Preparation, Structure and Properties of 50/50 NR/BR Blend/ Clay Nanocomposites

Rubber blend/clay nanocomposites of 50/50 (wt %) natural rubber/ butadiene rubber was prepared via mixing the latex of 50/50 NR/BR blend with an aqueous clay dispersion and cocoagulating the mixture. TEM and XRD were applied to characterize structure of the nanocomposites. It was found that fully exfoliated structure could be obtained by this method only when the low loading of layered silicate (up to 5 phr) is used. With increasing the clay content, both non-exfoliated (stacked layers) and exfoliated structures can be observed simultaneously in the nanocomposites. The mechanical results on the vulcanizednanocomposites showed that nanocomposites present initial moduli and tensile trength higher than Na-MMT free NR/BR volcanizate. Furthermore, initial moduli increased with increasing the Na-MMT loading, indicating the reinforcement effect of Na-MMT on the mechanical properties of nanocomposites.

کلیدواژه ها:

Nanocomposite ، NR/BR Blend ، Sodium Montmorillointe ، Mechanical Properties