Living Anionic Polymerization of Benzofulvene in Hydrocarbon Solvent
Living Anionic Polymerization of Benzofulvene in Hydrocarbon Solvent
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DOI：
10.1002/masy.201400024
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发表时间：
2015-04
影响因子：
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通讯作者：
Yuki Kosaka;Raita Goseki;S. Kawauchi;Takashi Ishizone
中科院分区：
文献类型：
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作者：
Yuki Kosaka;Raita Goseki;S. Kawauchi;Takashi Ishizone
摘要苯并富烯(BF)与仲丁基锂在苯中于0∼55°C进行定量阴离子聚合，得到的聚(BF)S根据单体与引发剂的摩尔比和窄的分子量分布(MW/Mn<；1.1)预测了其相对分子质量。后聚合结果表明，聚(BF)的链端阴离子在0℃下在苯中至少稳定1h，异戊二烯和BF在苯中的阴离子顺序共聚也得到了定量产率较高的聚异戊二烯-b-聚(BF)。~(13)C核磁共振分析表明，在0°C下用仲丁基锂在苯中得到的聚(BF)具有76%的1，4-结构和24%的1，2-结构。
Summary Anionic polymerization of benzofulvene (BF) quantitatively proceeded with sec-BuLi in benzene at 0∼55 °C. The resulting poly(BF) s possessed predicted molecular weights based on the molar ratios between monomer and initiator and narrow molecular weight distributions (Mw/Mn < 1.1). The result of postpolymerization demonstrated that the propagating chain end anion of poly(BF) was stable in benzene at 0 °C for at least 1 h. Anionic sequential copolymerization of isoprene and BF was also performed in benzene to afford a well-defined polyisoprene-b-poly(BF) in quantitative yield. The 13C NMR analysis revealed that the poly(BF) obtained with sec-BuLi in benzene at 0 °C possessed 76% of the 1,4-structure and 24% of the 1,2-structure.