Synthesis of novel functional liquid and its application as a modifier in SBR/silica composites

Abstract

Abstract.A novel functional ionic liquid (IL), 1-methylimidazolium methacrylate (MimMa), was synthesized for modifying styrene butadiene rubber (SBR)/silica composites. MimMa was found to be readily polymerized via the initiated radical mechanism and could be analogously grafted onto rubber chains during vulcanization. Substantial hydrogen bonding between polymerized MimMa (poly(MimMa)) and silica can facilitate the silica dispersion and improve the SBR/silica interfacial bonding. Filler networking, curing behavior, silica dispersion and mechanical performance of the modified SBR/silica composites were studied. With a low concentration of MimMa, remarkable improvements in the interfacial interactions and mechanical properties were achieved which was attributed to the improved silica dispersion and strengthened interfacial bonding induced by MimMa. A modified interphase structure was accordingly proposed and related to the mechanical performance of the modified SBR/silica composites.

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

“…For example, 1-methylimidazolium methacrylate (MimMa) was used to modify the silica surface to increase the interfacial interactions between filler and SBR. Hydrogen bonding between silica particles and the ionic unit of MimMa were confirmed [11]. Moreover, the graft copolymerization of MimMa onto elastomer chains during the vulcanization process was responsible for the reactivity of ionic liquid towards SBR.…”

“…Generally, a silane coupling agent is used to increase the interaction between the nonpolar elastomer and the highly polar silica used as filler. In this case, ILs can adsorb on the filler surface, as postulated in the literature [11] and increase the interphase interactions between the elastomer and filler. It is known that during vulcanization, accelerators adsorb on the filler's surface, decreasing the efficiency of vulcanization.…”

“…ILs have excellent ionic conductivity up to their decomposition temperature, which enables them to play an important role in electrolyte matrices [6,9,10]. Recently, ILs have been widely used to improve the degree of dispersion of nanoparticles in polymers, particularly in elastomers [11][12][13]. For example, 1-allyl-3-methylimidazolium chloride (AMICl) was applied to improve the dispersion of carbon black particles in elastomers.…”

Ionic Liquids Applied to Improve the Dispersion of Coagent Particles in an Elastomer

“…Elastomer composites with this type of morphology should reveal the ability to relax stress upon external deformation of the sample. The ability of imidazolium salts containing vinyl groups covalently introduced on IL cation or anion moieties to facilitate polymerization has been confirmed [19,20]. Moreover, its application was shown to improve silica dispersions in elastomers and the mechanical performance of the vulcanizates.…”

Effect of ionic liquids on the dispersion of zinc oxide and silica nanoparticles, vulcanisation behaviour and properties of NBR composites

“…1-Methylimidazolidine methacrylate salt (MimMa) was found to polymerise via a radical-initiated mechanism and was easily grafted onto SBR chains during vulcanisation [18]. Substantial hydrogen bonding between polymerised MimMa and silica facilitated the dispersion of silica in the elastomer and improved the interfacial interactions between SBR and silica particles.…”