Modified silica-based isoprene rubber composite by a multi -functional silane: Preparation and its mechanical and dynamic mechanical properties

Modified silica-based isoprene rubber (IR) composite has been designed and prepared by using a multi-functional silane, 2-aminoethyl 2-(3-triethoxysilylpropyl)aminoethyl disulfide (ATD), as coupling agent. Such modification significantly improved the dispersity of silica in the corresponding composites, as verified by SEM observation. And the hardness, tensile strength, stress at definite elongation, tear strength and temperature rise as well as the value of dynamic loss coefficient ranging from 0 degrees C to 80 degrees C of silica/IR vulcanized composites, are significantly improved, especially with low ATD dosage (2-4 phr). This modification of silica-based IR composite by employing ATD as coupling agent provides a facile and effective method to prepare silica-based rubber composites with improved mechanical properties and low hysteresis.