A reliable method for the anionic synthesis of block copolymers from polystyrene and polymethylphenylsiloxane is reported. Analysis of the block copolymers by h.p.l.c, proved the absence of homopolymer. The evaluation of g.p.c, measurements demonstrated that the copolymers exhibit a narrow molecular weight distribution (M,/M, <~ 1.1). Depending on molecular weight and composition the copolymers are homogeneous or undergo microphase separation.
Посилання на статтю:
Synthesis and characterization of narrowly distributed block copolymers from polystyrene and polymethylphenylsiloxane / B. Gerharz*, Th. Wagner, M. Ballaufft and E. W. Fischer // Polymer. – 1992. – Vol 33. – P. 3531-3535.