scholarly journals Influence of the addition of styrene-butadiene rubber on the dynamic properties of polymer concrete for machine tool applications

2019 ◽  
Vol 11 (7) ◽  
pp. 168781401986584 ◽  
Author(s):  
Norbert Kepczak
Keyword(s):  
Relaxation Time ◽  
Transfer Function ◽  
Dynamic Properties ◽  
Damping Ratio ◽  
Styrene Butadiene Rubber ◽  
Polymer Concrete ◽  
Butadiene Rubber ◽  
Grain Sizes ◽  
Impulse Excitation ◽  
Styrene Butadiene

In this study, the influence of the addition of styrene-butadiene rubber on the dynamic properties of polymer concrete was investigated. A 10% volume addition of styrene-butadiene rubber granulate with three different grain gradations was used for the tests. The modal study was carried out in the 0 to 2000 Hz frequency range. The response function for a single impulse excitation was tested. The relaxation time after excitation, the modes of natural vibrations and the amplitude of the transfer function values as well as vibration damping ratios were also compared. Finally, conclusions were formulated regarding the application of the styrene-butadiene rubber additive as a material to improve the dynamic properties of polymer concrete. The best results were obtained for a sample made with a 10% styrene-butadiene rubber volume addition with grain sizes from 0.6 to 2 mm. In this case, the biggest decrease of the amplitude of the transfer function value was 76%, while the biggest increase of the damping ratio was 431.5%, in comparison with the clear polymer concrete sample. The worst results were obtained for a sample made with a 10% styrene-butadiene rubber volume addition with grain sizes from 2.5 to 6 mm. In this case, the longest relaxation time of the sample, the increase of the amplitude of the transfer function value and the decrease in the damping coefficient were recorded.

EFFECT OF ELASTOMER NANOPARTICLES ON IMPROVING THE WET SKID RESISTANCE OF SBR/NR COMPOSITES

2016 ◽  
Vol 89 (2) ◽  
pp. 262-271 ◽  
Author(s):  
Qingguo Wang ◽  
Jingrui Liu ◽  
Quande Cui ◽  
Xiao Xiao
Keyword(s):  
Dynamic Properties ◽  
Rolling Resistance ◽  
Dynamic Mechanical Properties ◽  
Fatigue Properties ◽  
Styrene Butadiene Rubber ◽  
Skid Resistance ◽  
Butadiene Rubber ◽  
Temperature Range ◽  
Styrene Butadiene ◽  
Wet Skid Resistance

ABSTRACT How to improve the wet skid resistance of rubber composites for tire tread while decreasing the rolling resistance is very important for both rubber researchers and industry. The irradiation-vulcanized elastomer particles, ultrafine fully-vulcanized powder nitrile butadiene rubber (UFPNBR), having the diameter of about 80 nm, were studied on modifying the dynamic mechanical properties of styrene butadiene rubber/natural rubber (SBR/NR) composites for tire tread. It is notable that the UFPNBR particles can improve the tanδ values of SBR/NR composites in a temperature range from −10 to 20 °C and decrease the tanδ values in the temperature range from 50 to 70 °C simultaneously, which indicates that the UFPNBR particles not only can improve the wet skid resistance but also can reduce the rolling resistance of the SBR/NR composites. On the other hand, the UFPNBR-modified SBR/NR composites also have good dynamic properties for safety operation of tires at high temperature and good tensile strength, tear strength, and fatigue properties in the range of 8 phr UFPNBR loadings.

INFLUENCES OF THE COMPATIBILITY OF NR/SSBR AND PHASE-SELECTIVE DISTRIBUTION OF SILICA ON ITS STATIC AND DYNAMIC PROPERTIES

2019 ◽  
pp. 000-000
Author(s):  
Qing-Yuan Han ◽  
Xu Li ◽  
Yu-Chun Li ◽  
You-Ping Wu
Keyword(s):  
Dynamic Properties ◽  
Rolling Resistance ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Scanning Calorimetry ◽  
Transmission Electron ◽  
Bound Rubber ◽  
Tan Δ ◽  
Styrene Butadiene ◽  
Wet Skid Resistance

