INFLUENCE OF END-FUNCTIONALIZED SOLUTION STYRENE–BUTADIENE RUBBER ON SILICA-FILLED VULCANIZATES WITH VARIOUS SILICA–SILANE SYSTEMS

2018 ◽  
Vol 92 (2) ◽  
pp. 364-377 ◽  
Author(s):  
Byungkyu Ahn ◽  
Nam Park ◽  
Donghyuk Kim ◽  
Wonho Kim
Keyword(s):  
Physical Properties ◽  
Coupling Agent ◽  
Functional Group ◽  
Silica Content ◽  
Alkoxy Group ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Cross Link ◽  
The Cross ◽  
Styrene Butadiene

ABSTRACT We investigated how end-functionalized solution styrene–butadiene rubber (SSBR) affects the vulcanizate structures and the physical properties of silica-filled vulcanizates using non-functionalized and end-functionalized SSBRs with aminopropylalkoxysilane. Two silane agents were used. Triethoxy(octyl)silane was used as a covering agent, and bis-[3-(triethoxysilyl)propyl]disulfide was applied as a coupling agent. The effects of three different silica–silane systems with a covering agent (CV), a coupling agent (CP), or with no silane (NS) were analyzed. In the CV and NS systems, the cross-link densities induced by the polymer and curing system were similar with respect to the end-functionalization. Further, the cross-link densities induced by the silica–silane system were similar, regardless of the end-functionalization. However, the CP system exhibited similar cross-link densities, irrespective of functionalization. Both the coupling agent and end-functional group chemically bonded with the silanol groups of silica, thus competing with each other and affecting the vulcanizate structure. However, increasing the silica content decreased the effect of end-functionalization because the content of the coupling agent increased, and the end-functional group was less mobile than the coupling agent's alkoxy group.

Barium and strontium ferrite-filled composites based on NBR and SBR

2018 ◽  
Vol 51 (5) ◽  
pp. 421-439 ◽  
Author(s):  
Ján Kruželák ◽  
Martina Matvejová ◽  
Rastislav Dosoudil ◽  
Ivan Hudec
Keyword(s):  
Barium Ferrite ◽  
Strontium Ferrite ◽  
Styrene Butadiene Rubber ◽  
Magnetic Characteristics ◽  
Butadiene Rubber ◽  
Magnetic Composites ◽  
Link Density ◽  
Cross Link Density ◽  
The Cross ◽  
Styrene Butadiene

In the first part of the research, rubber magnetic composites were prepared by incorporation of strontium and barium ferrite in concentration scale ranging from 0 to 200 phr into rubber matrices based on acrylonitrile–butadiene rubber and styrene–butadiene rubber. The main objective was to investigate the influence of the type and content of magnetic filler on the cross-link density, physical–mechanical and magnetic characteristics of the prepared composites. In the second part of the study, the content of magnetic fillers was kept on constant level—200 phr and the main aim was to investigate the change in mutual combination of both fillers on the cross-linking and properties of the rubber magnets. The results revealed that both fillers show reinforcement effect in the rubber matrices. The higher tensile strength of composites was achieved by application of barium ferrite. Magnetic properties of composite materials were significantly influenced by magnetic characteristics of magnetic fillers. Higher remanent magnetic induction of barium ferrite was reflected in higher remanent magnetization of the equivalent composites. On the other hand, higher coercivity of strontium ferrite resulted in higher coercivity of strontium ferrite-filled composites.

The Structure of Gels. IX. Effects of Plasticizers on the Physical Properties of Styrene Butadiene Rubber

1959 ◽  
Vol 32 (2) ◽  
pp. 536-538
Author(s):  
M. P. Zverev ◽  
P. I. Zubov
Keyword(s):  
Molecular Structure ◽  
Physical Properties ◽  
Intramolecular Interaction ◽  
Styrene Butadiene Rubber ◽  
Flow Transition ◽  
Butadiene Rubber ◽  
Transition Temperatures ◽  
Relative Extension ◽  
Styrene Butadiene

Abstract 1. The glass and flow temperatures and the strength and relative extension of rubber depend not only on the concentration of the plasticizer but also on its molecular structure. 2. Styrene butadiene rubber plasticized with nonpolar plasticizers has higher glass and flow transition temperatures than rubber plasticized with polar substances. The same relationships are found for the strength and relative extension of vulcanizates of this rubber. 3. Nonpolar plasticizers also weaken intramolecular interaction to a greater extent than polar plasticizers.

Starch/SBR Biocomposites Prepared by Solid Blend Method: Effect of Surface Modification and Coupling Agent

2012 ◽  
Vol 430-432 ◽  
pp. 1076-1080
Author(s):  
Mei Chun Li ◽  
Xin Ge ◽  
Jong Hyuk Lim ◽  
Min Su Kim ◽  
Ur Ryong Cho
Keyword(s):  
Mechanical Properties ◽  
Coupling Agent ◽  
Interfacial Interaction ◽  
Ceric Ammonium Nitrate ◽  
Rubber Matrix ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Method Effect ◽  
Styrene Butadiene ◽  
Effect Of Surface

Starch/Styrene Butadiene Rubber (SBR) biocomposites were prepared by directly blending of starch and SBR on a two-roll miller. Two types of starch: pure starch and modified starch (M-starch) were used as rubber fillers. M-starch were synthesized by grafting of methyl methacrylate (MMA) monomer onto starch backbone using ceric ammonium nitrate-initiated radical polymerization. Coupling agent styrene-g-(maleic anhydride) (SMA) was used to further improve the interfacial interaction between the filler and rubber matrix. The morphology and mechanical properties of unmodified starch/SBR and M-starch/SBR biocomposites with SMA content of 0, 1, 3, and 5 phr were investigated. SEM observations showed the particle size of M-starch decreased and their dispersion in the SBR matrix significantly improved than unmodified starch. Mechanical properties of M-starch/SBR biocomposites were superior than those of unmodified starch/SBR biocomposites.

Effect of silane coupling agent on the structure and mechanical properties of nano-dispersed clay filled styrene butadiene rubber

2014 ◽  
Vol 37 (3) ◽  
pp. 890-896 ◽  
Author(s):  
Shaojian He ◽  
Yang Xue ◽  
Jun Lin ◽  
Liqun Zhang ◽  
Xiaoze Du ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Silane Coupling ◽  
Styrene Butadiene

Effect of a coupling agent on the properties of hemp-hurd-powder-filled styrene-butadiene rubber

2011 ◽  
Vol 121 (2) ◽  
pp. 681-689 ◽  
Author(s):  
Jie Wang ◽  
Weidong Wu ◽  
Wencai Wang ◽  
Jianchun Zhang
Keyword(s):  
Coupling Agent ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Styrene Butadiene ◽  
Hemp Hurd
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