1. e segments are connected by high strength bolts, and the joints are waterproof with EPDM (ethylene-propylene-diene monomer) rubber sealing strip, which has good processing performance and aging resistance [40,41].…”

Effect of cyanide content on the tribological performance of nitrile butadiene rubber

“…The friction process results in leakage issues, which lead to a reduction in the hydraulic system energy or failure, a light effect on the integrity rate of aviation equipment, and a heavy impact that results in flight accidents 1–3 . Currently, nitrile butadiene rubber (NBR), 4–9 hydrogenated nitrile butadiene rubber (HNBR), 10,11 ethylene propylene diene monomer (EPDM), 12–14 and fluorocarbons (FKM) 15–17 are the primary materials used in conventional aviation sealing applications. NBR, a sealing material made by copolymerizing butadiene and acrylonitrile, is well known for its excellent solvent resistance, wear resistance, and environmental friendliness 18–21 .…”

Mechanical Aging Test and Sealing Performance of Thermoplastic Vulcanizate as Sealing Gasket in Automotive Fuel Cell Applications

“…Among these candidates, EPDM rubber is one of the most rapidly developing synthetic rubbers and possesses inherent resistance to heat, light, and fuel/oil [12][13][14] owing to its saturated hydrocarbon backbone with the presence of double bonds in the side chains. Thus, it is widely used as a seal or gasket material in many industrial applications, including fuel cells [15][16][17].…”