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将活性负离子聚合与原子转移自由基聚合(ATRP)技术相结合,运用机理转移法制备了一种两亲性材料聚丁二烯-b-聚(甲基丙烯酸N,N-二甲氨基乙酯)(PB-b-PDMAEMA)嵌段共聚物.首先通过负离子聚合方法设计合成聚丁二烯,用环氧丙烷封端,2-溴异丁酰溴作酯化剂,合成具有活性端基溴的聚丁二烯大分子引发剂(PB-B r),再用其引发亲水性单体DMAEMA进行原子转移自由基聚合,聚合动力学证实了该聚合反应具有典型的活性/可控自由基聚合的特征.通过差示扫描量热法(DSC)研究嵌段共聚物的微相分离行为.制备的大分子引发剂及两亲性嵌段共聚物经凝胶色谱、红外和核磁表征证实了预定的结构.
The living anionic polymerization and atom transfer radical polymerization (ATRP) technology combined with the use of mechanism transfer method to prepare an amphipathic material polybutadiene-b-poly (N, N-dimethylaminoethyl methacrylate ) (PB-b-PDMAEMA) block copolymer.At first, polybutadiene was synthesized by anionic polymerization method, blocked with propylene oxide and 2-bromoisobutyryl bromide as esterification agent to synthesize poly Of polybutadiene macromolecular initiator (PB-B r), and then use it to initiate the hydrophilic monomer DMAEMA atom transfer radical polymerization, polymerization kinetics confirmed that the polymerization reaction has a typical activity / controlled radical The characteristics of polymerization were investigated by differential scanning calorimetry (DSC). The macromolecular initiators and amphiphilic block copolymers were characterized by gel chromatography, IR and NMR Scheduled structure.