Experimental study of the rheological properties of butadiene-styrene gum elastomers and compounds

Furuta, Isao; Lobe, Vincent M.; White, James L.

doi:10.1016/0377-0257(76)80021-3

Cited by 15 publications

(5 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simplest method of design is to insert two slabs of rubber between three parallel plates, as shown in Fig. Similar studies have recently been carried out by Furuta et al [98] in our laboratories. Tensile force may be simply related to shear stress.…”

Section: A Parallel Plate Simple Shear Testermentioning

confidence: 74%

“…15). It follows that if we consider the initial bale as a disk with radius R and thickness A, then (compare Furuta et al [98]) 45 R The problem is also identical to the analysis of a Williams compression plastometer.…”

Section: )mentioning

confidence: 94%

“…6). Middleman [190], Chen and Bogue [61], Carreau [55], Furuta et al [98], and Goldstein [103] have tried to use stress overshoot as a critical test for distinguishing the applicability of different nonlinear viscoelastic constitutive equations. Bogue [33] was the first to show that this stress overshoot is primarily a nonlinear viscoelastic effect.…”

Section: Memory Functions Referencesmentioning

confidence: 99%

“…It is well known that many elastomers, including natural rubber (m-l,4-polyisoprene) [6,77,133,135], /ra«s-l,4-polyisoprene [99], ira«s-l,4-polychloroprene [54,98,151], and polyisobutylene [97], can exhibit crystallization when stretched in a tensile testing unit. Very regular backbone structures in the sense of identical character of all or most structural units will lead to the occurrence of crystallinity.…”

Section: A Crystalline Transitions and Stress-induced Crystallizationmentioning

confidence: 99%

See 3 more Smart Citations

Rheological Behavior of Unvulcanized Rubber

White¹

1978

Science &Amp; Technology of Rubber

View full text Add to dashboard Cite

Section: A Parallel Plate Simple Shear Testermentioning

confidence: 74%

Section: )mentioning

confidence: 94%

Section: Memory Functions Referencesmentioning

confidence: 99%

Section: A Crystalline Transitions and Stress-induced Crystallizationmentioning

confidence: 99%

See 2 more Smart Citations

Rheological Behavior of Unvulcanized Rubber

White¹

1978

Science &Amp; Technology of Rubber

View full text Add to dashboard Cite

“…Relaxation after a step shear strain has been investigated 16–28 . Stress relaxation tests have also been conducted in extension, 29,30 compression, 29 and after cessation of steady shear flow 17,28,31,32 . While most of this research has focused on carbon black‐filled elastomers, some of it has focused on silica‐filled compounds, 19,21,26–30,32 and some of this research has specifically studied SBR/silica systems 21,26–28,30 …”

Section: Introductionmentioning

confidence: 99%

The nonlinear stress relaxation behavior after a step shear of star‐shaped styrene‐butadiene rubber filled with precipitated silica: Experiment and simulation

Pole

Isayev

2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

The nonlinear stress relaxation behavior after a step shear strain of star‐shaped SSBR/silica compounds containing 21 vol% filler of various surface areas was measured and simulated using constitutive equations. A styrene‐butadiene rubber (SBR) gum and SBR filled with silica having BET surface areas of 55, 135, 160, and 195 m2/g were used. Relaxation modulus behavior of the filled compounds was found to be dependent on surface area. Specifically, stress relaxation tests indicated that an increase in surface area led to increase in values of relaxation moduli in both the linear and nonlinear regimes. The time‐dependent relaxation modulus exhibited a plateau at long times of relaxation in compounds containing silica of high surface area. Additionally, good time‐strain superpositions were achieved for all samples at intermediate times of relaxation, and the strain‐dependent damping function decreased with filler surface area. The constitutive equations proposed by Leonov and Simhambhatla and Leonov, modified to include multimodal relaxation of the particle network, were used to predict the time evolution of the relaxation modulus in the nonlinear regime for all samples. The simulations provided good results for the SBR gum for all tested strain levels. Also, in the compounds filled with silica, both models satisfactorily described the experimental observation in the nonlinear regime at low strain levels. However, at higher strain levels, due to a possible slip effect, the simulations overpredicted measured values of the relaxation moduli, thus leading to only qualitative predictions of the observed behavior. It is also possible that neither model accurately captured the floc rupture kinetics of these complex rubber compounds.

show abstract

Rheological and solid wall boundary condition characterization of unvulcanized elastomers and their compounds

Toki

White

1982

J of Applied Polymer Sci

View full text Add to dashboard Cite

SynopsisAn extensive fundamental investigation of the rheological properties and solid wall boundary condition shear stress of elastomers and elastomer-carbon black compounds has been carried out.T h e elastomers were an emulsion butadiene-styrene copolymer (SBR 1500) and a polybutadiene.Shear flow rheological properties were measured using a newly designed sandwich rheometer, in both constant shear rate and creep modes as well as in a capillary rheometer. A constant elongation rate rheometer for elastomers was developed. Stress relaxation measurements were also carried out in the sandwich rheometer. The shear viscosity of the gum elastomers exhibits a constant very high shear zero viscosity (8 X lo8 Pa.s for SBR 1500 at 100°C) and decreases with increasing shear rate. The compounds exhibit yield values of similar magnitude to carbon black compounds of molten plastics. Only the SBR 1500 and its compounds were studied in the elongational flow mode. It was not possible to achieve a steady state in these experiments. An apparatus for measurement of shear stress as a function of velocity (shear rate) a t a specified pressure was developed. The instrument, which we call a friction tester, was used not only to determine wall shear stress but to investigate the regime of flow and potentially determine conditions for the onset of slip. Evidence of changing flow regimes were found, and the implications discussed.

show abstract

Experimental study of the rheological properties of butadiene-styrene gum elastomers and compounds

Cited by 15 publications

References 31 publications

Rheological Behavior of Unvulcanized Rubber

Rheological Behavior of Unvulcanized Rubber

The nonlinear stress relaxation behavior after a step shear of star‐shaped styrene‐butadiene rubber filled with precipitated silica: Experiment and simulation

Rheological and solid wall boundary condition characterization of unvulcanized elastomers and their compounds

Contact Info

Product

Resources

About