MECHANISM FOR THE FORMATION OF CUS NANOPARTICLES BY IN-SITU REACTIONSIN POLY(ACRYLIC ACID) POLY(VINYL ALCOHOL) MATRIX

The mechanism for the formation of CuS nanoparticles by in situ reacti ons in the PAA-PVA polymer matrix was studied by UV-VIS and IR spectro scopy, X-ray diffraction, and gravimetry. As evidenced by kinetic stud ies, the formation of the CuS disperse phase involves the formation of S-containing copper complexes, associates, amorphous clusters, and Cu S crystal nanoparticles (similar to 4 nm). The high aggregate stabilit y of the nanocompositions is associated both with the structure of the mesophase layer and diffusion limitations in the reaction medium (swe lled polymer matrix).