Reinforcing styrene‐butadiene rubber composites by constructing multiple interaction between rubber and silica

Abstract

Reinforcing rubber is of great significance in material science and engineering. In this work, a kind of ionic liquid, 1‐allyl‐3‐methyl‐imidazolium chloride (AMI) was used as compatibilizer in styrene‐butadiene rubber (SBR)/silica composites. AMI and bis(3‐triethoxysilylpropyl)‐tetrasulfide (TESPT) were used together to construct multiple interactions of covalent bonds, cation–pi interaction as well as hydrogen bonds between silica and SBR chains. After introducing TESPT and AMI, vulcanization rate of SBR/silica composites and crosslink density of the rubber vulcanizates increased obviously. Moreover, better dispersion of silica in SBR matrix as well as stronger interaction between silica and SBR chains was achieved. Additionally, the mechanical properties of rubber vulcanizates were improved remarkably compared with the vulcanizates with TESPT or AMI individually. When compared with only introducing one kind of interaction between silica and SBR to reinforce SBR/silica composites, this work of constructing multiple interactions between silica and SBR is of valuable reference in preparing high‐performance rubber/silica composites. POLYM. COMPOS., 40:1740–1747, 2019. © 2018 Society of Plastics Engineers

A modus operandi toward interfacial enhancement of ethylene propylene diene monomer rubber/ polybenzoxazine blends using EPDM‐grafted‐vinyltrimethoxysilane copolymer

“…Similar findings have been reported by many researchers in their studies on thermoplastic elastomer blends. [ 41,42 ] Focusing on the examined samples, maximum tensile strength (14.5 MPa) was obtained with a compatibilized samples, when compared to peak 12 MPa tensile strength that was achieved with non‐compatibilized one at a blending ratio of 50/50. Accordingly, one can conclude that the incorporation of the EPDM‐g‐VTMS was not efficient at higher resin contents.…”

Comparative study on the effects of silica size and dispersion mode on the fire retardancy of extruded wood fiber/HDPE composites

“…The WPCs filled with nano‐SiO 2 via dry and wet dispersion exhibited a higher storage modulus than the unfilled WPCs due to the nano‐size effect, namely the large surface area of nano‐SiO 2 that hindered the chain relaxation of HDPE (Figure 13B,D). [ 39 ] The storage modulus of SiO 2 ‐filled WPCs via wet dispersion was higher than that via dry dispersion (Figure 13D,B). This was because the homogeneous dispersion and strong interface bonding of nano‐SiO 2 in HDPE facilitated the efficient transfer of stress from WPCs to nano‐SiO 2 , which fully exerted the rigidity of nano‐SiO 2 .…”

A novel material based on deep eutectic solvents and its application in in‐situ modified silica‐reinforced styrene‐butadiene rubber

“…And accompanied by DESs, the weight loss of silica-TD increased a lot, indicating that TESPT and DESs had a synergistic effect in improving the surface property of silica. 13…”

“…But when the amount of DESs was excess, it would deteriorate the dispersity of silica in the rubber matrix. 13,32,33 We know that the value of minimum torque (M L ) could indicate the dispersity of silica, and the maximum torque (M H ) represents the degree of cross-linking. As shown in Table 2, comparing with the R/S compound, on one aspect, M L for R/S-T, R/S-D-x, and R/S-TD-x compounds were declined.…”

“…AMI and TESPT constructed multiple interactions between silica and SBR molecular chains (e.g., covalent bonds, cation-pi interaction, and hydrogen bonds), which improved the dispersity of silica in the SBR matrix and strengthened the interaction between silica and SBR chains. 13 But the ionic liquids (ILs) are harmful to the ecological environment due to their not good biodegradability and comparatively high solubilities in water. Meanwhile, the price is high.…”