Electrical Properties of Irradiated Rubber‐Clay Composites Based on NBR and SBR

Radwan, R.M.; Mohamed, Reham A.; Abdelaziz, M.

doi:10.1002/adv.21263

Cited by 4 publications

(6 citation statements)

References 53 publications

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“…By increasing the SBR content, the interfacial area increased up to a certain extent, due to the bulky structure of SBR. On then may point out that a thermodynamic stable system is formed when Δ < 0 [32]. It was found that the in negative values are obtained as the concentration of NBR increases in blends.…”

Section: F Network Characteristics and Physico-chemical Parameters Of Vulcanized Sbr/nbr Blendsmentioning

confidence: 95%

Compatibilization of Vulcanized SBR/NBR Blends using Cis-Polybutadiene Rubber: Influence of Blend Ratio on Elastomer Properties

Doma¹,

Kamoun²,

Abboudy³

et al. 2019

EJERS

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Blends composed of styrene butadiene rubber (SBR) and acrylonitrile-butadiene rubber (NBR) were fabricated by melt blending technique using two-roll mill blend machine. Cis- polybutadiene rubber (CBR) was used as a compatibilizer for enhancing the homogeneity between SBR and NBR phases in blends. Although, no previous reports were found to discuss improving electrical properties of vulcanized SBR/NBR blends using unfilled rubber system (i.e. no fillers incorporated). Raman spectra and SEM images indicate that a significant compatibility within the rubber matrix is observed, due to using CBR compatibilizer. The effect of SBR/NBR blend ratio on curing characteristics, physico-mechanical properties, and physicochemical properties (e.g. network characteristics and thermodynamic parameters) were studied. SBR/NBR blend showed comparatively better mechanical properties, compared to each other individually rubber system. Curing parameters e.g. Mooney viscosity and hardness were increased, while a reduction in cure time and specific gravity was observed with increasing SBR ratio in blends. Results revealed that increasing SBR resulted in an enhancement of the tensile strength, modulus at 300 % and elongation at break up to 40 phr, and then gradually decreased. The TGA results indicated that SBR/NBR blends were thermally decomposed at a temperature range of 340-520°C. The notable decrease of DC conductivity (σdc) of vulcanized blends is owing to the decrease of NBR, which is a polar portion and is responsible for increasing the conductivity of vulcanized blends. This proved that the targeted industrial applications for vulcanized blends are entirely depending upon SBR/NBR blend in elastomers matrix.

show abstract

Section: F Network Characteristics and Physico-chemical Parameters Of Vulcanized Sbr/nbr Blendsmentioning

confidence: 95%

Compatibilization of Vulcanized SBR/NBR Blends using Cis-Polybutadiene Rubber: Influence of Blend Ratio on Elastomer Properties

Doma¹,

Kamoun²,

Abboudy³

et al. 2019

EJERS

View full text Add to dashboard Cite

show abstract

“…By increasing the SBR content, the interfacial area increased up to a certain extent, due to the bulky structure of SBR. On then may point out that a thermodynamic stable system is formed when Δ𝐺 < 0 [32]. It was found that the 𝛥𝐺 in negative values are obtained as the concentration of NBR increases in blends.…”

Section: F Network Characteristics and Physico-chemical Parameters Of...mentioning

confidence: 96%

“…Thus, the explanation of DC conductivity of blend sheets is mainly based on the polarization of tested sheet composition. Furthermore, presence of the electro-negative nitrile groups in NBR which corresponded to interaction and conductivity occurred [28], [32]. As seen, it is clearly detected that the electrical conductivity of the SBR/NBR blends increase with increasing NBR content.…”

Section: G DC Conductivity Of Vulcanized Sbr/nbr Blendsmentioning

confidence: 99%

Compatibilization of Vulcanized SBR/NBR Blends using Cis-Polybutadiene Rubber: Influence of Blend Ratio on Elastomer Properties

