Abstract
In this research, the effect of calcium oxide (CaO) nanocrystalline particles filled ethylene propylene diene monomer (EPDM) rubber composites is investigated, at different weight percentages (1.0, 2.0, 4.0, and 8 wt%) of CaO nanocrystalline particles using two methods of mixing. In one case conventional mixing on twin roll-mill was used, in the other case ultrasonic mixing as a pre-mixing was applied. CaO particles are synthesized by the precipitation method. The average crystallite size of CaO is 100 ± 20 nm. Adding CaO nanocrystalline particles increases the thermal stability of EPDM and the glass transition temperature. The hardness of EPDM rubber gradually increases with increasing the amount of CaO particles, the maximum hardness 64.2 observed in 8 wt% of CaO particles for both cases almost 26% higher than neat EPDM. Tensile strength decreases, while the maximum % modulus of the ultrasonic mixed sample was 1.48 MPa which is 24% higher than EPDM.
Highlights
In materials science, one of the most important phenomena is the reinforcement of rubber by fine, rigid entities, dispersed particulate, or phase-separated domains
Sunil et al [28] studied thermal properties of calcium oxide (CaO) nanofluids, by using CaO nanoparticles as a bio-lubricant, an additive is synthesized from chicken eggshells and dispersed rice bran oil as a base fluid ultrasonicated for 20 min; at 20 kHz using probe sonicator as a mixer, the result revealed that thermal stability of rice bran oil increase by 18.2% and 25% due to the addition of 0.25 wt% and 0.50 wt% of CaO nanofluids, respectively, but it does not affect rice bran oil oxidation behavior
Mechanical, thermal, crystallographic, and electrical properties of neat ethylene propylene diene monomer (EPDM) and its nanocomposites are discussed
Summary
One of the most important phenomena is the reinforcement of rubber by fine, rigid entities, dispersed particulate, or phase-separated domains. Nano ZnO particles enhance better dynamic heat build-up mechanical properties by in situ modification.It can be found a few papers in the literature about the CaO-EPDM rubber composite. EPDM rubber and different wt% of CaO particles samples were to characterize the material under the tensile loading by using Instron 5566 universal testing machine.
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