Effects of Nano-Structure of Silica on Dynamic Properties of Styrene-Butadiene Rubber

2007 ◽  
pp. 473-478
Author(s):  
N.L. Lazić ◽  
J. Budinski-Simendić ◽  
S. Ostojić ◽  
M. Kićanović ◽  
M.B. Plavšić
Keyword(s):  
Dynamic Properties ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Nano Structure ◽  
Styrene Butadiene

Effects of Nano-Structure of Silica on Dynamic Properties of Styrene-Butadiene Rubber

2007 ◽  
Vol 555 ◽  
pp. 473-478 ◽  
Author(s):  
N.L. Lazić ◽  
J. Budinski-Simendić ◽  
S. Ostojić ◽  
M. Kićanović ◽  
M.B. Plavšić
Keyword(s):  
Dynamic Properties ◽  
Mechanical Analysis ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Scanning Calorimetry ◽  
Modulated Differential Scanning Calorimetry ◽  
Nano Structure ◽  
Silica Fillers ◽  
The Difference ◽  
Styrene Butadiene

Properties of four materials based on styrene-butadiene rubber (SBR), one without filler and the other three with the same amount but different types of silica fillers, are investigated. The fillers used are Vulkasil S and two new fillers, differing in nano-structures: specific surface area and particle aggregate morphology. All other components in the material formulations are the same as well as the procedures of material preparation. Thermal and thermo-mechanical properties of all four materials are investigated by modulated differential scanning calorimetry (MDSC) and dynamic mechanical analysis (DMA). Morphology of the materials is studied using scanning electron microscopy (SEM). The results for glass transition temperature (Tg ) of gum rubber and three filled rubbers, obtained by MDSC are for all four materials Tg = -50±1 0C, and by DMA loss tangent measurements also for all of them Tg = -29±1 0C. It indicates no significant influence of active silica fillers on the rubber network segment dynamics, in the temperature range close to Tg of SBR. But, at higher temperatures MDSC gives insights into dynamic transitions that are under the influence of filler interactions and sensitive to filler structure. The difference in Tg results obtained for the same material by MDSC and DMA can be understood in terms of different sensitivity of network segment dynamics to conditions provided by those two measuring methods.

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.

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%.

Alpha (Vitrea) Transition in Vulcanized Natural Rubber/Styrene Butadiene Rubber Blends Prepared by Mechanical and Solution Mixing

2012 ◽  
Vol 184 ◽  
pp. 405-410 ◽  
Author(s):  
M. A. Mansilla ◽  
A.A. Ghilarducchi ◽  
H.R. Salva ◽  
A. J. Marzocca
Keyword(s):  
Natural Rubber ◽  
Preparation Method ◽  
Dynamic Properties ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Preparation Methods ◽  
Rubber Blends ◽  
Blend Composition ◽  
Rouse Theory ◽  
Styrene Butadiene

The preparation method of an elastomeric blend can influence the mechanical properties of the vulcanized compound. In this research elastomeric blends composed by natural rubber and styrene butadiene rubber were mixed using two different methods: by mixing in a roll mill and by dissolution of both elastomers in toluene, mixing of both solutions with the curatives and the evaporation of the solvent. Samples with different Natural Rubber/Styrene Butadiene Rubber relation were prepared by both methods and vulcanized at 433K with a system based on sulphur and accelerator (N-t-butyl-2-benzothiazole sulfenamide) up to the time of optimum cure. The blend composition and the preparation methods have a strong influence in the mechanical dynamic properties. Scanning Electron Microscopy observations indicate that, in the blends prepared by the dissolution method, the samples show better miscibility of the constitutive phases than those prepared by the roll milling method. The temperature dependence of the internal friction was studied for each sample using a subresonant forced pendulum at 1 Hz between 190K and 250K. Depending on the blend composition, one or two glass transition temperatures (Tg) associated to the α-relaxation were measured. In the last case each Tgcorresponds to each elastomeric phase of the compound. The loss tangent data for each compound was analyzed using a mixture law of two phases in the frame of the Rouse theory. The adjustment of the data to the proposed model was very good for both preparation method and the whole composition range of the compounds. Then it was possible to obtain the Tg, the main relaxation time and the activation energy values of each compound and, in some samples, the respective values for each elastomeric phase.

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