Nanoparticles of 1 were added (0.25 and 0.5% by mass) to epsilon-caprolactam to modify its thermal and mech. properties and structure of the reinforced poly-e-caprolactam nano composites. The addn. of 1 resulted in decrease of anionic polymerization rate of e-caprolactam and crystn. of the composite. [GRAPHICS] .