Mechanical properties of cerium oxide-modified vulcanised natural rubber at elevated temperature

Abstract

Cerium oxide (CeO 2 ) was used as the reinforcement filler to improve the mechanical properties of rubbers. Rubber components are often used at high temperature, so the mechanical properties of CeO 2 -modified vulcanised natural rubbers (NR/CeO 2 ) were investigated at elevated temperatures. The tensile properties, stress relaxation and creep recovery response were studied from 30°C to 150°C. NR/CeO 2 demonstrated higher crosslink density and elastic modulus. The degradation of elastic modulus could be alleviated in the NR/CeO 2 at elevated temperatures. Moreover, a remarkable enhancement in stress relaxation resistance and creep resistance was achieved in the NR/CeO 2 at elevated temperatures. The improved stress relaxation resistance and creep resistance were attributed to the enhanced interaction and bonding force of rubber chains caused by CeO 2 filler. CeO 2 was an effective reinforcement filler to improve the mechanical properties of NR at elevated temperatures.

Enhancement of aging resistance ofEPDMrubber by naturalrubber‐g‐N(4‐phenylenediamine) maleimide as a grafted antioxidant

“…Since the polymer experienced viscous flow, full recovery is not reached resulting in permanent deformation as shown in Figure 5. [ 36–38 ] At 25°C, 6PPD and NR‐ g ‐ p PDAM improved the creep behavior of the EPDM vulcanizates. The creep strain of V‐(6PPD) and V‐(NR‐ g ‐ p PDAM) decreased by 9.4% and 11% compared with V‐(blank).…”

“…Since the polymer experienced viscous flow, full recovery is not reached resulting in permanent deformation as shown in Figure 5. [36][37][38] The creep deformation of V-(NR-g-pPDAM) under the same load at 80 C significantly lowered than that of the V-(6PPD) and V-(blank). Whereas, NR-g-pPDAM enhanced the bonding with the EPDM vulcanizate as observed in Scheme 3.…”

Synergistic Effect of Cerium Oxide for Improving the Fire-Retardant, Mechanical and Ultraviolet-Blocking Properties of EVA/Magnesium Hydroxide Composites

“…Furthermore, the mechanism of adding catalysis is complicated and needs further research [ 9 ]. CeO 2 has been also widely used as the reinforcement filler in polishing solution, glass and catalytic converters [ 20 ].…”

Fatigue of vulcanized natural rubber under proportional and non‐proportional loading

“…The accumulation of ratchetting strain can damage the material and reduce the fatigue life. Research shows that the stress amplitude, mean stress, 15 thermal ageing, 16 high‐temperature environment, 17 and filler 18 have essential impacts on the uniaxial ratchet behaviour. The loading mode, 19 axial stress shear strain amplitude, shear strain rate, and its history have important impacts on the multiaxial ratchet behaviour.…”