结构可控PBMA-b-PSt嵌段共聚物的合成及结构表征

Synthesis and characterization of controlled PBMA-b-PSt block copolymers

原子转移自由基聚合 (ATRP)方法是一种新发展起来的可控 /“活性”自由基聚合方法 ,在合成结构可控共聚物过程中具有广泛应用 .采用二步加料方式的ATRP方法合成了一系列具有可控结构的PBMA b PSt嵌段共聚物 ,聚合物的分子量分布小于 1 5 ,分子量可简单地通过改变反应投料单体 /引发剂比及控制单体转化率得到调控 ,同时对嵌段共聚物的结构进行了IR ,1H NMR ,GPC ,DSC表征 ,确证了其结构 .结果表明 ,所合成的嵌段共聚物具有PBMA b PSt─X和PSt b

Atom transfer radical polymerization (ATRP) is a new effective method to prepare controlled block copolymers. In this test, a series of well-defined PBMA-b-PSt block copolymers are synthesized by the method of ATRP.The polydispersity of resulting polymer is<1.5, and the molecular mass can be tailored by changing the ratio of / and by controlling the monomer conversion. The structures of the testing products are characterized and confirmed with IR, 1H-NMR, GPC and DSC.