Viscoelastic properties of butadiene-styrene block copolymers

Vinogradov, G. V.; Dreval, V. E.; Malkin, A. Ya.; Yanovsky, Yuri G.; Barancheeva, V. V.; Borisenkova, E. K.; Zabugina, M.P.; Plotnikova, E. P.; Sabsai, O. Yu.

doi:10.1007/bf01535062

Cited by 33 publications

(14 citation statements)

References 9 publications

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“…The carbon black elementary particles had a characteristic dimension of 30 nm. For these compounds, a percolated particle network was evidenced from electrical conductivity measurements for carbon black volume fractions equal or greater than 0.15 (in agreement with earlier works5). The percolation threshold, corresponding to the volume fraction at which the particles form a continuous network in the polymer matrix, characterizes the onset of physical gelation.…”

Section: Methodssupporting

confidence: 90%

Linear and nonlinear viscoelasticity of carbon black filled elastomers: Use of complementary rheological characterizations

Barrès

Mongruel

Cartault

et al. 2002

J of Applied Polymer Sci

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ABSTRACT:The viscoelastic properties of filled elastomers (uncured styrene-butadiene rubber filled with carbon black) were investigated with two shear rheometers specially designed for the characterization of complex polymer systems. A torsional strain-controlled rheometer [i.e., a rubber process analyzer (RPA)] was used in dynamic and relaxation modes for measuring the storage and loss moduli and the relaxation modulus. A stress-controlled sliding cylinder rheometer (SCR) was operated for the measurement of the creep compliance. Both devices could be operated on a large scale of imposed strains or stresses ranging from the linear viscoelastic regime to the nonlinear viscoelastic regime, and they were complementary in supporting the original viscoelastic behavior of filled elastomers for a wide experimental time range. Moreover, when the measuring ranges of the two apparatus overlapped, a cross-check of the material functions obtained with the RPA or SCR could be successfully carried out. This validation of the data was performed not only in the linear domain of viscoelasticity, with the classical approach of a generalized Maxwell model, but also in the nonlinear domain, with a viscoelastic integral model of type K-BKZ.

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Section: Methodssupporting

confidence: 90%

Linear and nonlinear viscoelasticity of carbon black filled elastomers: Use of complementary rheological characterizations

Barrès

Mongruel

Cartault

et al. 2002

J of Applied Polymer Sci

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show abstract

“…At higher shear rates (higher shear stresses) the viscosity was much more reproducible and in agreement with capillary data. This observation is in accord with the work of Vinogradov et al 24 who, for the same S-B-S sample investigated by the IUPAC group, report that the material in the region of low shear stresses exhibits sharply pronounced thioxotrophy. Vinogradov et al Vinogradov et ai.…”

Section: Influence Of Shear Ratesupporting

confidence: 91%

Melt Flow Properties of Block Copolymers

Lyngaae-Jørgensen

1985

Processing, Structure and Properties of Block Copolymers

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“…The rheological measurements were done using capillary microviscosimeter MV-2 13 and using rheometer PIRSP-03 14 at harmonic small amplitude vibrations (the region of frequencies from 10 Ϫ13 to 10 s Ϫ1 ). The mechanical characteristics of solid extrudates done using the MV-2 device were measured by extension using dynamometer.…”

Section: Methodsmentioning

confidence: 99%

Effect of a filler on the rheological and mechanical properties of the liquid-crystalline polyester-poly(methyl methacrylate) blends

Shumsky

Getmanchuk

Lipatov

2000

J. Appl. Polym. Sci.

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ABSTRACT:The rheological and mechanical properties of the blends of liquid-crystalline polyester (LCP) and poly(methyl methacrylate) (PMMA) filled with aluminum borate whiskers have been studied. It was established the combined action of reinforcing LCP and filler onto the property of PMMA matrix leads to marked reinforcing of PMMA. At 10% of filler and 30% of LCP, the tensile strength of PMMA increases by 30% and elasticity modulus by 110%, the processability being no worse. The viscosity of the blend PMMA ϩ 30% LCP ϩ 10% filler practically is the same as the PMMA melt viscosity at 220°C. With increasing concentration of LCP up to 30%, the filler effect in binary matrix becomes more essential. The possible reason is the preferential adsorption of LCP at the filler interface (surface segregation) and additional ordering of LCP near the surface, possible, due to additional stretching of nematic phase in the convergent flow zone.

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Viscoelastic properties of butadiene-styrene block copolymers

Cited by 33 publications

References 9 publications

Linear and nonlinear viscoelasticity of carbon black filled elastomers: Use of complementary rheological characterizations

Linear and nonlinear viscoelasticity of carbon black filled elastomers: Use of complementary rheological characterizations

Melt Flow Properties of Block Copolymers

Effect of a filler on the rheological and mechanical properties of the liquid-crystalline polyester-poly(methyl methacrylate) blends

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