刚柔嵌段共聚物PFH-b-PDMAEMA的可控制备与荧光性能研究  

Study of Controlled Polymerization and Fluorescence Property of Rod-coil Block Copolymers PFH-b-PDMAEMA

作　　者：李杰 周密 

机构地区：[1]浙江工业大学材料科学与工程学院,杭州310014

出　　处：《科技通报》2017年第12期25-29,43,共6页Bulletin of Science and Technology

摘　　要：结合可控Suzuki偶联聚合与原子转移自由基聚合(ATRP)的"双可控"法制备刚柔嵌段共聚物聚9,9-二己基芴-b-聚甲基丙烯酸N,N-二甲氨基乙酯(PFH-b-PDMAEMA)。研究显示,以可控Suzuki偶联聚合得到的PFH分子量较高且分子量分布(PDI)较窄,并且以端基修饰的聚芴(PFH-Br)为大分子引发剂的ATRP成功聚合得到结构明确且PDI较低的PFH-b-PDMAEMA,该聚合反应符合活性聚合特征,可控性良好。对PFH-b-PDMAEMA在四氢呋喃溶液中的荧光性能进行了初步研究。结果发现,荧光性能主要受PFH嵌段决定,并且共聚物在一定浓度范围内存在聚集荧光猝灭现象。因此,要获得高强度的荧光性能,需要选择合适的浓度范围。The rod-coil block copolymers poly[2,7-(9,9-dihexyl-fuorene)]-b-poly[2-(dimethylamino)ethyl methacrylate](PFH-b-PDMAEMA) were synthesized by"double controlled"method of combining controlled suzuki cross-coupling and atom transfer radical polymerization(ATRP). It was found that the PFH with high molecular weight and narrow polydispersity index(PDI) has been prepared by controlled suzuki cross-coupling. And the PFH-Br was found to be efficient macromolecular initiator for preparing the well-defined PFH-b-PDMAEMA with narrow PDI as controlled living ATRP. The fluorescence property of PFH-b-PDMAEMA in THF has been researched. The results showed fluorescence property of copolymers was mainly controlled by PFH block and the aggregation induced fluorescence decrease happened in THF solution. Thus, it's necessary to choose suitable concentrate of solution for high intensity of fluorescence.

关 键 词：刚柔嵌段共聚物 聚芴 可控聚合 荧光 

分 类 号：O621.2[理学—有机化学]