ABSTRACT The compatibility between solution polymerized styrene–butadiene rubber (SSBR 2466) and natural rubber (NR) is characterized by differential scanning calorimetry and dynamic mechanical thermal analysis. The single glass transition in the entire temperature range of all NR/SSBR blends and good correlation between Tg and SSBR fraction prove the excellent compatibility between SSBR 2466 and NR. With increasing SSBR content, a reduced Payne effect, more homogeneous dispersion of silica, stronger rubber–filler interaction, and more silica selectively distributed in the SSBR phase were determined via rubber-processing analysis, transmission electron microscopy, bound rubber, and thermogravimetric analysis, respectively. The high vinyl content, low styrene content, and end-functionalized structure of SSBR play vital roles in promoting its compatibility with NR and a stronger rubber–silica linkage. The resulting increased tan δ at 0 °C and low tan δ at 60 °C indicates good wet-skid resistance and low rolling resistance by blending SSBR 2466, and 70/30 NR/SSBR is the best balance for producing a “green tire” tread.

Improvement of Quality of Concrete and Reducing Corrosion of Steel Reinforcement by Using Polypropylene Fibers, Styrene-Butadiene Rubber, and Integral Waterproofing Admixture

2021 ◽  
Vol 895 ◽  
pp. 68-76
Author(s):  
Nibras Ali Alsahaf ◽  
Asaad Mohammed Al Gharaawyi ◽  
Layth Abdul Rasool Al Asadi ◽  
Qusay A. Jabal ◽  
Mohammed Abbas Al-Jumaili
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Steel Reinforcement ◽  
Styrene Butadiene Rubber ◽  
Polymer Concrete ◽  
Polypropylene Fibers ◽  
Butadiene Rubber ◽  
Corrosion Of Steel ◽  
Styrene Butadiene

Reinforced concrete foundation, rigid pavements, and other structural members with attachment with ground or salty water like piers or retaining walls and others, subjected to chloride and sulfate salts attacks and that leads to damaging the structures or at least reduce durability, some concrete admixtures like waterproofing admixtures or polymers reduce permeability and increase mechanical properties and also durability. This research aims to improve the quality of concrete and reducing corrosion of steel reinforcement by using integral waterproofing admixture, styrene-butadiene rubber (SBR) and polypropylene fibers. mechanical properties such as compressive, flexural strength highly improved in this study. The reduction of weight of steel reinforcement by subjecting reinforced concrete specimens to chloride water (6% concentration) was 2.61 % for ordinary reinforced concrete and by using waterproof –polymer concrete with poly fibers, the reduction was less and its value was 0.93% and that was for 6 months’ exposure, and for 1-year exposure, the reduction in steel reinforcement weight was 4.72% for ordinary concrete and 1.4% for waterproof concrete.

Studies on Mechanical Properties and Dynamic Performance of SSBR/CB/Silica Composites

2016 ◽  
Vol 717 ◽  
pp. 52-56 ◽  
Author(s):  
Wei Liu ◽  
Lin Li ◽  
Bing Kai Han ◽  
Cheng Zhong Zong
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Dynamic Properties ◽  
Dynamic Performance ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Hybrid Fillers ◽  
Two Component ◽  
Series Of Experiments ◽  
Styrene Butadiene

Carbon black ( CB ) and silica were used as two-component fillers to enhance the practicability of rubber. In this study, the microstructure, mechanical and dynamic properties of solution-polymerized styrene-butadiene rubber ( SSBR ) vulcanizates filled with carbon black and silica were characterized. 50 phr of total hybrid fillers was used as the base. A series of experiments with different ratios of CB/silica were carried out to determine the best contribution to the performance of SSBR vulcanizates. The studies have shown that when the vulcanizates exhibited the better overall mechanical and dynamic performance with 20 phr silica loading and 30 phr CB loading.

Effect of chemical structure of elastomer on filler dispersion and interactions in silica/solution-polymerized styrene butadiene rubber composites through molecular dynamics simulation

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 14643-14650 ◽  
Author(s):  
Yanlong Luo ◽  
Liangliang Qu ◽  
Huifang Su ◽  
Tung W. Chan ◽  
Sizhu Wu
Keyword(s):  
Chemical Structure ◽  
Dynamic Properties ◽  
Dynamics Simulation ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Rubber Composites ◽  
Chemical Structures ◽  
Silica Solution ◽  
Filler Dispersion ◽  
Styrene Butadiene

The dynamic properties, filler–rubber interactions, and filler dispersion in silica/SSBR composites with various chemical structures of SSBR were studied using MD. Competing effects led to the existence of an optimum modifier content of 14.2 wt%.

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