A Review of Some of the Factors Affecting Fracture and Fatigue in SBR and BR Vulcanizates

2001 ◽  
Vol 74 (3) ◽  
pp. 409-427 ◽  
Author(s):  
J. Zhao ◽  
G. N. Ghebremeskel
Keyword(s):  
Fatigue Testing ◽  
Failure Mechanisms ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Factors Affecting ◽  
Testing Conditions ◽  
Experimental Parameters ◽  
Static Tensile ◽  
Styrene Content ◽  
Styrene Butadiene

Abstract This paper reviews the effects of polymer macrostructure (molecular weight and the styrene content of SBR) and diene microstructure on the fracture and fatigue life of styrene-butadiene rubber (SBR) and butadiene rubber (BR) vulcanizates. Effects of experimental parameters, such as carbon black and vulcanizing systems, on fracture and fatigue are also discussed. Investigations were performed under static (tensile and tear) and dynamic (fatigue) testing conditions. Finally, the underlying failure mechanisms are discussed.

scholarly journals Effect of the Topology of Carbon-Based Nanofillers on the Filler Networks and Gas Barrier Properties of Rubber Composites

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5416
Author(s):  
Shipeng Wen ◽  
Rui Zhang ◽  
Zongchao Xu ◽  
Long Zheng ◽  
Li Liu
Keyword(s):  
Barrier Properties ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Rubber Composites ◽  
Gas Barrier ◽  
Factors Affecting ◽  
Fibrous Carbon ◽  
Styrene Butadiene ◽  
Gas Barrier Properties ◽  
Carbon Based

The topology of nanofillers is one of the key factors affecting the gas barrier properties of rubber composites. In this research, three types of carbon-based nanofillers, including spherical carbon black (CB), fibrous carbon nanotubes (CNTs), and layered graphene (GE) were chosen to investigate the effect of the topological structures of nanofillers on the gas barrier properties of styrene-butadiene rubber (SBR) composites. Results showed that the structure and strength of the filler networks in SBR composites were closely associated with the topology of nanofillers. When filled with 35 phr CB, 8 phr CNTs, and 4 phr GE, the SBR composites had the same strength of the filler network, while the improvement in gas barrier properties were 39.2%, 12.7%, and 41.2%, respectively, compared with pure SBR composites. Among the three nanofillers, GE exhibited the most excellent enhancement with the smallest filler content, demonstrating the superiority of two-dimensional GE in improving the barrier properties of rubber composites.

A Study of the Thermal Degradation Products of Styrene-Butadiene Type Rubber by Pyrolysis/GC/MS

1996 ◽  
Vol 69 (5) ◽  
pp. 874-884 ◽  
Author(s):  
Ghebrehiwet N. Ghebremeskel ◽  
J. K. Sekinger ◽  
J. L. Hoffpauir ◽  
C. Hendrix
Keyword(s):  
Refractive Index ◽  
Infrared Spectroscopy ◽  
Thermal Degradation ◽  
Degradation Products ◽  
Ease Of Use ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Thermal Degradation Products ◽  
Styrene Content ◽  
Styrene Butadiene

Abstract Pyrolysis coupled with GC/MS was used to study thermal degradation products of styrene—butadiene rubber (SBR). Introduction of samples, using the pyrolysis carrier gas through the split injection port, followed by sub-ambient focusing of pyrolysis products gave reproducible chromatograms. The styrene content of styrene—butadiene copolymer was determined by plotting the GC areas of styrene and butadiene dimer (4-vinlycyclohexene) vs the percent bound styrene measured by refractive index and infrared spectroscopy. The accuracy and ease of use of the technique in determining the styrene content of styrene—butadiene copolymer is also compared to that of the refractive index and infrared spectroscopy methods. Finally, the effects of carbon black and other fillers on the thermal degradation products of the styrene—butadiene copolymer are also discussed.

scholarly journals Effect of styrene content on mechanical and rheological behavior of styrene butadiene rubber

