Effect of carbon black and thermal aging on the conduction mechanism of natural and styrene butadiene rubbers

Ghani, A. A.; Eatah, A. I.; Hashem, Ahmed Abdel Rahman; Hassan, H. H.

doi:10.1002/apmc.1985.051290101

Cited by 13 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dispersion state of conductive particles in a host polymer affects the final electrical properties [1][2][3][4][5][6][7][8][9][10][11][12][13]. To understand the conductive network formation, percolation theory has been used to describe the relationship between the electrical conductivity and the filler content [14,15].…”

Section: Introductionmentioning

confidence: 99%

Temperature and time dependence of conductive network formation: Dynamic percolation and percolation time

Zhang

Wang

et al. 2006

Polymer

129

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Temperature and time dependence of conductive network formation: Dynamic percolation and percolation time

Zhang

Wang

et al. 2006

Polymer

129

View full text Add to dashboard Cite

“…Compounding rubber and filler usually rises temperature of compounds due to the friction during mixing and sometimes, the compounds are thermally treated at high temperatures for modifying the physical mechanical properties . Thermal‐treatment influences the performance of rubber compounds intricately while the exact mechanisms remain ambiguous.…”

Section: Introductionmentioning

confidence: 99%

Influence of annealing time on linear rheology and morphology of silica filled polyisoprene rubber and ethylene‐propylene rubber

Xie

Song

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Dynamic rheology in combination of fluorescence and molecular weight analysis was carried out to explore annealing‐induced structural evolutions in silica filled polyisoprene rubber (IR) and ethylene‐propylene rubber compounds containing rhodamine B modified silica of 2.5% in volume fraction. The results show that storage modulus of the ethylene‐propylene rubber compounds increases slightly with increasing annealing time while that of the IR compounds exhibits a peaking behavior at mediate silica contents. Fluorescence tests reveal that the silica agglomerates in both compounds while the agglomeration is more significant in the IR ones. Molecular weight analysis shows that IR in the compounds undergoes degradation during the annealing. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46679.

show abstract

“…Therefore, they thought that filler network may be ruptured in part at large elongation, whereas the junction point in chemical network may survive and the chemical network keeps the stress for the most part in large deformation. In addition, according to Ghani et al, the volume resistivities of CB‐filled rubber (natural rubber, SBR and isoprene rubber (IIR)) vulcanizates decreased after heat‐treatment 26. They presumed that the CB network of CB‐filled rubber vulcanizates was thermally ruptured.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, according to Ghani et al, the volume resistivities of CB-filled rubber (natural rubber, SBR and isoprene rubber (IIR)) vulcanizates decreased after heat-treatment. 26 They presumed that the CB network of CB-filled rubber vulcanizates was thermally ruptured. However, it has never been reported to observe the rupture of the CB network directly.…”

Section: Introductionmentioning

confidence: 99%

Thermal destruction of carbon black network structure in natural rubber vulcanizate

Kato¹,

Suda²,

Ikeda³

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

To investigate thermal destruction and rearrangement of the carbon black (CB) network consisting of CB aggregates in rubbery matrix, the proper heat-treatment temperature without thermal decomposition of rubber matrix were examined by using differential scanning calorimetry, dynamic mechanical measurements, and thermal expansion measurements. 383 K was chosen as the heat-treatment temperature under vacuum. The volume resistivity (q v ) of 50 phr CB-filled natural rubber vulcanizate (CB-50) increased rapidly up to a heat-treatment time of 24 h and it decreased by further heat-treatment time, whereas the q v of CB-80 remained almost constant without depending on heating time. Three-dimensional electron microscope (3D-TEM) observations revealed that after the heat-treatment for 75 h, the average lengths of the crosslinked and the branched chains and the crosslinked points density (D cross ) of the CB network decreased, whereas the branched points density (D branch ) increased with decrease of D cross . After the heat-treatment, their fractions (F cross 0 s) of crosslinked chains decreased, whereas their fractions (F branch 0 s) of the branched ones increased. Especially, F branch of CB-50 became larger than that of CB-80, while the decrease of F cross of CB-50 was almost the same as that of CB-80 by the heat-treatment. And, F cross and F branch of the heat-treated CB-50 were the same compositions (F cross and F branch ¼ ca. 0.7 and ca. 0.3, respectively) as those of the heat-treated CB-80. It is suggested that the CB network of CB-80 is more thermal stable than that of CB-50. These results directly indicate that CB network is broken and is rearranged by a heat-treatment.

show abstract

Effect of carbon black and thermal aging on the conduction mechanism of natural and styrene butadiene rubbers

Cited by 13 publications

References 10 publications

Temperature and time dependence of conductive network formation: Dynamic percolation and percolation time

Temperature and time dependence of conductive network formation: Dynamic percolation and percolation time

Influence of annealing time on linear rheology and morphology of silica filled polyisoprene rubber and ethylene‐propylene rubber

Thermal destruction of carbon black network structure in natural rubber vulcanizate

Contact Info

Product

Resources

About