苯乙烯-甲基丙烯酸叔丁酯嵌段共聚物的合成与表征

Synthesis and Characterization of Polystyrene-Poly(Tert-Butyl Methacrylate) Block Coploymer

在 10℃下 ,采用阴离子聚合方法合成相对分子质量、嵌段组成均可控且相对分子质量分布窄的苯乙烯 -甲基丙烯酸叔丁酯嵌段共聚物 ,对所得共聚物进行了IR、NMR、TG、TEM等表征 。

The diblock copolymer of styrene and tert-butyl methacrylate was synthesized by anionic polymerization at 10 ℃.The polymerization was carried out in the mixed solvent of V(toluene)/V(THF)=9/1,with n-BuLi as initiator and DPE as capping agent.The copolymer was characterized by GPC,IR,NMR,TG and TEM.The results showed that the copolymer is of block structure.The molecular weight and bolck ratio of the product can be well controlled,and a narrow molecular weight distribution(<1.15) is obtained.The results of TEM demonstrate that the micromorphology of the above-mentioned diblock copolymer has two-phase separation characteristics.