Promoted dispersion of silica and interfacial strength in rubber/silica composites by grafting with oniums

Abstract

The dispersion of filler and interfacial interaction are crucial in determining the properties of rubber composites. Aiming to improve the dispersion and filler-rubber interaction, we introduce rubber graft bearing oniums in a rubber/silica composite. To fulfill this goal, the graft, which is prepared via thio-ene click reaction between 1-methylimidazolium mercaptopropionate (MMP) and the pendent vinyl groups of a solution-polymerized styrene-butadiene rubber (SSBR), is introduced into the silica-filled styrene-butadiene rubber (SBR) composite. The dispersion of silica and interfacial interaction are improved via hydrogen bonding interaction. Moreover, the graft exhibits catalytic effect toward the silanization, which can improve interfacial interaction in the composites with bis [3-(triethoxysilyl) propyl] tetrasulfide. With 2 phr of the graft, the tensile modulus (stress at 300% strain) is increased by 18% and the abrasion loss is decreased by 31%. This study opens a new attempt to improve the filler dispersion and filler-rubber interaction in the composites with onium-bearing polymers.

The effect of silica modified by deep eutectic solvents on the properties of nature rubber/silica composites

“…24 At the same time, the loss peak area can indicate the interaction between fillers. 8,25 The peak area shows a decreasing trend with strength of the interaction between rubber and filler. The dependences of tan δ on temperature for the NR-DESx are shown in Figure 3(a).…”

“…Ionic liquids have also attracted people’s attention due to their good physical and chemical properties. 6–8 Du et al 9 studied the effect of a kind of ionic liquid, 1-butyl-3-methylimidazoliumtetrafluoroborate (BMI), on the properties of silica reinforced styrene-butadiene rubber (SBR). The results show that the ionic liquid can effectively improve the dispersion of silica in SBR, and can also improve the mechanical properties, wear resistance of the composites, the rolling resistance, and wet skid resistance of SBR.…”

Preparation and Characterization of Diene Rubbers/Silica Composites via Reactions of Hydroxyl Groups and Blocked Polyisocyanates

“…A silane coupling agent is confirmed to be capable of improving the dispersion of silica in rubber significantly, but the need of additional high-temperature treatment increases the complexity of processing [30]. It has been very recently demonstrated that intra-chain functional groups in rubber can effectively improve the dispersion of silica through polar interaction or chemical connection [31][32][33].…”

Functionalized Nanosilica for Vulcanization Efficiency and Mechanical Properties of Natural Rubber Composites

“…Wang et al [14] developed surface modified silica nanoparticles by combining noncovalent and covalent modification processes in a simple, efficient and costeffective method. Weng et al [15] developed a new way to promote the dispersion of silica and interfacial strength in rubber/silica composites by grafting with oniums. Liu et al [16] established a simple inhibition-grafting method to prepare silica/polydimethylsiloxane nanocomposites with superior mechanical properties and a low viscosity.…”