Investigation of new composite materials based on activated EPDM rubber waste particles by liquid polymers

Abstract

Despite of the variety of existing techniques, there is still a continuous demand in the development of more efficient recycling technologies, for economic and environmental reasons. A new approach for recycling EPDM rubber waste has been recently introduced utilizing a solvent free activation process by addition of liquid polymers (LP). The present study investigates the influence of the content and varying types of activated rubber waste particles (RWP-LP) in new composites. By varying the proportion of RWP-LP in the range from 25 up to 75 v/v % information about optimized compositions of new compounds were obtained. It was found that the ratio and type of RWP-LP induce significant differences in terms of cure characteristics, mechanical properties, crosslink density and morphology. Promising results with high potential application for the production of seal and sealing systems on the industrial scale were obtained by using up to 50 v/v % of RWP-LP with low ethylene amount.

A Novel Approach to Investigating Effect of Sulfur as a Coagent on the Quasi‐Static and Cyclic–Dynamic Fatigue Properties of Peroxide Cured EPDM

“…Compared with other commonly used rubbers such as butadiene rubber and butadiene–styrene rubber, EPDM exhibits excellent resistance to ozone, oxidation, weathering, and heat due to its almost saturated backbone. Thus, EPDM has been extensively used in automotive profiles, such as high temperature‐resistance conveyor belts, brake booster diaphragm, sealing, and hoses .…”

Evaluation of the aging of elastomeric acrylonitrile‐butadiene rubber and ethylene‐propylene‐diene monomer gaskets used to seal plates heat exchanger

“…The tests were performed at 23°C for 96 h, where the rubber samples remained submerged in organic solvents, with solvent renewal every 24 h. The solvents used for NBR and EPDM were acetone and toluene, respectively. After swelling, the masses of the samples were measured and the samples were placed in an oven with forced air circulation for drying at 72°C for 24 h. [ 21‐24 ] These measurements were performed only on unaged samples and those aged for 360 h at 120°C. where V , μ , and V r (Equation 3) correspond, respectively, to the molecular volume of the solvent, the polymer/solvent interaction parameter, and the volumetric fraction of the rubber after submersion. where m 1 , ρ 1 , m 2 , and ρ 2 correspond, respectively, to the dry sample mass, dry sample density, absorbed solvent mass, and solvent density.…”

Weniger Gummiabfälle

“…Nachrichten aus der Chemie| 68 | Januar 2020 | www.gdch.de/nachrichten I m Jahr 2018 wurden weltweit 29,2 Millionen Tonnen Kautschuk verbraucht, davon waren zirka 13,9 Millionen Die Benetzung des Gummimehls mit Naturkautschuklatex 7) oder flüssigem Polymer 8,9) oder die Funktionalisierung 10) der Oberfläche verbessern die Phasenanbindung und machen so die Verbundwerkstoffe fester. 10,11)…”