Using the methods of thermal twin roller mixing, the OMMT/ HNBR rubber were prepared. The dispersion
of OMMT in HNBR was enhanced by the preparations, thus good properties of HNBR were obtained. The results
of SAXS, SEM and TEM showed that the OMMT layers were intercalated in the HNBR matrix and formed a few
aggregations. DSC plots and cold-resistance coefficient results displayed that the addition of OMMT is not restricted
the chain segment motions of HNBR, but increased the density of filler networks which thus improved their low-temperature
elasticity. By the addition of OMMT into HNBR, the mechanical properties of nanocomposites increased.
However, when the content of OMMT was beyond 10 phr, the amount of their aggregations increased and thus the mechanical
properties slowly improved. DMA measurements showed that there are strong interfaces between HNBR and
OMMT which lead to high mechanical properties of HNBR. In contrast with pure HNBR, the incorporation of OMMT
is helpful to improve the oil-resistance of HNBR. Therefore, we believe that OMMT/ HNBR rubber is a high-performance
oil-sealing material at the low temperature.