Doma

Kamoun

Abboudy

et al. 2019

EJENG

View full text Add to dashboard Cite

Blends composed of styrene butadiene rubber (SBR) and acrylonitrile-butadiene rubber (NBR) were fabricated by melt blending technique using two-roll mill blend machine. Cis- polybutadiene rubber (CBR) was used as a compatibilizer for enhancing the homogeneity between SBR and NBR phases in blends. Although, no previous reports were found to discuss improving electrical properties of vulcanized SBR/NBR blends using unfilled rubber system (i.e. no fillers incorporated). Raman spectra and SEM images indicate that a significant compatibility within the rubber matrix is observed, due to using CBR compatibilizer. The effect of SBR/NBR blend ratio on curing characteristics, physico-mechanical properties, and physicochemical properties (e.g. network characteristics and thermodynamic parameters) were studied. SBR/NBR blend showed comparatively better mechanical properties, compared to each other individually rubber system. Curing parameters e.g. Mooney viscosity and hardness were increased, while a reduction in cure time and specific gravity was observed with increasing SBR ratio in blends. Results revealed that increasing SBR resulted in an enhancement of the tensile strength, modulus at 300 % and elongation at break up to 40 phr, and then gradually decreased. The TGA results indicated that SBR/NBR blends were thermally decomposed at a temperature range of 340-520°C. The notable decrease of DC conductivity (?dc) of vulcanized blends is owing to the decrease of NBR, which is a polar portion and is responsible for increasing the conductivity of vulcanized blends. This proved that the targeted industrial applications for vulcanized blends are entirely depending upon SBR/NBR blend in elastomers matrix.

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“…In particular, rubber/clay nanocomposites have attracted great interest in industrial and scientific applications [5,6] due to the remarkable improvement in mechanical properties [7] , electrical and thermal properties [8] , gas permeability [9] , and flame resistance [10] . It is generally accepted that a varying degree of intercalation/exfoliation leads to different reinforcing effects for the rubber/clay nanocomposites [11,12] .…”

Section: Introductionmentioning

confidence: 99%

Effect of silane coupling agent on the mechanical properties of nitrile butadiene rubber (NBR)/organophilic montmorillonite (OMMT) nanocomposites

Zhang¹,

Zhao

Huang

et al. 2014

Science and Engineering of Composite Materials

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The effect of coupling agents on the mechanical properties of nitrile butadiene rubber (NBR)/organophilic montmorillonite (OMMT) clay nanocomposites was studied using three different types of silane coupling agents, which were γ -(aminopropyl)triethoxysilane, γ -(mercaptopropyl) triethoxy silane, and bis-[( γ -triethoxy silane)proply] tetrasulfur. The NBR/OMMT nanocomposites were prepared via the melt compounding with OMMT clay. The effect of silane coupling agents on the dispersion of OMMT in the polymer matrix was studied by X-ray diffraction. Dynamic mechanical analysis was employed to investigate the mechanical properties change induced by the silane coupling agents. The results suggest improved mechanical properties for the nanocomposites with coupling agents of γ -(mercaptopropyl) triethoxy silane and bis-[( γ -triethoxy silane)proply] tetrasulfur, whereas reduced mechanical properties were observed for nanocomposites with γ -(aminopropyl)triethoxysilane.

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Electrical Properties of Irradiated Rubber‐Clay Composites Based on NBR and SBR

Cited by 4 publications

References 53 publications

Compatibilization of Vulcanized SBR/NBR Blends using Cis-Polybutadiene Rubber: Influence of Blend Ratio on Elastomer Properties

Compatibilization of Vulcanized SBR/NBR Blends using Cis-Polybutadiene Rubber: Influence of Blend Ratio on Elastomer Properties

Compatibilization of Vulcanized SBR/NBR Blends using Cis-Polybutadiene Rubber: Influence of Blend Ratio on Elastomer Properties

Effect of silane coupling agent on the mechanical properties of nitrile butadiene rubber (NBR)/organophilic montmorillonite (OMMT) nanocomposites

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