2021 ◽  
Vol 8 (1) ◽  
pp. 015302
Author(s):  
Li’e Wang ◽  
Zhu Luo ◽  
Le Yang ◽  
Hai Wang ◽  
Jincheng Zhong
Keyword(s):  
Rheological Behavior ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Styrene Content ◽  
Styrene Butadiene

EFFECT OF CURING ADDITIVES ON THE DISPERSION KINETICS OF CARBON BLACK IN RUBBER COMPOUNDS)

2011 ◽  
Vol 84 (3) ◽  
pp. 415-424 ◽  
Author(s):  
H. H. Le ◽  
S. Ilisch ◽  
E. Hamann ◽  
M. Keller ◽  
H-J. Radusch
Keyword(s):  
Carbon Black ◽  
Stearic Acid ◽  
Electrical Conductance ◽  
Rubber Matrix ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Dispersion Process ◽  
Styrene Content ◽  
Styrene Butadiene ◽  
Kinetics Of

Abstract The effect of curing additives on the dispersion kinetics of carbon black (CB) in styrene butadiene rubber (SBR) compounds was investigated by means of the method of the online measured electrical conductance. Addition of curing additives such as stearic acid and diphenylguanidine (DPG) accelerates the CB dispersion process significantly. The viscosity of the rubber matrix was not changed after their addition. The addition of stearic acid and DPG may alter the filler–filler interaction that consequently leads to faster dispersion processes. The obtained difference in morphologies of SBR mixtures containing stearic acid and DPG, respectively, are caused by their different infiltration behavior, which may lead to different dispersion mechanisms. Addition of ZnO could not improve the dispersion process of CB because of its limited interaction with CB. Sulfur and N-cyclohexylbenzothiazole-2-sulfenamide decelerate the CB dispersion process. The strong effect of the rubber microstructure such as styrene content and molecular weight on the CB dispersion in SBR mixtures without additives was found and discussed by taking into consideration the known dispersion mechanisms. The influence of addition of curing additives on the CB dispersion in low styrene-content SBR mixtures is much more pronounced than that in high styrene-content SBR mixtures.

DISCOVERY AND DEVELOPMENT OF A NEW SYNTHETIC RUBBER: HIGH TRANS SBR

2013 ◽  
Vol 86 (3) ◽  
pp. 343-350 ◽  
Author(s):  
Russell A. Livigni
Keyword(s):  
Organometallic Compound ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Green Strength ◽  
Repeat Units ◽  
Synthetic Rubber ◽  
Excellent Candidate ◽  
Styrene Content ◽  
Styrene Butadiene ◽  
Selection Of

ABSTRACT The discovery and development of high trans styrene–butadiene rubber (SBR) is presented. High trans SBR is prepared using a novel polymerization initiator of a specific combination of a barium salt and organometallic compound in a hydrocarbon solvent. The trans-1,4 content of the polybutadiene repeat units is sufficiently high, at a low vinyl content, to result in a crystallizing rubber. As a result, high trans SBR has high green strength similar to natural rubber (NR). The barium-based initiating system allows the formation of copolymers between butadiene and styrene, in which the distribution of styrene repeat units is considerably more random than that obtained with an organolithium initiator alone. By a judicious selection of the two initiator composition and the styrene content in the copolymer, high trans SBR also exhibits good building tack, again similar to NR. The properties of high green strength and good building tack for high trans SBR are unique among common synthetic rubbers. As such, high trans SBR is an excellent candidate for use as a tire carcass rubber in radial ply tire construction. High trans SBR is also valuable in tire tread compositions, providing good abrasion resistance.

Effects of White Rot Fungus Physisporinus sp., Isolated in Japan, on Styrene-butadiene Rubber

2020 ◽  
Vol 93 (9) ◽  
pp. 289-292
Author(s):  
Yumi SHIMIZU ◽  
Shuma SATHO ◽  
Taro NAKAJIMA ◽  
Hiroaki KOUZAI ◽  
Kiminori SHIMIZU
Keyword(s):  
White Rot ◽  
White Rot Fungus ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Styrene Butadiene
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