Covalent incorporation of [70]fullerene into poly(p-methylstyrene) by anionic copolymerization

A soluble non-crosslinked C-70-p-methylstyrene (C-70-PMS) copolymer was pre pared in sodium naphthalene-initiated anionic polymerization reaction. This copolymer exhibits the lower intrinsic viscosity and higher absolute molec ular weight compared with linear polystyrene at equal retention time, sugge sting that the copolymer possess star-shaped structure. The covalent grafti ngs of multiple poly (p-methylstyrene) (PPMS) chains onto the C-70 core res ult ill the math-ed enhancement of the absorption degree at longer waveleng ths, and in the increase of glass transition temperature. Like pure PPMS, C -70-PMS copolymer also exhibits the higher solvency in common solvents. (C) 2000 Elsevier Science Ltd. All rights reserved.