Iterative Exponential Growth Synthesis and Assembly of Uniform Diblock Copolymers

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• 作者：Yivan Jiang ; Matthew R. Golder ; Hung V.-T. Nguyen ; Yufeng Wang ; Mingjiang Zhong ; Jonathan C. Barnes ; Deborah J. C. Ehrlich ; Jeremiah A. Johnson
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：August 3, 2016
• 年：2016
• 卷：138
• 期：30
• 页码：9369-9372
• 全文大小：406K
• 年卷期：0
• ISSN：1520-5126

文摘

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 ∼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.