超支化刷型共聚物HPCMS-g-PVBC-g-PBMA的制备及表征

Preparation and Characterization of Hyperbranched Brush Copolymer HPCMS-g-PVBC-g-PBMA

首先通过对氯甲基苯乙烯(VBC)的自引发原子转移自由基聚合(ATRP)得到超支化的聚氯甲基苯乙烯(HPCMS)。然后通过化学修饰的方法在HPCMS的表面引入多个双硫酯基团形成大分子链转移剂(HPCMS-CTA)。进而通过可逆加成断裂链转移聚合(RAFT)制备了超支化多臂接枝聚合物(HPCMS-g-PVBC-CTA),最后以PVBC链段上的苄基氯作为引发活性点,通过ATRP方法制备了超支化刷型共聚物HPCMS-g-PVBC-g-PBMA。

Firstly, hyperbranched polychloromethylstyrene(HPCMS)was obtained by self-initiated atom transfer radical polymerization(ATRP)of p-chloromethylstyrene(VBC).Then, multiple dithioester groups were introduced on the surface of HPCMS to form a macromolecular chain transfer agent(HPCMS-CTA).Furthermore, a hyperbranched multi-arm graft polymer(HPCMS-g-PVBC-CTA)was prepared from VBC by reversible addition fragmentation chain transfer polymerization(RAFT).Finally, with the benzyl chloride on the PVBC segment as the trigger site, the hyperbranched brush copolymer HPCMS-g-PVBC-g-PBMA was prepared from butyl methacrylate(BMA)by the ATRP method.