부산대학교 도서관

This work is to develop a novel polymerization based on the reversible activation of a C-H bond, whose selective activation with metal catalysts has been considered difficult. Thus, acrylonitrile (AN) was polymerized in conjunction with ethyl cyanoacetate (ECA; initiator) and ruthenium complex [RuH2(PPh3)4 (1); catalyst] in DMF at 100°C. The polymerization proceeded and gave PAN with a relatively high molecular weight (Mn ∼ 7100) and a broad molecular weight distribution (Mw/Mn ∼ 1.6). 1H NMR analysis revealed the ECA fragment was attached to the obtained PAN, which indicates that this polymerization is based on the reversible activation of C-H bond, though fine control is still unattained. Similar polymerizations of methacrylonitrile and methyl acrylate were also examined.