scholarly journals Fresh and Hardened Properties of Styrene Butadiene Rubber (SBR) Modified Concrete

2020 ◽  
Vol 5 (4) ◽  
pp. 457-461
Author(s):  
Muhammad Ahmed Qadri ◽  
Huzaifah Hameed ◽  
Osama Bhutta
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Total Porosity ◽  
Lower Percentage ◽  
Partial Replacement ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Chloride Induced Corrosion ◽  
Hardened Properties ◽  
Styrene Butadiene

The durability of concrete has been studied ever since it was first used. Researchers have incorporated several materials to make concrete strong and durable. This research focuses on the infusion of styrene butadiene rubber polymer (SBR) as a partial replacement of cement and studies its effects on fresh and hardened properties of concrete. Samples were prepared using partial replacement of SBR in proportions of 0%, 5%, 10% and 20%. Results showed that the fresh density of concrete decreased with the addition of SBR whereas the trends of workability showed an increase with cement replacement. Compressive strength increased at lower percentage replacements however the flexural and tensile strength increased till 15% SBR addition after which it decreased. The total porosity in terms of water absorption decreased which makes SBR modified concrete feasible for concretes exposed to moist conditions and the decreased porosity would increase its durability against chloride induced corrosion.

Mechanical and Vulcanization Behaviors of SBR/N330 and SBR/N330/PBMCN Nanocomposites

2011 ◽  
Vol 230-232 ◽  
pp. 103-106
Author(s):  
Hai Tao Liu ◽  
Jing Feng Zhang ◽  
Yi Guang Tian ◽  
Xue Jun Weng ◽  
Shi E Lin
Keyword(s):  
Tensile Strength ◽  
Electron Microscope ◽  
Mass Fraction ◽  
Partial Replacement ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Melt Mixing ◽  
Elongation At Break ◽  
Styrene Butadiene ◽  
Scanning Electron

Mechanical and vulcanization behaviors of styrene-butadiene rubber(SBR)/N330 and SBR/N330/PBMCN nanocomposites were investigated via partial replacement of SBR with pyrophyllite based modified composite nanopowder(PBMCN), which were prepared by melt mixing procedure. Results show a fairly good dispersion of PBMCN in the SBR/N330/PBMCN composites characterized by field-emission scanning electron microscope (FESEM). Mechanical and vulcanization behaviors of the as-abtained pruducts were measured according to GB/T 528-2009 and GB/T 16584-1996, respectively. Near properties in tensile strength, elongation at break and vulcanization behaviors were observed in SBR/N330/PBMCN nanocomposites when SBR was partially replaced by PBMCN for 8% mass fraction. A possible reinforcement mechanism of PBMCN to SBR/N330/PBMCN nanocomposites is also dicussed based on the experiment.

Tensile Behavior after Oxidative Aging of Gum and Black-Filled Vulcanizates of SBR and NR

1999 ◽  
Vol 72 (4) ◽  
pp. 721-730 ◽  
Author(s):  
G. R. Hamed ◽  
J. Zhao
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Tensile Behavior ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Oxidative Aging ◽  
Prolonged Aging ◽  
Aging Period ◽  
Early Aging ◽  
Styrene Butadiene

Abstract Typical sulfur-cured vulcanizates of styrene-butadiene rubber (SBR) and natural rubber (NR) were prepared, and subjected to air-oven aging at 100 °C. Gum specimens exhibited an initial aging period in which stiffness was unchanged, while tensile strength and strain-to-break were significantly reduced. In contrast, black-filled vulcanizates stiffened during early aging. After intermediate aging times, NR specimens softened, while SBR stiffened. With prolonged aging, all compositions became hard and inextensible.

scholarly journals Effects of alkanolamide addition on cure characteristics, crosslink density and tensile properties of carbon-black-filled styrene-butadiene rubber compounds

2018 ◽  
Vol 197 ◽  
pp. 12006 ◽  
Author(s):  
Indra Surya ◽  
Hanafi Ismail
Keyword(s):  
Tensile Strength ◽  
Carbon Black ◽  
Tensile Properties ◽  
Crosslink Density ◽  
Density Measurement ◽  
Tensile Modulus ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Cure Characteristics ◽  
Styrene Butadiene

