THE MECHANISM OF THE DEVELOPMENT OF CUS-P OLYMER NANOCOMPOSITIONS BY IN-SITU REACTION

The procedure for the preparation of the film polymer nanocompositions containing semiconductive filler CuS as particles with mean dimension s of similar to 10-20 nm and a degree of filling up to similar to 150 wt % (with respect to polymer) was worked out. The compositions were p repared by in situ reactions in the bulk of the swollen polymer matric es based on PVA (film-forming component) and poly(acrylic acid) or pol y(ethylenimine) (complex-forming components). This approach is based o n the repeated treatment of water-swollen polymer matrix with the aque ous solutions of transition-metal salts (CuSO4) and Na2S. The First st age involves the sorption of transition-metal ions (Cu2+) by the sampl e and the formation of rather strong complexes between these ions and a complex-forming component of polymer matrix. At the second stage, fo rmation of the disperse phase of nanoparticles of transition metal sul fide (CuS) is observed.