三嵌段瓶刷状分子盘状聚集体内的微相分离

Microphase Separation within Disk Shaped Aggregates of Triblock Bottlebrushes.

作者信息

Long Meiling, Shi Yi, Zhang Ke, Chen Yongming

机构信息

Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China.

Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.

出版信息

Macromol Rapid Commun. 2016 Apr;37(7):605-9. doi: 10.1002/marc.201500686. Epub 2016 Feb 11.

DOI:10.1002/marc.201500686

PMID:26866716

Abstract

Well-defined AbBA triblock bottlebrush with poly(N,N-dimethyl acrylamide) (PAm) as A block and polyacrylate, densely grafted with poly(tert-butyl acrylate)-block-polystyrene (PBA-b-PS), as brush bB block is prepared by controlled radical polymerization and click chemistry. The triblock copolymer with a composition of PAm200 -b-b(PBA14 -b-PS47 )167 -b-PAm200 is obtained and is further transformed into PAm200 -b-b(PAA14 -b-PS47 )167 -b-PAm200 by hydrolysis of the PBA segment into poly(acrylic acid) (PAA). In a mixture of N,N-dimethylformamide (DMF) and methanol, a poor solvent of bB block, PAm200 -b-b(PAA14 -b-PS47 )167 -b-PAm200 self-assembled into disk-like platelets, which have an internal lamellar structure by further microphase-separation of PAA-b-PS branches in 2D. Moreover, Ag nanoparticles are aligned by PAA segments along the disk to form a pattern.

摘要

通过可控自由基聚合和点击化学制备了结构明确的AbBA三嵌段瓶刷聚合物，其中以聚（N，N - 二甲基丙烯酰胺）（PAm）为A嵌段，以密集接枝聚（丙烯酸叔丁酯）-嵌段-聚苯乙烯（PBA-b-PS）的聚丙烯酸酯为刷状bB嵌段。得到了组成为PAm200 -b-b（PBA14 -b-PS47 ）167 -b-PAm200的三嵌段共聚物，并通过将PBA链段水解为聚丙烯酸（PAA）进一步转化为PAm200 -b-b（PAA14 -b-PS47 ）167 -b-PAm200。在N，N - 二甲基甲酰胺（DMF）和甲醇的混合物中（bB嵌段的不良溶剂），PAm200 -b-b（PAA14 -b-PS47 ）167 -b-PAm200自组装成盘状血小板，通过PAA-b-PS支链在二维上的进一步微相分离具有内部层状结构。此外，银纳米颗粒通过PAA链段沿盘排列形成图案。