Well-Defined High-Molecular-Weight Polyacrylonitrile Formation via Visible-Light-Induced Metal-Free Radical Polymerization

作者：Niu, Tengfei; Jiang, Jiayu; Li, Siyuan; Ni, Bangqing; Liu, Xuemin^*; Chen, Mingqing^*

来源：Macromolecular Chemistry and Physics, 2017, 218(15): 1700169.

DOI：10.1002/macp.201700169

• copolymer
• metal-free
• photoinduce
• polyacrylonitrile
• radical polymerization

Polyacrylonitrile (PAN) with high molecular weight and low dispersity is successfully synthesized by visible-light-induced metal-free radical polymerization at room temperature. This polymerization technique uses organic dye Eosin Y as photocatalyst and benzenediazonium tetrafluoroborates as initiator. Gel permeation chromatography-multiangle laser light scattering shows the absolute molar weight of the PAN more than 1.50 x 10(5) g mol(-1) with a polydispersity index < 1.3 while MALDI-TOF MS and F-19 NMR spectroscopy indicate the F-chain-end process. The first-order kinetic behavior, molecular weight distributions shifting, and "ON/OFF" experiment results suggest this reaction may follow the atom-transfer-like radical polymerization mechanism. In addition, this new approach allows for the efficient synthesis of well-defined random copolymers.

• 出版日期2017-8
• 单位江南大学