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

2020 ◽  
Vol 138 (12) ◽  
pp. 50080
Author(s):  
Sandeep S. Pole ◽  
Avraam I. Isayev
Keyword(s):  
Stress Relaxation ◽  
Relaxation Behavior ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Stress Relaxation Behavior ◽  
Precipitated Silica ◽  
Nonlinear Stress ◽  
Experiment And Simulation ◽  
Styrene Butadiene

Nonlinear stress relaxation of silica filled solution-polymerized styrene-butadiene rubber compounds

2009 ◽  
Vol 112 (6) ◽  
pp. 3569-3574 ◽  
Author(s):  
Jin Sun ◽  
Hong Li ◽  
Yihu Song ◽  
Qiang Zheng ◽  
Li He ◽  
...  
Keyword(s):  
Stress Relaxation ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Rubber Compounds ◽  
Nonlinear Stress ◽  
Styrene Butadiene

scholarly journals Hybrid Silica-Based Fillers in Nanocomposites: Influence of Isotropic/Isotropic and Isotropic/Anisotropic Fillers on Mechanical Properties of Styrene-Butadiene (SBR)-Based Rubber

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2413
Author(s):  
Mariapaola Staropoli ◽  
Vincent Rogé ◽  
Enzo Moretto ◽  
Joffrey Didierjean ◽  
Marc Michel ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silica Nanoparticles ◽  
Synergetic Effect ◽  
Mechanical Analysis ◽  
Rubber Matrix ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Precipitated Silica ◽  
Scanning Transmission ◽  
Styrene Butadiene

The improvement of mechanical properties of polymer-based nanocomposites is usually obtained through a strong polymer–silica interaction. Most often, precipitated silica nanoparticles are used as filler. In this work, we study the synergetic effect occurring between dual silica-based fillers in a styrene-butadiene rubber (SBR)/polybutadiene (PBD) rubber matrix. Precipitated Highly Dispersed Silica (HDS) nanoparticles (10 nm) have been associated with spherical Stöber silica nanoparticles (250 nm) and anisotropic nano-Sepiolite. By imaging filler at nano scale through Scanning Transmission Electron Microscopy, we have shown that anisotropic fillers align only in presence of a critical amount of HDS. The dynamic mechanical analysis of rubber compounds confirms that this alignment leads to a stiffer nanocomposite when compared to Sepiolite alone. On the contrary, spherical 250 nm nanoparticles inhibit percolation network and reduce the nanocomposite stiffness.

Differential Dynamic Shear Moduli of Carbon Black-Filled Styrene-Butadiene Rubber Subjected to Large Shear Strain Histories

1986 ◽  
Vol 59 (2) ◽  
pp. 241-254 ◽  
Author(s):  
Koichi Arai ◽  
John D. Ferry
Keyword(s):  
Stress Relaxation ◽  
Carbon Black ◽  
Shear Strain ◽  
Single Step ◽  
Fourth Power ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Initial Value ◽  
Shear Moduli ◽  
Styrene Butadiene

Abstract Combined measurements of shear-stress relaxation and differential dynamic storage and loss shear moduli G′ and G″ following a single-step shear strain of 0.4, as well as measurements of dynamic moduli in on-off strain and stress histories, have been made on styrene-butadiene rubber (type 1502) filled with carbon black (N299) at loadings of 40, 50, 60, and 70 phr, with 10 phr Sundex 790 oil. Both cured and uncured compounds were studied at temperatures of 25.0° and −0.5°C respectively. The maximum oscillatory shear strain was 0.005, and the frequency was from 0.4 to 1.8 Hz. The storage shear modulus G′(ω, 0) measured without imposition of static strain was approximately proportional to the fourth power of the volume fraction of black. With imposition of single-step strain, the differential storage modulus G′(ω, γ; t) fell 25% to 35% but slowly recovered somewhat while the strain was maintained for 4 to 5 h. During this period, the static stress relaxed continuously. At the highest content of black, the drop in log G′ was the least, and the final recovery was closest to the initial value of G′(ω, 0). In on-off experiments on uncured compounds, when the strain was “on” for 250 s and then “off” (either stress or strain returned to zero), G′ decreased when the strain was imposed as before and decreased further when it was removed. In the “off” state, G′ recovered partially but did not attain the initial value of G′(ω, 0) even after 7 d. In on-off experiments on cured compounds, removal of stress caused G′ to either increase or decrease depending on the content of black; in any case, in the “off” state, G′ recovered completely to its initial value. Other strain histories involved on-off sequences with different “on” periods and multiple on-off sequences with different “on” periods and multiple on-off sequences. The results are interpreted in terms of a network of black particle aggregates whose contacts can slowly rearrange even in the absence of stress as shown by stress relaxation at very small strains in earlier studies. In large strains, it is postulated that some contacts are broken but can partially reform, especially in the stress-free state; the rate of reformation is similar to that of small-strain stress relaxation. Only in cured compounds is the network fully recovered, presumably because in these the particles are imbedded in a crosslinked matrix and have crosslinked bridges that facilitate reestablishment of interparticle contacts, whereas in uncured compounds the matrix has no crosslinks and the bound rubber on adjacent particles may be merely entangled.

