Atom transfer radical polymerization of styrene initiated by syndiotactic polystyrene macroinitiator bromoacetylated

作者：Gao, Yong; Li, Huaming^*; Wang, Xiayu

来源：Polymer International, 2007, 56(8): 976-983.

DOI：10.1002/pi.2227

• syndiotactic polystyrene
• graft
• atom transfer radical polymerization (ATRP)
• oxidation
• hydrolysis

Atom transfer radical polymerization of styrene was conducted with bromoacetylated syndiotactic polystyrene as macroinitiator and copper bromide combined with N,N,N',N',N'-pentamethyldiethylenetrianiine as catalyst. A two-stage process has been developed to synthesize the macroinitiator. First, syndiotactic polystyrene (sPS) was functionalized in the side phenyl rings with acetyl groups using the Friedel-Crafts reaction; second, the acetyl groups were converted to bromoacetyl groups by an acid-catalyzed halogenation reaction. The initiator was found to be active in the polymerization of styrene, leading to the production of graft chains with well-defined structure. The molecular weight and molecular weight distribution of the graft chains were determined using gel permeation chromatography after cleaving from the sPS backbone using peroxide acid oxidation followed by hydrazine-catalyzed hydrolysis. The results indicated that the polymerization process was characteristic of a 'living' nature.

• 出版日期2007-8
• 单位湘潭大学