The living character of the anionic polymerization of t-butyl methacrylate (BMA) using 2,3- diphenylbutadienemagnesium (DPB-Mg) as a bifunctional initiator was investigated by varying the polymerization conditions. Anionic polymerization of BMA at both - 78 and - 45°C involved no transfer reaction and the molecular weight distribution ofpoly(t-butyl methacrylate) was very narrow (Mw/M . = 1.20). However, the polymerization at 0°C involved a small amount of side reaction, i.e. attack of the living ends of the ester molecules. The structure of the DPB-Mg complex was characterized by spectroscopic analysis and quantitative titration of Mg metal.
Посилання на статтю:
Anionic polymerization of t-butyl methacrylate using a new type of bifunctional initiator / Koji Ishizu and Yoshiharu Kondo and Mikio Takaki // Polymer. – 1993. – Vol 34. – P. 4347-4351.