The effect of curing on sorption and diffusion of a brake fluid in EPDM elastomer

Abstract

The effect of a poly(ether glycol) brake fluid on cured EPDM (ethylenepropylene- diene monomer) elastomer based on 5-ethylidene-2-norborene has been studied. Different amounts of dicumyl peroxide (DCP) curing agent were used and the effect of ageing in a brake fluid (at 100°C for 70 h) on technical properties of EPDM have been investigated. By increasing the amount of DCP, significant changes were not observed. Tensile strength and modulus increased but elongation at break and abrasion loss decreased due to oxidative degradation and crosslinking. Hardness was constant due to the replacement of plasticizer with brake oil.

Influence of friction on the surface characteristics of EPDM elastomers with different carbon black contents

“…For EPDM V1=0 and, thus, Pe1=0. Therefore (1) can be simplified as: (3) The following parameters were used for the calculation of the flash temperature: λ1=0.25 Wm −1 K −1 , λ2=47 Wm −1 K −1 , ρ1=103 kg m −3 , ρ2=7.8×103 kg m −3 , Cp1=103 J kg −1 K −1 [18], [19], Cp2=5×102 J kg −1 K −1 and b=2-4 mm (the highest value corresponds to the unfilled EPDM). The flash temperature in the contact zone determined from (3) ranged between 2.89 and 5.79 °C, depending on b.…”

“…Ethylene-propylene-diene monomer rubber (EPDM) is one of the synthetic ethylenepropylene rubbers, the use of which is rapidly growing in different applications such as waterproof coatings, rubber contact switches, floor heating, electromagnetic interference shielding, various electronic and electrical applications, sidewalls, cover strips, wires, sporting goods, outdoor electrical insulators and in a variety of automotive applications (41% of worldwide use) [1], [2], [3], [4]. These applications usually demand a material with good mechanical properties and with a retained elastic nature.…”

Synthesis and Characterization of Methylacrylic Acid and Butyl Acrylate Grafted onto Ethylene-Propylene-Diene Terpolymer

“…EPDM displays many advantageous features, such as low cost, high thermal decomposition temperature, high specific heat, low brittle temperature, resistance to ozone, and favorable mechanical properties. [4] It is widely used in different applications, such as waterproof coatings, rubber contact switches, floor heating, electromagnetic interference shielding, various electronic and electrical applications, sidewalls of tires, wires coating, sporting goods, outdoor electrical insulator, and in a variety of automotive applications space [5][6][7] due to its saturated hydrocarbon backbone with the presence of double bonds in the side chains. [8] However, it cannot be used in some products due to its nonpolar surface.…”

X-Ray Photoelectron Spectroscopy for Characterization of Engineered Elastomer Surfaces

“…In general, it is employed in applications which demand a material with good mechanical properties and with a retained elastic nature [7]. World production of EPDM is estimated to be 41% of all elastomers [8][9][10][11]. Also it has a good resistance to degradation at elevated temperature, sunlight, in oxygen and, in particular, ozone [12].…”