Preparation and performance of oleylamine modified silica‐reinforced natural rubber composites

Abstract

Oleylamine (OA) modified silica (SiO 2-g-OA) was prepared using γ-(2,3-epoxypropoxy) propytrimethoxysilane (KH560) and OA, silica/natural rubber (NR) and SiO 2-g-OA/NR composites were prepared by mechanical blending in an internal mixer, and SiO 2-g-OA was characterized by Fourier transform infrared spectroscopy, thermal gravimetric analyzer, and contact angle analyzer. The mechanical properties, abrasion resistance, curing characteristics, Payne effect, and morphology of silica/NR and SiO 2-g-OA /NR composites were investigated using universal testing machine, Akron abrasion tester, rubber processing analyzer, and scanning electron microscope, respectively. The results showed that SiO 2-g-OA became more hydrophobic and had better compatibility with NR. Moreover, SiO 2-g-OA/NR had weaker Payne effect, better vulcanization performance, and more excellent mechanical properties. As the content of filler was more than 30 phr, SiO 2-g-OA/NR had lower rolling resistance and higher wet skid resistance. Compared with silica modified by other coupling agents, SiO 2-g-OA had the best reinforcement effect on NR.

Preparation of Poly(acrylic acid-co-acrylamide)-Grafted Deproteinized Natural Rubber and Its Effect on the Properties of Natural Rubber/Silica Composites

“…The M L is related to the viscosity of the rubber compounds. The increase in M L was probably due to the PAA- co -PAM chains and the rigid silica particles restricting the motion of the rubber chains [ 64 ]. Moreover, the delta torque (M H -M L ) of the (PAA- co -PAM)-DPNR was higher than that of the DPNR, and the addition of silica presented an increase in the delta torque.…”

Recent progress of elastomer–silica nanocomposites toward green tires: simulation and experiment

“…Besides, the chemical interfacial interaction also endows the nanocomposite with thermal stability, avoiding a sharp fall of mechanical strength with increasing temperature. Silane coupling agents, such as silane with C C bond, 65,66 silane with a sulfhydryl group [67][68][69] and silane with a polysulfide bond, 70,71 are the most adopted modification reagents. Obviously, the modification process significantly enhances the interfacial interaction between silica and rubber matrices.…”

Effects of β‐dextranase in raw natural rubber on the interface and performance of natural rubber/silica composites via simulation with an outer same protein

“…Finally, the energy loss of the resultant composites was remarkably decreased. Mei et al 8 reported a way to modify silica via using oleylamine and γ‐(2,3‐epoxypropoxy) propytrimethoxysilane (KH560), and the results demonstrated the lower rolling resistance and better mechanical properties of NR/silica composite were obtained. Others about the hybrid fillers, 9 graft of CB by hyperbranched polymer, 10 polyethylene glycol, 11 and wet masterbatch technology 12 had been mentioned before.…”