Prediction of Mechanical and Functional Features of Aged Rubber Composites Based on BR/SBR; Structure-Properties Correlation

Motiee, Fereshteh; Bigdeli, Tania

doi:10.1590/1980-5373-mr-2019-0226

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…The aging phenomenon is an irreversible process, which can significantly change the physical, mechanical and rheological properties of rubber composites. Changes of the interfacial adhesion between reinforcement and rubber thus cause rubber composite hardening, leading to the embrittlement and reduced lifespan of rubber composites [14].…”

Section: Introductionmentioning

confidence: 99%

Thermal Aging Rheological Behavior of Magnetorheological Elastomers Based on Silicone Rubber

Aziz

Mazlan

Ubaidillah

et al. 2020

IJMS

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Engineering rubber composites have been widely used as main components in many fields including vehicle engineering and biomedical applications. However, when a rubber composite surface area is exposed to heat or sunlight and over a long-term accelerated exposure and lifecycle of test, the rubber becomes hard, thus influencing the mechanical and rheological behavior of the materials. Therefore, in this study, the deterioration of rheological characteristics particularly the phase shift angle (δ) of silicone rubber (SR) based magnetorheological elastomer (MRE) is investigated under the effect of thermal aging. SR-MRE with 60 wt% of CIPs is fabricated and subjected to a continuous temperature of 100 °C for 72 h. The characterization of SR-MRE before and after thermal aging related to hardness, micrograph, and rheological properties are characterized using low vacuum scanning electron microscopy (LV-SEM) and a rheometer, respectively. The results demonstrated that the morphological analysis has a rough surface and more voids occurred after the thermal aging. The hardness and the weight of the SR-MRE before and after thermal aging were slightly different. Nonetheless, the thermo-rheological results showed that the stress–strain behavior have changed the phase-shift angle (δ) of SR-MRE particularly at a high strain. Moreover, the complex mechanism of SR-MRE before and after thermal aging can be observed through the changes of the ‘in-rubber structure’ under rheological properties. Finally, the relationship between the phase-shift angle (δ) and the in-rubber structure due to thermal aging are discussed thoroughly which led to a better understanding of the thermo-rheological behavior of SR-MRE.

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Section: Introductionmentioning

confidence: 99%

Thermal Aging Rheological Behavior of Magnetorheological Elastomers Based on Silicone Rubber

Aziz

Mazlan

Ubaidillah

et al. 2020

IJMS

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“…The property changes were reduced with the addition of ADC. Lower values indicate the higher thermal stability of rubber vulcanisate [23,24] . Increasing the amount of ADC reduced the cell wall thickness due to the increased porosity.…”

Section: Compression-deflection Before and After Thermal Ageing And F...mentioning

confidence: 99%

Classification of natural rubber foam grades by optimising the azodicarbonamide content

2022

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This study aimed to focus on classifying rubber foam grades according to ASTM D1056. The natural rubber foams were prepared by varying the Azodicarbonamide (ADC) content from 2 -10 phr. The results were evaluated on their physical and mechanical properties. The relative foam density of the foams decreased, and the expansion ratio increased with the addition of ADC. This was due to the increase in the gas phase raised by ADC. In addition, adding ADC also decreased hardness and compression-deflection of the foams, whereby the values obtained were higher after oven aging due to the radical recombination caused by chain breaking. According to ASTM D1056, the compression-deflection values of the foams were 2A2 and 2A3 grades, where the ADC content at 6 -10 phr met the basic properties required by the same standard. Furthermore, the ADC content at 6 phr is strongly suggested when considering the foam morphology.

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Prediction of Thermodynamic and Viscoelastic Properties of Rubber Using Molecular Simulations

Pahari¹,

Ghosh²,

Mukhopadhyay³

2023

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">Rubber is one of the most versatile materials and finds numerous applications in diverse areas. The application of rubber is mostly determined by its physico-mechanical and viscoelastic properties. Rubber properties play an essential role in performing its functional requirement, which is crucial for designing a good rubber product. Therefore, the estimation and prediction of the properties of rubber and rubber composites are central to the material developers. However, many factors, such as temperature, environmental effects, and rubber formulation can influence rubber properties and make it highly non-linear. Computer simulation plays a vital role in our understanding of complex dynamics in rubber materials and provide structure-property relationship at the nanoscopic and microscopic level. An understanding of this relationship can reduce the expensive trial experiments and provide a benchmark for novel material design. Additionally, simulations at atomic and molecular levels provide the mechanism of action and the underlying physics which finally helps in designing of new materials. In the present work, all atomistic Molecular Dynamics (MD) simulation technique is utilized to predict various thermodynamic and viscoelastic properties of raw rubbers. The effect of key structural factors, that govern the properties of rubber at the molecular level, is examined using MD. In this work, we have developed the classical atomistic models for several raw rubbers and implemented methodologies for calculating their properties from MD simulations. The predicted properties using our model and methodologies are in close agreement with the experimental and available literature values. Our results establish that MD simulations are an effective tool to predict quantitatively thermodynamic and viscoelastic properties of rubber. Eventually, the same technique can be used to predict properties for crosslinked rubber, rubber composites, blends, and silica/carbon black reinforced rubbers and thus, designing a novel rubber material.</div></div>

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Prediction of Mechanical and Functional Features of Aged Rubber Composites Based on BR/SBR; Structure-Properties Correlation

Cited by 3 publications

References 28 publications

Thermal Aging Rheological Behavior of Magnetorheological Elastomers Based on Silicone Rubber

Thermal Aging Rheological Behavior of Magnetorheological Elastomers Based on Silicone Rubber

Classification of natural rubber foam grades by optimising the azodicarbonamide content

Prediction of Thermodynamic and Viscoelastic Properties of Rubber Using Molecular Simulations

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