Adsorption of curatives and activity of silica toward elastomers

Abstract

To characterize an activity of silica toward elastomers usually the parameters of the filler structure and a possibility of its interactions with macromolecules of a matrix are taken into consideration [1,2,3]. As a rule, low molecular weight substances of different polarity are dissolved in a rubber mix (e.g. accelerators, activators, crosslinking substances, etc). They undergo adsorption on the surface of active fillers what exerts an effect on a structure of a network formed and influences mechanical properties of vulcanizates at the same time.

Effect of imidazolium ionic liquid type on the properties of nitrile rubber composites

“…A similar effect is also observed during vulcanization, during which the sulfur crosslinking system is usually adsorbed on the silica surface which results in slower vulcanization in comparison to the crosslink kinetics of unfilled NBR. 42 T g values based on the DSC measurements are in good agreement with those obtained from DMA. The values of T g obtained from DMA and DSC are different because these techniques have different principles of measurement.…”

“…In contrast to MgAl‐LDH, silica A380 is characterized by a large specific surface area of 380 m 2 g −1 on which the IL is most likely immobilized or adhered, which may hinder the plasticizing effect. A similar effect is also observed during vulcanization, during which the sulfur crosslinking system is usually adsorbed on the silica surface which results in slower vulcanization in comparison to the crosslink kinetics of unfilled NBR …”

Carboxylated butadiene–styrene rubber/halloysite nanotube nanocomposites: Interfacial interaction and performance

“…Generally, natural silicate is a class of mesoporous materials, which tend to absorb organics via different mechanism such as acid-base interaction, hydrogen bonding or charge transfer, etc. [38][39][40]. The delayed vulcanization of rubber by silicate such as kaolinite and montmorillonite has been widely reported.…”

Synergistic Effect of Small Molecules on Large-Scale Structure of Simplified Industrial Nanocomposites

“…DPG therefore preferentially adsorbs on the (untreated) silica, preventing by this way the formation of hydrogen bonds between hydroxyl groups of different nanoparticles. 47,48 Note that the number density of silanol groups on silica has been shown to be correlated with the aggregate size in SBR nanocomposites. 49 Comparison between the structural results with DPG only and octeo only further indicates that the efficiency of the coating agent alone is not optimal.…”