C_(60)Cl_n对阴离子活性聚苯乙烯和对活性聚苯乙烯-b-聚异戊二烯的偶联作用

富勒烯(Fullerene)独特的结构和性质吸引了高分子界的广泛的关注．迄今，已通过和自由基共聚、活性自由基聚合、阳离子聚合、阴离子聚合、以及配位聚合等诸多方法相结合制备出了种类繁多的富勒烯高分子衍生物，不仅如此，富勒烯家族的重要分支——富勒烯卤化物，其独特的分子结构和具有的新性质也引起了人们的重视．

COUPLING EFFECT OF C60Cln ON ANIONIC LIVING POLYSTYRENE AND ON POLYSTYRENE-b-POLYISOPRENE BLOCK COPOLYMER

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.