MMA-DMAEMA两亲嵌段共聚物的合成

Synthesis and Characterization of Amphiphilic MMA - DMAEMA Diblock Copolymers

在室温下,采用苄醇钾(BzOK)作引发剂通过氧阴离子聚合方法合成了相对分子质量、嵌段组成均可控且相对分子质量分布窄的两亲嵌段共聚物BzO-MMA-DMAEMA和BzO-MMA-DMAEMA.用1HNMR、FTIR、GPC对共聚物进行表征.比较不同加料次序所获得的嵌段共聚物,发现相同'单体/引发剂'条件下,共聚物的组成完全一致,从而证明MMA和DMAEMA的氧阴离子聚合反应体系均为活性聚合.

The different monomer - addition sequence yielded two amphiphilic diblock copolymers, BzO - MM A -DMAEMA and BzO - DMAEMA - MMA, which were synthesized by using potassium benzyl alcoholate as initiator via oxyan-ion - initiated polymerization. The copolymers were characterized by 1H NMR, FTIR, and GPC. The results showed that the polymers are of diblock copolymer. Compared two kinds of diblock copolymers, their compositions are identical under the same monomer to initiator ratio. This new discovery expanded monomers available for oxyanionic polymerization, and obtained an evidence of the living/control polymerization for oxyanion - initiated polymerization.