A comparison of the properties of rice husk ash, silica, and calcium carbonate filled 75 : 25 NR/EPDM blends

作者：Arayapranee Wanvimon^*; Rempel Garry L

来源：Journal of Applied Polymer Science, 2008, 110(2): 1165-1174.

DOI：10.1002/app.28725

• natural ruuber
• EPDM
• blend
• rice husk ash
• silica
• calcium carbonate
• filler

The effects of incorporation of three different fillers, i.e., rice husk ash (RHA), silica, and calcium carbonate (CaCO(3)), over a loading range of 0-60 phr on the curing characteristics, processability, mechanical properties, and morphology of 75 : 25 natural rubber (NR)/ethylene-propylene-diene monomer (EPDM) blends were studied using a conventional vulcanization system. Filler loading and type influence the processability of the blends in which RHA and CaCO(3) offer better processing advantage over silica. The best improvement in the tensile and tear strength and abrasion resistance of the 75 : 25 NR/EPDM blends with additional fillers was achieved when filled with silica. However, RHA and CaCO(3) were better in resilience property compared to that of silica. The RHA filled blends showed higher failure properties and abrasion resistance but lower ozone resistance than that containing CaCO(3). Scanning electron mocrographs revealed that the morphology of the blend filled with silica is finer and more homogenous compared to the observations, RHA can be used as a cheaper filler to replace CaCO(3) in rubber blends where improved mechanical properties are not so critical.

• 出版日期2008-10-15