By using a semi-efficient sulphur vulcanisation system, the effects of alkanolamide (ALK) addition on cure characteristics, crosslink density and tensile properties of carbon black (CB)-filled styrene-butadiene rubber (SBR) compounds were investigated. The ALK was prepared from Refined Bleached Deodorized Palm Stearin and diethanolamine and added into the CB-filled SBR compounds. The ALK loadings were 1.0, 3.0, 5.0 and 7.0 phr. It was found that ALK decreased the scorch and cure times of the CB-filled SBR compounds. ALK also improved the tensile modulus and tensile strength; especially up to a 5.0 phr of loading. The crosslink density measurement proved that the 5.0 phr of ALK exhibited the highest degree of crosslink density which caused the highest in tensile modulus and tensile strength. Due to its plasticity effect, ALK increased the elongation at break of the CB-filled SBR vulcanisates.

scholarly journals Preparation and Preliminary Study on Irradiated and Thermally Treated Polypropylene (PP) - Styrene Butadiene Rubber (SBR) Composite

2011 ◽  
Vol 3 (3) ◽  
pp. 471-479
Author(s):  
M. S. I. Mozumder ◽  
M. M. Rahman ◽  
M. A. Rashid ◽  
M. A. Islam ◽  
M. E. Haque
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
Radiation Dose ◽  
Aging Time ◽  
Modulus Of Elasticity ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Preliminary Study ◽  
Styrene Butadiene ◽  
Thermally Treated

The tensile strength (TS) and elastic modulus (ES) of non-irradiated (thermally treated) and irradiated Polypropylene (PP) - styrene butadiene rubber (SBR) composites were studied. The content of SBR (mass %) on PP and radiation dose play an important role on tensile strength and modulus of elasticity of PP-SBR composites. Tensile strength (TS) decreased markedly on increasing the SBR content on PP and even on exposing to radiation. The elastic modulus (EM) of PP-SBR composite has a tendency to increase with radiation dose and aging time but decreases with SBR loading. The water uptakes increase with SBR loading which accelerate with aging.Keywords: Polypropylene; Styrene butadiene rubber; Tensile strength; Elastic modulus.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i3.3288               J. Sci. Res. 3 (3), 481-489 (2011)

scholarly journals Characterizing Distributions of Tensile Strength and Crack Precursor Size to Evaluate Filler Dispersion Effects and Reliability of Rubber

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 203 ◽  
Author(s):  
Christopher G. Robertson ◽  
Lewis B. Tunnicliffe ◽  
Lawrence Maciag ◽  
Mark A. Bauman ◽  
Kurt Miller ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Average Diameter ◽  
Strength Distribution ◽  
Glass Beads ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Failure Distribution ◽  
Filler Dispersion ◽  
Control Compound ◽  
Styrene Butadiene

Undispersed filler agglomerates or other substantial inclusions/contaminants in rubber can act as large crack precursors that reduce the strength and fatigue lifetime of the material. To demonstrate this, we use tensile strength (stress at break, σb) data from 50 specimens to characterize the failure distribution behavior of carbon black (CB) reinforced styrene-butadiene rubber (SBR) compounds. Poor mixing was simulated by adding a portion of the CB late in the mixing process, and glass beads (microspheres) with 517 μm average diameter were introduced during milling to reproduce the effects of large inclusions. The σb distribution was well described with a simple unimodal Weibull distribution for the control compound, but the tensile strengths of the poor CB dispersion material and the compounds with the glass beads required bimodal Weibull distributions. For the material with the lowest level of glass beads—corresponding to less than one microsphere per test specimen—the bimodal failure distribution spanned a very large range of σb from 13.7 to 22.7 MPa in contrast to the relatively narrow σb distribution for the control from 18.4 to 23.8 MPa. Crack precursor size (c0) distributions were also inferred from the data, and the glass beads introduced c0 values in the 400 μm range compared to about 180 μm for the control. In contrast to σb, critical tearing energy (tear strength) was unaffected by the presence of the CB agglomerates and glass beads, because the strain energy focuses on the pre-cut macroscopic crack in the sample during tear testing rather than on the microscopic crack precursors within the rubber. The glass beads were not detected by conventional filler dispersion measurements using interferometric microscopy, indicating that tensile strength distribution characterization is an important complementary approach for identifying the presence of minor amounts of large inclusions in rubber.