Processibility and Mechanical Properties of Mullite-Filled Styrene Butadiene Rubber Composites

2011 ◽  
Vol 284-286 ◽  
pp. 401-410
Author(s):  
Qiong Qiong Liu
Keyword(s):  
Mechanical Properties ◽  
Silane Coupling Agent ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Rubber Composites ◽  
Precipitated Silica ◽  
Roll Mill ◽  
Silane Coupling ◽  
Styrene Butadiene ◽  
Reinforcing Filler

Mullite (3A12O3·2SiO2) is an aluminosilicate ceramic of great technological importance. We investigated its potential as fillers in rubber. Mullites untreated or treated with 3% γ-mecapto-propyltrimethoxysilane (A-189) were added into styrene-butadiene rubber (SBR) materials on a laboratory-sized two-roll mill. For comparison, commercial precipitated silica was also used. The effect of these fillers on the cure characteristics, processibility and mechanical properties of SBR at various loadings, ranging from 0 to 50 phr was investigated. The results showed that mullite was a semi-reinforcing filler for SBR materials and exhibits better overall cure properties, lower Mooney viscosity, lower tensile set, better resilience as compared to precipitated silica, while it is inferior to precipitated silica especially with regard to tensile strength, tear strength and abrasion resistance. The presence of the silane coupling agent can enhance mechanical properties of filled SBR vulcanizates to some extent.

scholarly journals NONLINEAR STRESS RELAXATION BEHAVIOR OF POLYETHYLENE

1971 ◽  
Vol 27 (2) ◽  
pp. 65-72
Author(s):  
Takuji Yamaguchi ◽  
Tetsuo Takahashi ◽  
Teruaki Yanagawa ◽  
Satoo Kimura
Keyword(s):  
Stress Relaxation ◽  
Relaxation Behavior ◽  
Stress Relaxation Behavior ◽  
Nonlinear Stress

Influence of Powder Surface Treatment on the Dispersion Behavior of Silica into Polymeric Materials

2002 ◽  
Vol 75 (4) ◽  
pp. 725-737 ◽  
Author(s):  
Alberto Scurati ◽  
Ica Manas-Zloczower ◽  
Donald L. Feke
Keyword(s):  
Surface Treatment ◽  
Coupling Agent ◽  
Polymeric Materials ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Powder Surface ◽  
Precipitated Silica ◽  
Controlled Flow ◽  
Styrene Butadiene ◽  
Effect Of Surface

Abstract The effect of surface treatment on silica agglomerate dispersibility was investigated. Precipitated silica powders were treated with a commercially available coupling agent Bis-(triethoxysilylpropyl)-tetrasulphane (TESPT) in a blender. Spherical agglomerates of known density were prepared and dispersed in styrene butadiene rubber (SBR) under controlled flow conditions. The erosion kinetics was monitored by measuring the reduction in size of parent agglomerate with time. Silica dispersibility was greatly enhanced upon surface treatment. The coupling agent used in surface treatment is known to reduce filler—filler interactions and therefore affects the intrinsic cohesivity of the powder. However powder surface treatment can also induce changes in agglomerate morphology and filler-liquid interactions. The work presented in this paper evidences such changes.

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