Effect of filler–filler interaction on rheological behaviour of natural rubber compounds filled with both carbon black and silica

Abstract

Rubber compounds are reinforced with fillers such as carbon black and silica. In general, filled rubber compounds show smooth rheological behaviour in measurement of Mooney viscosity or Mooney scorch time. Variation in rheological behaviour was studied in terms of the filler composition using natural rubber compounds filled with both carbon black and silica (carbon black/silica = 60/20,40/40, and 20/60 phr). The compound filled with carbon black/silica of 60/20 phr showed normal rheological behaviour. However, the compounds filled with carbon black/silica of 40/40 and 20/60 phr showed abnormal rheological behaviour, in which the viscosity increased suddenly and then decreased at a certain point during the measurement. The abnormal behaviour was explained by the strong filler–filler interaction of silica. Moreover, the abnormal rheological behaviour was displayed more clearly as the storage time of compounds is increased. © 2003 Society of Chemical Industry

Mechanical and morphological properties of fly ash/epoxy composites using conventional thermal and microwave curing methods

“…The decreases in these ultimate mechanical strengths of the composites were probably caused by an incompatibility of the ash particles and the epoxy matrix, leading to poor interfacial bonding. Specifically, it was found that the fly ash particles formed a cluster or agglomerate among themselves, resulting in a filler-filler interaction and a poor interfacial bonding, due to strong polarity of hydroxyl groups on the fly ash surfaces [40]. For the effect of curing system, it was observed that the tensile and flexural strengths for the MW cured composites were slightly higher than those for the CV cured composites [41].…”

Effects of Sericite Modified by Macromolecular Dispersant on the Thermal, Mechanical and Electrical Properties of the NR/SBR Composites

“…In Figure 1(c), the peak at 3622 cm −1 is assigned to the Si-OH group. For the modified sericite in Figure 1(b), the peak at 2920 cm −1 is attributed to the -CH 2 -and -CH 3 resonances corresponding to all carbons of the given structure, as shown in Figure 3. The 1 H-NMR and 13 C-NMR results further demonstrate that the synthesized product is terpolymer PEG-MA-AA, which is consistent with the FTIR results.…”

“…However, their mechanical and thermal properties should be improved for engineering applications. Many researchers have studied the fact that reinforcement by inorganic fillers enhances the physical properties of rubber (3,4). In recent years, the rubber/clay composites have received considerable attention, because adding some clay into the rubber can reduce costs and improve the comprehensive performance of the matrix (5)(6)(7)(8).…”

Experimental study of dielectric properties of composite materials pozzolan/DGEBA

“…Silicon alkoxide and silica can be used in sol–gel processes to synthesize organic/inorganic composites . Silica has also been successfully used to control the rheology of organic/inorganic hybrids, through research concerning storage modulus , shear thickening and thinning behavior , thixotropy, and yield point . In addition, silica particles can be used for reinforcement of polymer matrices to lower shrinkage on curing, to decrease the thermal expansion coefficients and to improve adhesion properties, mar (abrasion resistance) and corrosion resistances .…”