NSE-study of fullerene-containing polymers

Stars of Poly(styrene) chains grafted to C-60 have been studied by SANS and NSE below glass transition (T-G similar to 94 C). In stars the arms are no t condensed at fullerene surface, spreading away from C-60-core. The intera ction between fullerene core and polymer chains slows down the beta -relaxa tion in arms at T = - 20 to + 70 degreesC < T-G, so their relaxation time a chieves of 10-60 <mu>s (an order of magnitude higher than in free PS-chains ). Together with slow processes in stars and PS we also observed a fast osc illation (periods similar to 1 ns) of correlation function (delta -relaxati on). The dynamic model for these stretched oscillations is proposed. (C) 20 01 Elsevier Science B,V. All rights reserved.