Carbon—Silica Dual Phase Filler, a new Generation Reinforcing Agent for Rubber: Part IX. Application to Truck Tire Tread Compound

ABSTRACT:In this research, the influence of adding ␣-cellulose powder to styrene-butadiene rubber (SBR) compounds was investigated. Physicomechanical properties of SBR-␣-cellulose composites, including tensile strength, elongation, Young's modulus, tear strength, hardness, abrasion, resilience, and compression set, before and after ageing, were determined and analyzed. Young's modulus, hardness, and compression set increased and elongation and resilience decreased with increasing ␣-cellulose loading in the composites, whereas tensile strength, tear strength, and abrasion resistance initially increased at low ␣-cellulose concentration (5 phr), after which these properties decreased with increasing ␣-cellulose content. Lower loadings of ␣-cellulose (5 phr) showed better results than higher loadings, given that tensile strength, tear strength, and abrasion resistance increased at low ␣-cellulose concentration. Theoretical prediction of elastic modulus was carried out using rule of mixtures, Hashin, Kerner, and Halpin-Tsai equations. Calculated results show that these equations are not suitable for accurate prediction for the work carried out. However, these models can be used with confidence for the prediction of elastic modulus because experimental results are higher than the calculated values.

Section: Abrasionmentioning

confidence: 99%

Physicomechanical properties of α‐cellulose–filled styrene–butadiene rubber composites

Haghighat

Ali

Khorasani

2005

“…For example, NR has been replaced by styrene-butadiene rubber (SBR) and butadiene rubber (BR) in car tires, but in truck tires, off-road tires, and aircraft tires, NR is always the first choice. 1 Unlike other polymer materials, to attain good mechanical properties in accordance with the final application, elastomers have to be reinforced with fillers and chemical crosslinkages. Carbon black is the major reinforcing filler in the tire industry, but, since the introduction of "green tire technology," carbon black has been completely replaced by silica in high-performance car tires.…”

Section: Introductionmentioning

confidence: 99%

The behavior of natural rubber–epoxidized natural rubber–silica composites based on wet masterbatch technique

Wang

Liao

Zhong

et al. 2016

Natural rubber-epoxidized natural rubber-silica composites were prepared by the wet masterbatch technique and the traditional dry mixing method. Performances of the composites based on different preparation methods were investigated with a moving die rheometer, an electronic universal testing machine, a dynamic mechanical analyzer, a nuclear magnetic resonance crosslink density analyzer, a rubber processing analyzer (RPA), a scanning electron microscope (SEM), and a transmission electron microscope (TEM). The RPA, SEM, and TEM analyses indicated that silica has better dispersion, lower filler-filler interaction, and better filler-rubber interaction in compounds based on the wet masterbatch technique, leading to improvements in mechanical strength and the dynamic mechanical and compression properties of the composites. It also indicates that composites prepared by the wet masterbatch technique have shorter scorch time, faster curing velocity, and higher crosslink density. The composites prepared by the wet materbatch technique also have lower rolling resistance, which is an important property for their use as a green material for the tire industry.

“…In the last years, new silanes such as the bis(triethoxysilylpropyl) tetrasulfide (TESPT) and 3-octanoylthio-1-propyltriethoxysilane (NXT TM ) have been developed to obtain significant improvements in the dispersion of the silica particles in NR and SBR matrix. [11][12][13] The reaction between the silanol groups of the silica particles and the ethoxy groups of silane molecules takes place via condensation with loss of ethanol. This reaction causes, first, a change in the nature of the silica surface energy, the hydrophilic nature at the silica is transformed into hydrophobic particles with reactive groups on their surface that are able to interact with the rubber molecules.…”

Section: Introductionmentioning

confidence: 99%

Effect of oleyl amine on SBR compounds filled with silane modified silica

Valentín

Mora-Barrantes

Rodrı́guez

et al. 2006

The effect of oleyl amine on processing and physical properties of SBR compounds filled with silanesilica particles has been evaluated. Two different types of silane molecules have been used as coupling agents to minimize the silica-silica interactions and reduce the formation of secondary structures of silica, in addition with an increment in the filler-rubber interactions. Significant differences between those compounds have been found according with the silane structure. However, in both cases, the dynamic, rheological, and mechanical properties of the filled rubber compounds were improved after the incorporation of oleyl amine molecules. This fact could be related with the capacity of the amine molecules to interact with the free silanol groups of silane-modified silica forming an amine-modified silica complex, which reduces the hydrophilic nature of the silica surface.