Facile Control of Molecular Weight Distribution via Droplet‐Flow Light‐Driven Reversible‐Deactivation Radical Polymerization†. Issue 19 (26th July 2022)

• Record Type: Journal Article
• Authors: Zhou, Yang; Fu, Yangkang; Chen, Mao
• Is Part Of: Chinese journal of chemistry. Volume 40:Issue 19(2022)
• Page Start: 2305
• Page End: 2312
• Publication Date: 2022-07-26
• Subjects: Photocatalysis -- Copolymerization -- Synthetic methods -- Molecular weight distribution -- Flow chemistry; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.202200236
• Languages: English
• ISSNs: 1001-604X

Abstract

Comprehensive Summary: Molecular weight distribution (MWD) is fundamental for polymer analysis, which influences many important properties of polymeric materials. In this work, we demonstrate the development of a computer‐aided droplet‐flow system that combines photo‐mediated reversible‐deactivation radical polymerization (RDRP) and chain transfer agent (CTA) diffusion strategy to enable facile MWD control for the first time. Synthetic advantages of this photo‐flow polymerization allow controlled chain‐growth to yield a variety of polymers of tunable MWDs in a broad range ( Ð ≈ 1.1—1.9) with predetermined molecular weights ( M n ≈ 4—30 kDa) and good chain‐end fidelity. Notably, the computer‐aided platform has streamlined an automatic and high‐throughput pathway to prepare polymer libraries of tunable MWDs. For copolymers, chemical compositions could be readily regulated besides MWDs with the droplet‐flow platform. We believe that this work should be attractive for polymer engineering, and informative to create more flow polymerization techniques toward on‐demand control of diverse polymer characters. Abstract : This work reports the development of a computer‐aided droplet‐flow polymerization for tailoring molecular weight distribution without losing merits of controlled chain‐growth, facilitating high‐throughput, automated synthesis of homopolymer and copolymer libraries of tunable dispersities.