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Polymerization of three cyclic ketene acetals: i.e., 5,6-benzo-2-methylene-1,3-dioxepane (BMDO), 2-methylene-4-phenyl-1,3-dioxolane (MPDO) and 4, 7-dimethyl-2-methylene-1, 3-dioxepane(DMMDO) were carried out in the presence ofethyl α-bromobutyrate/CuBr/2, 2’-bipyridine respectively. The structures of poly(BMDO), poly(MPDO) and poly(DMMDO)were characterized by ~1H and ~(13)C-NMR spectra. The effects of monomer structure on the behavior of atom transfer freeradical ring-opening polymerization were investigated and the mechanism of controlled free radical ring-openingpolymerization was discussed.
Polymerization of three cyclic ketene acetals: ie, 5,6-benzo-2-methylene-1,3-dioxepane (BMDO), 2-methylene-4-phenyl- 1,3-dioxolane (MPDO) and 4,7-dimethyl The structures of poly (BMDO), poly (MPDO) and poly (DMMDO) were carried out in the presence of α-bromobutyrate / CuBr / 2, 2’-bipyridine respectively ) were characterized by ~ 1H and ~ (13) C-NMR spectra. The effects of monomer structure on the behavior of atom transfer free radical ring-opening polymerization were investigated and the mechanism of controlled free radical ring-opening polymerization was discussed.