摘要
On the basis of former reports,C 60Cl n was used as a novel coupling agent to react with active polymer chains in anionic polymerization of styrene and copolymerization of styrene and isoprene initiated by n-BuLi, respectively.The UV-Vis spectra of coupling products showed that C 60Cl n was bonded to the polymer chain.The various samples were analyzed by GPC using a refractive index(RI) detector and an ultraviolet(UV) detector set at 340?nm for the absorption of C 60 and its derivatives.The results revealed that there is a new peak containing C 60 after coupling reaction between C 60Cl n and polymer chains,and the polydispersity of the coupling products is broadened,which demonstrated that coupling reaction has taken place and polymer chains are covalently bonded to the molecule of C 60Cl n.It was calculated that about two polystyrene chains are attached to a C 60Cl n molecule,and it demonstrated that two mechanisms,i.e.substitution reaction and addition reaction,have taken place simultaneously during the coupling reaction.
On the basis of former reports, C60Cln. was used as a novel coupling agent to react with active polymer chains in anionic polymerization of styrene and copolymerization of styrene and isoprene initiated by n-BuLi, respectively. The UV-Vis spectra of coupling products showed that C60Cln. was bonded to the polymer chain. The various samples were analyzed by GPC using a refractive index(RI) detector and an ultraviolet( UV) detector set at 340 nm for the absorption of C-60 and its derivatives. The results revealed that there is a new peak containing C-60 after coupling reaction between C60Cln and polymer chains, and the polydispersity of the coupling products is broadened, which demonstrated that coupling reaction has taken place and polymer chains are covalently bonded to the molecule of C60Cln. It was calculated that about two polystyrene chains are attached to a C60Cln, molecule, and it demonstrated that two mechanisms, i.e. substitution reaction and addition reaction, have taken place simultaneously during the coupling reaction.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2004年第5期749-753,共5页
Acta Polymerica Sinica
基金
国家自然科学基金资助项目 (基金号 2 0 0 740 18)
