Abstract
AbstractThe aim of the present study was to examine effects of black liquor-montmorillonite (BL-Mnt) complexes on the mechanical and thermal properties of epichlorohydrin rubber. Considering the stability effect of lignin and the barrier property of clay minerals, a significant enhancement of thermo-oxidative aging properties of ECO/BL-Mnt composites was expected. Poly (epichlorohydrin-co-ethylene oxide) (ECO) composites filled with BL-Mnt complex were prepared by mechanical mixing on a two-roll mill. The ECO/BL-Mnt composites were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). Both XRD and TEM data showed that the filler particles were well dispersed throughout the ECO/BL-Mnt composites. The tensile strength, elongation at break, and 100% modulus of the rubber composite were 14.0 MPa, 457%, and 3.9 MPa, respectively, at a 50% loading of BL-Mnt. The retention of tensile strength was 99% after thermal oxidative aging in an air-circulating oven for 72 h at 100°C. Evidence indicated that ECO/BL-Mnt composites with good mechanical properties and thermo-oxidative aging properties were obtained.
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