Miktoarm Star Copolymers from the Chemical Stitching of Associating Block Copolymers

作者：Dou, Hongjing; Hong, Liangzhi; Liu, Guojun^*

来源：Macromolecules, 2010, 43(10): 4629-4637.

DOI：10.1021/ma100511e

• Ammonium ions
• Bearing block
• Carboxyl groups
• Miktoarm star copolymers
• Poly (tert-butyl acrylate)
• Total yield

A new method for the synthesis of miktoarm star copolymers is proposed. To demonstrate its viability, diblock copolymers, PA-b-PSCOOH, with a carboxyl-bearing short PSCOOH block, and triblock copolymers. PB-b-PNH(2)-b-PB, with an amino-bearinu short PNH(2) block, were synthesized and characterized. Here PA and PB denote poly(teo-butyl acrylate) and poly(methyl methacrylate), respectively. The carboxyl- and amino-bearing blocks of the copolymers associated with one another due to carboxylate and ammonium ion pairing in dichloromethane. The addition of a coupling agent caused the amino and carboxyl groups to amidize and resulted in the fusion of the associating chains, thus producing miktoarm copolymers mu-(PA)(1)(PB)(2) and mu-(PA)(1)(PB)(2). Factors affecting the relative and total yields of mu-(PA)(1)(PB)(2) and mu-(PA)(1)(PB)(2) formation were investigated.

• 出版日期2010-5-25