Utilization of silane functionalized carbon nanotubes‐silica hybrids as novel reinforcing fillers for solution styrene butadiene rubber

Abstract

Carbon nanotubes-silica (CNTs-SiO2) nanohybrid filler was fabricated by coating inorganic silica on multi-wall CNTs through a sol-gel process. The CNTs-SiO2 nanohybrids were then functionalized by 3-methacryloxypropyltrimethoxysilane (3-MPTS) followed by compounding to solution styrene butadiene rubber (S-SBR) through mechanical mixing. The Fourier-transform infrared spectroscopy showed that the CNTs were coated by inorganic SiO2, and grafted with 3-MPTS successfully. The functionalized CNTs-SiO2 nanohybrids had a rough surface as revealed by transmission electron microscope images. After hybridization and grafting, the functionalized CNTs-SiO2 nanohybrids still maintained the crystal structure of CNTs, which was determined by X-ray diffraction and Raman spectrum. The addition of nanohybrids accelerated the vulcanization process and improved the crosslinking degree of vulcanizates. With adding 10 phr (parts per hundred of rubber) functionalized CNTs-SiO2, the mechanical properties of S-SBR vulcanizates were improved significantly. The tensile moduli at 100% elongation (M100) and tensile strength had 54% and 28% increase, respectively. The incorporation of functionalized CNTs-SiO2 nanohybrids also largely enhanced the storage modulus, and slightly increased the thermal conductivity of vulcanizates. © 2013 Society of Plastics Engineers

Impact of various oxidation degrees of graphene oxide on the performance of styrene–butadiene rubber nanocomposites

“…The results suggest that GO9 has a much great effect on the enhancement of viscosity and modulus of nanocomposites. In addition, SG9 shows relatively highest value of Δ S , which indicates the greatest crosslink degree . It should be mentioned that in the case of GO with higher oxidation degrees, the more oxygen groups can restrain the crosslink density through absorbing accelerator, which results in the lower Δ S of SG15 and SG21 compared with SG9 .…”

Impacts of filler covalent and non‐covalent modification on the network structure and mechanical properties of carbon–silica dual phase filler/natural rubber

“…As M L reflects the compound viscosity, the results suggest that the modifier AMI has a much greater effect on the decrease of viscosity of compound. In the case of Δ S , the AMI‐CSDPF/NR compound shows relatively the higher value of Δ S , which indicates the greater crosslinked degree . It is contributed to the catalytic effect of AMI on the interface crosslinking reaction .…”

“…It can be seen that the t 10 and the t 90 of the modified CSDPF/NR compounds are shorter than those of pristine CSDPF/NR compound, while the CRI of modified CSDPF/NR compounds is larger. Due to the presence of hydroxyl groups on the CSDPF, which has been proven to be able to delay the vulcanization through absorbing some accelerator, the CRI of pristine CSDPF/NR compound is the lowest among the three rubber compounds studied. After the modification of CSDPF, the absorption of cure agents by modified CSDPF is reduced.…”

“…Rubbers are of great industrial importance due to their high and reversible deformability. Recently, rubber nano‐composites with nano‐fillers have exhibited excellent mechanical properties as well as outstanding thermal conductivity compared with the conventional rubber vulcanizates . Nevertheless, there are still issues to be addressed before nano‐fillers find wide applications.…”

Dynamic properties of star‐shaped, solution‐polymerized styrene–butadiene rubber and its cocoagulated rubber‐filled with silica/carbon black

“…This result indicates that the use of N‐SSBR prepared through the cocoagulation method as the matrix had the remarkable advantages of flex fatigue resistance and flex fatigue crack‐growth resistance when the silica content was high. The reason was that the strong interfacial interaction between the filler and rubber and the good filler dispersion in the N series of nanocomposites helped to dissipate the accumulative energy produced during the cyclic deformation and slow down the growth of the initial cracks. Finally, the initial cracks only extended along the relatively weaker interfaces generated in the process of repeated dynamic deformation.…”