Thermal-oxidative aging behaviors of shape memory nitrile butadiene rubber composite with dual crosslinking networks

Zhang, Jihua; Wang, Chao; Chen, Fengbo; Zao, Weitao; Feng, Huadong; Zhao, Yunfeng

doi:10.1016/j.polymdegradstab.2020.109280

Cited by 13 publications

(10 citation statements)

References 38 publications

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“…We first fabricated (6,6) CNTs with a length of 22.14 Å. The geometric centers of the CNTs were centrally aligned in the simulation box.…”

Section: Modelingmentioning

confidence: 99%

“…[1][2][3] Therefore, it is important for extending the service life of rubber, improving the efficiency of oil production, and slowing the thermal-oxidativeaging damage to rubber. [4][5][6] The thermal-oxidative aging and tribological properties of rubber materials have been extensively studied. Han et al [7] investigated the effect of crosslinking density on the mechanical properties of NBR composites before and after thermal-oxidative aging.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal‐oxidative aging and tribological properties of carbon nanotube/nitrile butadiene rubber composites with varying acrylonitrile content: Molecular dynamics simulations

Qian

Zhao

et al. 2023

Polymer Engineering & Sci

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Nitrile butadiene rubber (NBR), a common material used in the stator rubber of screw pumps, usually undergoes severe thermal‐oxidative aging and wear at various temperatures and pressures. In this study, 1,2‐dihydro‐2,2,4‐trimethylquinoline (antioxidant RD) and carbon nanotubes (CNTs) were introduced into NBR to improve its thermal‐oxidative aging performance and reduce its wear. The thermal‐oxidative aging and mechanical and tribological properties of NBR composites with acrylonitrile (ACN) contents of 28%, 33%, and 41% were investigated via molecular dynamics simulations, and the interaction mechanisms of four composites: RD/N28, CNT/RD/N28, CNT/RD/N33, and CNT/RD/N41, were investigated at the atomic level. A three‐layer model (Fe–Composites–Fe) was developed to simulate the wear process of the composites. CNT/RD/N41 exhibited better thermal‐oxidative aging and tribological properties than those exhibited by CNT/RD/N28 and CNT/RD/N33. This was attributed to an increase in the polar–polar interactions of the nitrile (CN) groups with an increasing ACN content. During friction, a larger frictional force existed between the CNT/RD/N41 molecules, which effectively maintained the stability of the matrix. This study provides a scientific reference for the preparation of high‐performance NBR at the microscopic scale, which may extend the service life of screw pumps.

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“…We first fabricated (6,6) CNTs with a length of 22.14 Å. The geometric centers of the CNTs were centrally aligned in the simulation box.…”

Section: Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal‐oxidative aging and tribological properties of carbon nanotube/nitrile butadiene rubber composites with varying acrylonitrile content: Molecular dynamics simulations

Qian

Zhao

et al. 2023

Polymer Engineering & Sci

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“…Generally, the hysteresis is caused by friction between the rubber matrix and filler particles 36 . In addition, with increasing of aging time, more ruptured chains and low-molecular-weight products are generated 37 , which results in obvious hysteresis responses. It can be seen that the hysteresis loss of the specimen aged at 120 °C is more remarkable, which may be related to stronger internal friction and impact between CB fillers and the molecular chains.…”

Section: Prediction Of Hysteresis Lossmentioning

confidence: 99%

Effect of thermo-oxidative aging on the Payne effect and hysteresis loss of carbon-black filled rubber vulcanizates

2022

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In the tire industry, the Payne effect and hysteresis loss of carbon-black (CB) filled rubber vulcanizates are the most concerning issues. CB filled rubber vulcanizates are susceptible to thermo-oxidative aging in the applications. In this paper, the effects of thermo-oxidative aging are investigated from experimental and theoretical aspects. The specimens are subjected to thermo-oxidative aging at 80, 100 and 120 °C for various periods of time ranging from 1 to 6 days and then the dynamic mechanical tests are conducted. The results show that both the storage modulus and the loss modulus increase with increasing aging time. The hysteresis loss of the material shows an increasing tendency with the increase of dynamic strain amplitude, aging time and aging temperature. The Kraus model is used to describe the Payne effect and a viscoelastic model consisting of dynamic strain amplitude and loss modulus is used to calculate the energy dissipation.

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“…This effect can be exhibited by both virgin polymers and their composites [ 18 , 19 , 20 ]. Elastomers, such as nitrile butadiene rubber, natural rubber, epoxidized natural rubber, silicon rubber, and polyurethane, etc., are widely studied because of their shape memory effect [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. Various fillers, such as silica, graphene oxide, carbon nanotubes, and nano clay, etc., improve the shape recovery, mechanical strength, and elastic modulus, as well as reduce recovery time.…”

Section: An Overview Of Shape Memory Effectmentioning

confidence: 99%

Shape Memory Materials from Rubbers

Thomas¹,

Jibin

Kaliyathan

et al. 2021

Materials

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Smart materials are much discussed in the current research scenario. The shape memory effect is one of the most fascinating occurrences in smart materials, both in terms of the phenomenon and its applications. Many metal alloys and polymers exhibit the shape memory effect (SME). Shape memory properties of elastomers, such as rubbers, polyurethanes, and other elastomers, are discussed in depth in this paper. The theory, factors impacting, and key uses of SME elastomers are all covered in this article. SME has been observed in a variety of elastomers and composites. Shape fixity and recovery rate are normally analysed through thermomechanical cycle studies to understand the effectiveness of SMEs. Polymer properties such as chain length, and the inclusion of fillers, such as clays, nanoparticles, and second phase polymers, will have a direct influence on the shape memory effect. The article discusses these aspects in a simple and concise manner.

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Thermal-oxidative aging behaviors of shape memory nitrile butadiene rubber composite with dual crosslinking networks

Cited by 13 publications

References 38 publications

Thermal‐oxidative aging and tribological properties of carbon nanotube/nitrile butadiene rubber composites with varying acrylonitrile content: Molecular dynamics simulations

Thermal‐oxidative aging and tribological properties of carbon nanotube/nitrile butadiene rubber composites with varying acrylonitrile content: Molecular dynamics simulations

Effect of thermo-oxidative aging on the Payne effect and hysteresis loss of carbon-black filled rubber vulcanizates

Shape Memory Materials from Rubbers

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