Influence of compounding and mixing on filler dispersion and curing behavior of silica compounds

Jin, Jungmin

doi:10.3990/1.9789036549264

Cited by 3 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whereas the nonmodified silica exhibits high surface energy that might bind the rubber macromolecules by facilitating a high value of work of adhesion between the silica and rubber, 9 possibly stemming from inducing local dipoles on rubber macromolecules that interact with the polar silica surface. Also, due to high filler-filler interactions of the silica particles, a considerable amount of occluded rubber is formed that could contribute to the hydrodynamic effect 10 or be released at high strain, increasing the G 0 value. Branching of the oligomers results in a very significant improvement of the interactions with rubber in comparison with the non-branched oligomer.…”

Section: Resultsmentioning

confidence: 99%

Velcro-Inspired Supramolecular System for Silica–rubber Coupling

Anyszka

Beton

Szczechowicz

et al. 2020

Rubber Chemistry and Technology

View full text Add to dashboard Cite

The state-of-the-art silica–rubber coupling is based on forming chemical links between a silica surface and rubber macromolecules. However, the chemical links are relatively short and stiff, thus in case of a chemical breakage they are highly unlikely to recombine. This could result in a potential deterioration of the interphase properties over time. To overcome this drawback, a new approach to silica–rubber coupling was investigated in the current study. The new approach is inspired by the Velcro hook-and-loop system from nature that facilitates a re-connectability, thus re-formation of the interphase properties in case of a breakage. For this, various long oligomeric brushes were grafted onto silica surfaces considered to act as supramolecular hooks. Such modified silica were dispersed in rubber and vulcanized. The resulting cross-linked rubber matrix is considered to act as supramolecular loops. The prepared vulcanizates were compared with reference samples containing common coupling or covering agents. The reinforcing potential provided by the newly developed system is lower than the chemical coupling system but considerably higher than the covering system. The new system also provides better mechanical properties, recovery after cycling stretching, and heat treatment than the references. A new reinforcing mechanism is proposed for the silica grafted with oligomeric brushes that exhibits a good chemical compatibility to the rubber matrix.

show abstract

Section: Resultsmentioning

confidence: 99%

Velcro-Inspired Supramolecular System for Silica–rubber Coupling

Anyszka

Beton

Szczechowicz

et al. 2020

Rubber Chemistry and Technology

View full text Add to dashboard Cite

show abstract

“…Luginsland [19] reported that the coupling reactivity of silane-rubber increased as the sulfur chain length of sulfide-silane increased. Hasse et al [9] studied the coupling efficiency of an unfilled liquid polybutadiene matrix and (bis(triethoxysilylpropyl)disulfide) [TESPD] and confirmed that elemental sulfur was inserted into sulfide in the TESPD, where the coupling efficiency increased as the elemental sulfur content increased [20]. Furthermore, they proposed that the mechanism of sulfur insertion into the sulfide-silane was consistent with the well-known ZnO/CBS-accelerated vulcanization mechanism.…”

Section: Introductionmentioning

confidence: 89%

Effect of Sulfur Variation on the Vulcanizate Structure of Silica-Filled Styrene-Butadiene Rubber Compounds with a Sulfide–Silane Coupling Agent

Han

Gu²,

Kim³

et al. 2020

Polymers

View full text Add to dashboard Cite

The vulcanizate structure of filled compounds is affected by filler–rubber interactions (FRI) and the chemical crosslink density (CCD) of the matrix rubber. In particular, in filled compounds using a silica–silane system, FRIs due to silica–rubber coupling are a major influencing factor for the vulcanizate structure and physical properties. In this study, the effect of sulfur variation on the vulcanizate structure of silica-filled solution styrene–butadiene rubber compounds using a sulfide–silane coupling agent was studied. The vulcanizate structure according to sulfur variation was quantitatively analyzed using the swelling test and Flory–Rehner and Kraus equations. As the sulfur content increased, both FRI and the CCD increased, and it was confirmed that sulfur variation influenced the silica–rubber coupling efficiency through increased FRI. In addition, field emission scanning electron microscope images showed that increased FRI contributed to improvements in silica dispersion, abrasion resistance, and energy loss characteristics.

show abstract

Influence of the number of end-chain amine-functionalized arms of star-shaped functionalized SBR

Yamada,

Yasumoto,

Blume

2024

Polym. Bull.

View full text Add to dashboard Cite

Star-shaped SBRs with alkoxy silyl groups in the center of the molecule and amine groups at the polymer chain ends were prepared. The number of arms were varied, and its influence on the silica/silane-filled compound properties was investigated. The polymer–filler interactions and the filler–filler interactions were evaluated from the viscoelastic properties. The flocculation, tensile properties and tanδ at 60 °C, an indicator of rolling resistance, were investigated as well. The polymer–filler interactions were increased in the SBR with a higher number of arms due to the higher amount of amine groups in these SBRs. The Payne effect was slightly increased with a higher number of arms. This indicates a deteriorated micro-dispersion of the silica caused by too many interactions generated by the higher amount of amine groups in SBR. These high interactions due to the amine groups lead to higher tensile moduli. The combination of the higher polymer–filler interactions and the higher Payne effect in SBR with a high number of arms results in the same tanδ compared to the SBR with a low number of arms.

show abstract

Influence of compounding and mixing on filler dispersion and curing behavior of silica compounds

Abstract: stored in a retrieval system or transmitted in any form or by any means without permission of the author. Alle rechten voorbehouden. Niets uit deze uitgave mag worden vermenigvuldigd, in enige vorm of op enige wijze, zonder voorafgaande schriftelijke toestemming van de auteur.

Cited by 3 publications

References 46 publications

Velcro-Inspired Supramolecular System for Silica–rubber Coupling

Velcro-Inspired Supramolecular System for Silica–rubber Coupling

Effect of Sulfur Variation on the Vulcanizate Structure of Silica-Filled Styrene-Butadiene Rubber Compounds with a Sulfide–Silane Coupling Agent

Influence of the number of end-chain amine-functionalized arms of star-shaped functionalized SBR

Contact Info

Product

Resources

About