Effect of Alternative Fillers on the Properties of Rubber Compounds

Abstract

The paper is focused on the influence of alternative fillers on rubber compounds properties. Three different types of powder fillers, drinking water treatment sludge (DWTS), perlite and calcium carbonate, were mixed into rubber compound mixtures. The mixtures were composed of STR20, EPDM, zinc oxide, steric acid, paraffin wax, 2-mercaptobenzothiazole (MBT), sulphur, Wingstay L, and filler. The mixtures were mixed in a Kneader type mixer at temperature of 70°C and then continuously mixed using a two-roll mill at temperature of 70°C. The relationships between type and the amount of filler versus properties of rubber compounds were demonstrated. The results showed that tensile and elongation at break of rubber compounds gradually decreased with increasing the amount of filler. Rubber compounds filled with small particle size filler possessed higher tensile strength and elongation at break than those filled with large particle size filler. Values of DIN abrasion loss of rubber compounds prepared under proper mixing condition were not more than 300 mm3. Under appropriate condition, the rubber compounds with DWTS, perlite and calcium carbonate provided sufficiently high shore A hardness (not less than 50 Shore A hardness). Finally, alternative fillers such as DWTS and perlite were expected to replace calcium carbonate in normal formula.

Effects of replacing Carbon Black with Wood Fibers in wood-rubber composites

“…The hardness of a material is related to the amount of filler connections to the activators and accelerators, in this study, carbon black and wood fibers [9] . A greater number of fillers restricts the movement of the chain, making the composite more rigid, from there the composite becomes more resistant to penetrating forces.…”

“…There are several papers reporting good responses to the addition of lignocellulosic fibers in the formulation of the rubber composite [6] : nanocellulose [9] , different fillers [10] , sugarcane bagasse [11] , jute fibers [12] , cereal straw. However, there are few reports about the replacement of CB by these fibers and the physical-mechanical behavior of the composite.…”

Effect of Silane Coupling Agents on the Rheology, Dynamic and Mechanical Properties of Ethylene Propylene Diene Rubber/Calcium Carbonate Composites

“…The research on EPDM/CaCO 3 composites mainly focuses on improving impact toughness, such as PP/EPDM/Nano-CaCO 3 composites [10,11], HDPE/EPDM/CaCO 3 composites [12] and the reinforcement effect of MAA on nano-CaCO 3 -filled EPDM vulcanizates [2]. There are few studies on the combination of EPDM/CaCO 3 exclusively [13,14]. The main reason is because calcium carbonate did not have a reinforcing effect in EPDM; the different surface or interfacial properties between calcium carbonate and the matrix [15] always resulted in a low bond strength between the filler and the rubber [16].…”

Influence of Preparation Method on Properties of Natural Rubber/Sepiolite Composites

“…Interest in searching alternative fillers for rubber has been increasing recently. Many alternative fillers have been incorporated into the rubber including lignin, sludge and so forth [5][6][7]. Sepiolite is one of the example of alternative fillers being given special attention.…”