A novel elastomeric polyurethane／clay (PU／Clay) nanocomposite based on poly(propylene glycol)

glycerol propoxylate and toluene-diisocyanate were synthesized by intercalative polymerization technology．The results of X-ray diffraction study showed that the gallery distance of the clay was enlarged from l.9nm to 4.5 nm or more．Introducing about 7.5 wt％ clay in the composites resulted in／more than two-fold increase in the tensile strength and five-fold increase in the elongation at break as compared to those of the pure PU．Additionally

the thermal stability of the PU/Clay nanocomposites was also studied by TGA analysis．The thermal stability of the nanocomposites was increased sightly in comparing with the pure PU．