Influence of Novel Electron Beam Modified Surface Treated Dual Phase Filler on Rheometric and Mechanical Properties of Styrene Butadiene Rubber Vulcanizates

2003 ◽  
Vol 76 (2) ◽  
pp. 299-317 ◽  
Author(s):  
A. M. Shanmugharaj ◽  
Anil K. Bhowmick
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Beam ◽  
Styrene Butadiene Rubber ◽  
Dual Phase ◽  
Butadiene Rubber ◽  
Elongation At Break ◽  
Polymer Filler ◽  
Modified Surface ◽  
Styrene Butadiene

Abstract Rheometric and mechanical properties, hysteresis and swelling behavior of the Styrene-Butadiene Rubber vulcanizates (SBR) filled with unmodified and novel electron beam modified surface treated dual phase fillers were investigated. Scorch time increases for these modified filler loaded vulcanizates due to introduction of quinone type oxygen on the surface. Electron beam modification of dual phase filler in the absence of trimethylol propanetriacrylate (TMPTA) or triethoxysilylpropyltetrasulphide (Si-69) significantly improves the modulus of the SBR vulcanizates, whereas the values of tensile strength and elongation at break drop. However, presence of TMPTA or silane slightly increases the modulus with significant improvement in tensile strength. This effect is more pronounced at higher loading of these modified fillers in SBR vulcanizates. These variations in modulus and tensile strength are explained by the equilibrium swelling data, Kraus plot and a new mathematical model interpreting the polymer-filler interaction. Hysteresis loss ratio of SBR vulcanizates loaded with irradiated fillers in absence and presence of TMPTA or silane increases due to highly aggregated structure of the filler.

The Mechanical Properties of Modified Attapulgite Reinforced Nature Rubber and Styrene-Butadiene Rubber Nanocomposites

2010 ◽  
Vol 150-151 ◽  
pp. 762-765
Author(s):  
Ji Hu Wang ◽  
Hong Bo Liu ◽  
Shao Guo Wen ◽  
Yan Shen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Coupling Agent ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
The Matrix ◽  
Modified Attapulgite ◽  
Rubber Nanocomposites ◽  
Styrene Butadiene

Attapulgite (AT)/natural rubber (NR)/ styrene-butadiene rubber (SBR) nanocomposites have been prepared after attapulgite was modified by different coupling agent. The treatment of AT caused the adhesion between AT nanorods and the nature rubber/styrene-butadiene rubber was improved, which enhanced the tensile properties of the matrix. The tensile strength of composites attained 15.6 MPa after AT was modified by 3%wt Si-69 coupling with addition of 20 phr.

Effect of Epoxidized Palm Oil Loading on the Swelling and Mechanical Properties of SBR Vulcanizates

2013 ◽  
Vol 812 ◽  
pp. 236-240
Author(s):  
Mohd Zaki Nurul Ayunie ◽  
Ahmad Zafir Romli ◽  
M.A. Wahab ◽  
Mohd Hanafiah Abidin
Keyword(s):  
Tensile Strength ◽  
Carbon Black ◽  
Palm Oil ◽  
Crosslink Density ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Elongation At Break ◽  
Epoxidized Palm Oil ◽  
Opposite Trend ◽  
Styrene Butadiene

The effects of epoxidized palm oil (EPO) content in carbon black filled styrene butadiene rubber (SBR) on tensile strength, elongation at break and crosslink density were investigated. Five different loadings of EPO in parts per hundred rubbers (phr) were used to test the tensile strength of the carbon black filled SBR which showed a decreasing trend as the content of EPO in the vulcanizates increased. In contrast, elongation at break showed the opposite trend where the elongation at break increased as the content of the EPO increased. The SBR vulcanizates with the highest content of EPO gave the highest value of elongation at break which is 2393.56%. In the case of swelling index, it was found to increase as the amount of EPO increased.

scholarly journals Improvement The Mechanical Properties of Styrene Butadiene Rubber By Using Silica Fume

2017 ◽  
Vol 2 (12) ◽  
pp. 31
Author(s):  
Ali Abed Salman
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Silica Fume ◽  
Polymeric Materials ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Materials Used ◽  
Styrene Butadiene

Styrene butadiene rubber (SBR) is considered to be one of the greatest important polymeric materials used as a bond, so we discussed in this study to improve its properties .This study covers the effect of silica fume on mechanical properties of styrene butadiene rubber reinforced with silica fume. The composites were prepared with (1 to 3 wt. %) of silica fume particles .The results had indicated  that the tensile strength and flexural strength are improved by (11.6% and 13.5%) respectively at 2 wt% and the hardness is  improved by (9.3%) at 3wt%.

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