Citation: Cao Cao, Shi Yan, Wu Xiaohui, Zhang Liqun. Preparation of ABA triblock copolymer assemblies through "one-pot" RAFT PISA[J]. Chinese Chemical Letters, ;2020, 31(6): 1660-1664. doi: 10.1016/j.cclet.2019.10.026 shu

Preparation of ABA triblock copolymer assemblies through "one-pot" RAFT PISA

Cao Cao ^a ,
Shi Yan ^a,*, ,
Wu Xiaohui ^a,b,**, ,
Zhang Liqun ^a,b

a.
Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China
b.
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China

^**

shiyan@mail.buct.deu.cn

wuxiaohui@mail.buct.edu.cn

Received Date: 10 August 2019
Revised Date: 22 October 2019
Accepted Date: 22 October 2019
Available Online: 24 October 2019

Figures(4)

Poly(N, N-dimethyl acrylamide)-block-poly(styrene)-block-poly(N, N-dimethyl acrylamide) (PDMAc-b-PSt-b-PDMAc) amphiphilic triblock copolymer micro/nano-objects were synthesized through reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of St mediated with poly(N, N-dimethyl acrylamide) trithiocarbonate (PDMAc-TTC-PDMAc) bi-functional macromolecular RAFT agent. It is found that the morphology of the PDMAc-b-PSt-b-PDMAc copolymer micro/nano-objects like spheres, vesicles and vesicle with hexagonally packed hollow hoops (HHHs) wall can be tuned by changing the solvent composition. In addition, vesicles with two sizes (600 nm, 264 nm) and vesicles with HHHs features were also synthesized in high solid content systems (30 wt% and 40 wt%, respectively). Besides, as compared with typical AB diblock copolymers (A is the solvophilic, stabilizer block, and B is the solvophobic block), ABA triblock copolymers tend to form higher order morphologies, such as vesicles, under similar conditions. The finding of this study provides a new and robust approach to prepare block copolymer vesicles and other higher order micelles with special structure via PISA.
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