Differential dynamic viscoelastic behavior of carbon black-filled rubber subjected to large shear strain histories.

Abstract The steady shear viscosities of four model rubber/carbon-black compounds are measured with a modified Weissenberg Rheometer in a range of moderate shear rates. Yield stresses and low-shear viscosities are determined from creep-flow experiments. Yield stresses are found to increase strongly with filler content while their dependence on temperature can be described by an Arrhenius-type function. Flow curves are reduced to master curves by means of the time-temperature superposition principle. The shift factors are well approximated by the WLF-relation. The contribution of the “secondary” carbon-black network to the viscoelastic behavior requires additional vertical shifting for the filled compounds. Viscosities are found to be in very good agreement with the Herschel-Bulkley model when using the experimentally determined yield values.

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Development of a new combined numerical/experimental approach for the modeling of the nonlinear hyper-viscoelastic behavior of highly carbon black filled rubber compound

Polymer Testing ◽

10.1016/j.polymertesting.2018.06.035 ◽

2018 ◽

Vol 70 ◽

pp. 135-143 ◽

Cited By ~ 7

Author(s):

Mir Hamid Reza Ghoreishy ◽

Foroud Abbassi Sourki

Keyword(s):

Carbon Black ◽

Experimental Approach ◽

Viscoelastic Behavior ◽

Rubber Compound ◽

Filled Rubber

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DISCUSSION ABOUT THERMAL CONDUCTIVITY OF CARBON BLACK FILLED RUBBER

Special Topics & Reviews in Porous Media An International Journal ◽

10.1615/.2015012293 ◽

2015 ◽

Vol 6 (2) ◽

pp. 159-172 ◽

Cited By ~ 2

Author(s):

Junping Song ◽

Lianxiang Ma ◽

Yan He ◽

Wei Li ◽

Shi-Chune Yao

Keyword(s):

Thermal Conductivity ◽

Carbon Black ◽

Filled Rubber

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Studies on dynamic creep of carbon black-filled rubber vulcanizates.

NIPPON GOMU KYOKAISHI ◽

10.2324/gomu.62.448 ◽

1989 ◽

Vol 62 (7) ◽

pp. 448-458

Author(s):

Kunihiko FUJIMOTO ◽

Tatsuhiko HATAKEYAMA

Keyword(s):

Carbon Black ◽

Filled Rubber ◽

Dynamic Creep

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STUDY ON NANOMORPHOLOGY OF HIGH-STRUCTURE CARBON BLACK AND ITS BOUND RUBBER BY AFM

Surface Review and Letters ◽

10.1142/s0218625x12500035 ◽

2012 ◽

Vol 19 (01) ◽

pp. 1250003

Author(s):

JIAN CHEN ◽

YONGZHONG JIN ◽

JINGYU ZHANG ◽

YAFENG WU ◽

CHUNCAI MENG

Keyword(s):

Carbon Black ◽

Cluster Structure ◽

Chemical Activity ◽

Styrene Butadiene Rubber ◽

Butadiene Rubber ◽

Atomic Force ◽

Filled Rubber ◽

Bound Rubber ◽

Styrene Butadiene ◽

High Structure

Bound rubber in carbon black (CB) filled rubber (natural rubber (NR) and styrene–butadiene rubber (SBS)) was prepared by the solvent method. The nanomorphology of CB and rubber/CB soluble rubber was observed by atomic force microscope. The results show that high-structure CB DZ13 has a "grape cluster" structure which consists of many original particles with the grain size of about 30–50 nm. Graphitizing process of CB decreases the amount of bound rubber. The NR/DZ13 soluble rubber with island–rim structure has been obtained, where the islands are DZ13 particles and the rims around the islands are occupied by NR film. But when the graphitized DZ13 particles were used as fillers of rubber, we have only observed that some graphitized DZ13 particles were deposited on the surface of the globular-like NR molecular chains, instead of the spreading of NR molecular chains along the surface of DZ13 particles, indicating that graphitized DZ13 has lower chemical activity than ungraphitized DZ13. Especially, we have already observed an interesting unusual bound rubber phenomenon, the blocked "bracelet" structure with the diameter of about 600 nm in which CB particles were blocked in ring-shaped SBS monomer.

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States of Carbon Black Dispersion and Extensibility of Rubbers

Rubber Chemistry and Technology ◽

10.5254/1.3538315 ◽

1993 ◽

Vol 66 (2) ◽

pp. 317-328 ◽

Cited By ~ 5

Author(s):

Asahiro Ahagon

Keyword(s):

Carbon Black ◽

Tensile Property ◽

Crosslink Density ◽

Hydrodynamic Effect ◽

Property Variation ◽

Agglomerate Size ◽

Filled Rubber ◽

Two Temperatures ◽

Confined Polymer ◽

Carbon Black Dispersion

Abstract Analysis is made for the origin of the mixing-induced tensile property variation of a filled rubber. Attention is paid to the hydrodynamic effect f(ϕe) of the filler, defined here as the factor to adjust the deviation of 100% modulus from the theory of rubber elasticity. For the rubbers mixed under variety of conditions, the f(ϕe)'s are calculated from the observed values of the modulus, at 25°C and 100°C, and the crosslink density. The variation of the f(ϕe) is considered to be governed by the mobility of the polymer confined in agglomerates of the filler. The mobility variation due to mixing seems to be mainly influenced by agglomerate size at 25°C, and by agglomerate size and chemical constraints at 100°C. Therefore, the f(ϕe)'s at the two temperatures are suggested to be useful measures of the state of carbon-black micro-dispersion. The extensibility of the rubbers is closely related f(ϕe). This indicates that the failure property is also governed by the mobility of the confined polymer.

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