芳香族ビニルモノマーのリビングラジカル重合による多分岐高分子の合成
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概要
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Synthesis of hyper branched polymer was studied by two step living radical polymerization to attain the high refractive index and low birefringence of polymer for optical use. At first step,polystyrene endcapped with 2,2,6,6-tetramethyl piperidinyl-1-oxy(PS-TEMPO)was prepared using azobisisobutyronitrile as initiator in the presence of TEMPO at 80℃ in bulk. At second step, styrene was copolymerized with divinylbenzene as branching agent using above obtained PS-TEMPO as the initiator at 120℃. It was suggested that the gelation was retarded using PS-TEMPO with narrow molecular weight distribution. High molecular weight and highly branched polymer structure was supposed by GPC and NMR analysis.
- 八戸工業高等専門学校の論文