Iterative Exponential Growth Synthesis and Assembly of Uniform Diblock Copolymers

作者：Jiang Yivan; Golder Matthew R; Nguyen Hung V T; Wang Yufeng; Zhong Mingjiang; Barnes Jonathan C; Ehrlich Deborah J C; Johnson Jeremiah A^*

来源：Journal of the American Chemical Society, 2016, 138(30): 9369-9372.

DOI：10.1021/Jacs.6b04964

Studies on the phase segregation of unimolecular block copolymers (BCPs) are limited by a lack of reliable, versatile methods for the synthesis of such polymers on the preparative scale. Herein, we describe an advancement of Iterative Exponential Growth (IEG) wherein chiral allyl-based IEG oligomers are subjected to thiol-ene reactions and converted into unimolecular BCPs. With this strategy we have synthesized uniform BCPs with molar masses up to 12.1 kDa on similar to 1 g scale. BCPs composed of decane-based side chains and either triethyleneglycol- or thioglycerol-based side chains phase segregate into hexagonal cylinder morphologies. The assembly is not driven by side-chain crystallization, but is instead the result of amorphous BCP assembly.

• 出版日期2016-8-3