Effects of thermal aging on uniaxial ratcheting behavior of vulcanised natural rubber

Zhang, Zhe; Sun, Jing; Lai, Yaling; Wang, Yanping; Liu, Xiaoyu; Shi, Shouwen; Chen, Xu

doi:10.1016/j.polymertesting.2018.06.030

Cited by 27 publications

(10 citation statements)

References 32 publications

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“…In this research, nitrile butadiene rubber latex (NBR)/graphene oxide (GO) membrane was fabricated to overcome the tradeoff effect. NBR latex was chosen as the membrane material due to its superior chemical resistance and structural integrity [20]. The mechanical strength and chemical resistance of NBR could be tailored through the three-dimensional sulfur cross-linking network.…”

Section: Introductionmentioning

confidence: 99%

Latex-Based Membrane for Oily Wastewater Filtration: Study on the Sulfur Concentration Effect

et al. 2021

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Nitrile butadiene rubber (NBR) latex/graphene oxide (GO) membranes were fabricated through a latex compounding and curing method which is a relatively new method to produce membranes for wastewater treatment. Hence, the steps in the production of the membrane through this new approach need to be evaluated to optimize the performance of the membrane. In this paper, the effect of sulfur loading in the range of 0.5 to 1.5 parts per hundred rubber (phr) on the morphology, crosslink density, tensile properties, permeation flux and oil rejection rate performance of NBR/GO membranes was studied. The sulfur loading was found to influence the surface morphology and integrity of the membrane which in turn affects the performance of the membrane in terms of strength, water flux and rejection rate of oil. Inaccurate sulfur loading produced a membrane with micro cracks, low surface area for filtration and could not withstand the filtration pressure. In this research work, the membrane with 1.0 phr sulfur provides the highest water flux value and oil rejection rate of 834.1 L/m2·hr and 92.23%, respectively. Surface morphology of 1.0 phr sulfur-loaded membrane revealed the formation of continuous membrane with high structural integrity and with wrinkles and folded structure. Furthermore, micro cracks and a less effective surface area for filtration were observed for membranes with 0.5 and 1.5 phr sulfur loading.

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Section: Introductionmentioning

confidence: 99%

Latex-Based Membrane for Oily Wastewater Filtration: Study on the Sulfur Concentration Effect

et al. 2021

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“…The aging of rubber may results from many factors such as light, heat, mechanical force, oxygen, ozone, etc 1‐3 . As rubber was affected by heat and air for a long time during its use, thermal oxidative aging of rubber was the most common reason of rubber aging 4,5 . The thermal oxidative aging may result in decreased elasticity, hardening, and unstable mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Surface‐modified mesoporous silica nanorods for the highly aging resistance rubber through controlled release of antioxidant

Luo

Wang

Cui

et al. 2021

Polymers for Advanced Techs

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The migration and blooming of antioxidant molecules in the field of anti‐aging rubber is a challenge, where developing novel nanocarriers loaded with antioxidant molecules can solve the above problem. In this article, the surface thiol functionalized mesoporous silica nanorods loaded with antioxidant N‐(1,3‐dimethyl)butyl‐N′‐phenyl‐p‐phenylenediamine (MSN‐SH‐4020) was synthesized to avoid the blooming of antioxidants and then to improve the anti‐aging performance of styrene‐butadiene rubber (SBR). The migration of antioxidant molecules could be limited by encapsulating antioxidant in the pore of mesoporous silica nanorods, and the contend of antioxidant in the SBR reaches up to 1.33 wt%. The sustained release of antioxidant molecules from the pore increases the effective time of action of the antioxidant. After 168 hours of thermal oxidative aging test at 100°C, styrene‐butadiene rubber with 10 wt % surface thiol functionalized mesoporous silica nanorods loaded with 4020 (MSN‐SH‐4020) shows preservation of mechanical properties without blooming. This approach is highly perspective in many applications, such as long‐life sealing rubber and conveyor belts.

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“…The compression set of different rubber compounds exhibiting reduced values due to long-term ageing was studied in [11][12]. The thermal effect on the behavior of natural rubber-based compounds subjected to nonzero-mean cyclic strain (ratcheting) in tension has been evaluated [13]. To estimate the depth of the oxidized layer based on diffusion and chemical reactions theory, Azura, et al [14] studied the effect of thermal-oxidative ageing at different distances from the surface using tensile strips.…”

Section: Introductionmentioning

confidence: 99%

“…Based on swelling measurements, wide angle X-ray scattering (WAXS), and differential scanning calorimetry (DSC), Grasland, et al [16] found that crosslinking reactions take place during thermo-oxidative ageing due to residual sulfur and that longer exposure times create highly crosslinked domains, owing to sulfur grafted onto the polymer chains. Changes in the crosslink density and thermal ageing resistance of natural rubber vulcanizates are dependent on the reinforcing [17] and curing systems [18][19][20] used in the formulation of the compound and also on the ageing time and temperature [13].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Thermal Ageing on the Mechanical Properties of Natural Rubber-based Compounds Used for Rubber Bearings

Guzmán

Vásquez

Moreno

2021

J. Eng. Technol. Sci.

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Molecular changes due to high temperatures, sunlight, and oxygen, deteriorate the physical properties of rubber compounds, yielding additional crosslinks and molecular chain breakdown. Since oxidative degradation is the most important factor that determines the durability of rubber components, this study evaluated the mechanical behavior of rubber compounds exposed to accelerated thermal ageing. Therefore, three carbon black-reinforced natural rubber-based compounds typically used for rubber bearings were exposed to thermal oxidation and their mechanical properties under typical loading states were assessed through standardized tests. Significant differences were found due to thermal ageing in the compressive modulus, compression set, and creep compliance in compression, exhibiting a stiffening effect caused by additional crosslinks. However, no significant differences were observed in hardness, which is a superficial measurement and a typical test in the rubber industry to characterize rubber compounds. Therefore, the assessment of ageing in rubber bearings should not be limited to a hardness test, which is required in design standards but also addresses compressive, cyclic, and transient tests. The results obtained in this study can be considered in the design process of rubber bearings by limiting the allowable compressive stress and creep deflection due to ageing effects.

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Effects of thermal aging on uniaxial ratcheting behavior of vulcanised natural rubber

Cited by 27 publications

References 32 publications

Latex-Based Membrane for Oily Wastewater Filtration: Study on the Sulfur Concentration Effect

Latex-Based Membrane for Oily Wastewater Filtration: Study on the Sulfur Concentration Effect

Surface‐modified mesoporous silica nanorods for the highly aging resistance rubber through controlled release of antioxidant

The Effect of Thermal Ageing on the Mechanical Properties of Natural Rubber-based Compounds Used for Rubber Bearings

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