Ethylene → Methyl Methacrylate

Participants

Reaction Steps

0.88 g (terminal Br: 0.05 mmol) of 2-bromoisobutyryl group-modified PE and 8.25 g (5.0 mmol) of EPR macromonomer obtained in (1) above were introduced into a 30-ml Shrenk flask substituted under vacuum with nitrogen, and then subjected 5 times to degassing and substitution with nitrogen by means of a vacuum pump. 7.3 mg (0.05 mmol) of CuBr(I), 5.0 ml of o-xylene, 0.20 ml (0.10 mmol) of 0.5M solution of N,N,N′,N″,N″-pentamethyldiethylenetriamine (PMDETA) in o-xylene, and 0.53 ml (5.0 mmol) of methyl methacrylate (MMA) were successively added thereto in a nitrogen stream, and the flask was fit with a septum cap. The temperature of the mixture was increased to 120° C., and the mixture was reacted for 5 hours under stirring. After the Shrenk flask was cooled with iced water, the reaction was terminated by adding about 5 ml of methanol, and the reaction mixture was poured into 400 ml of methanol and stirred overnight. The precipitated polymer was separated by filtration with a glass filter, and the polymer was dried at 80° C. for 10 hours under reduced conditions at 15 Torr to give 0.86 g polymer. 1H-NMR measurement indicated that a PE-b-(MMA-g-EPR) block polymer of ethylene:propylene:MMA=60:28:12 (mol %) was obtained.

Provenance & Evidence