3FRECHET J M J, HENMI M, GITSOV I. Self-condensing vinyl polymerization: an approach to dendritic materials [ J]. Science, 1995,269(5 227) : 1 080-1 083.
4TUNG L H,HU An-ring,MCKINLEY S V,et al. Prepara- tion of polystyrene with long chain branches via free radical polymerization [ J ]. J. Polym. Sci. : Polym. Chem. Ed. ,1981,19(8) :2 027-2 039.
5GRAHAM S,RANNARD S P,CORMACK P A G,et al. One-pot synthesis of methacry|ic acid-ethylene oxide branched block and graft copolymers [ J ]. J. Mater. Chem. , 2007,17 ( 6 ) :545 -552.
6LIU Jian-hua, ZHU Xian-yang, SHI Wen-fang, et al. Branched polymer via free radical polymerization of chain transfer monomer: a theoretical and experimental investi- gation [ J ]. J. Polym. Sci. , Part A: Polym. Chem. , 2008, 46(4) :1 449-1 459.