The Comparison of Alkanolamide and Silane Coupling Agent on the Properties of Silica-filled Natural Rubber (SMR-L) Compounds
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Alkanolamide (ALK) and Aminopropyltriethoxy Silane (APTES) were incorporated separately into silica-filled SMR-L compounds at 1.0, 3.0, 5.0 and 7.0 phr. It was found that compounds with both ALK and APTES exhibited cure enhancement, better filler dispersion and greater rubber-filler interaction. Both additives also produced modulus and tensile enhancements in the silica-filled SMR-L compounds, especially up to a 5.0 phr loading. At a similar loading, ALK exhibited higher reinforcing efficiency of silica than APTES.