Visible-light-mediated, additive-free, and open-to-air controlled radical polymerization of acrylates and acrylamides.

ABSTRACT: Oxygen tolerance in ontrolled radical polymerizations has been an active field of study in recent years. Herein, we report a photocontrolled, additive-free iniferter polymerization that operates in completely open vials utilizing the "polymerizing through oxygen" mechanism. Trithiocarbonates are directly activated with high intensity 450 nm light to produce narrowly dispersed (M _w/M _n = 1.1-1.6) polyacrylates and polyacrylamides in only 1 hour of irradiation. Living behavior is demonstrated through chain extension, block copolymer synthesis, and control over molecular weight through varying the monomer:iniferter ratio. A slight increase in induction period is observed for the open vial polymerization compared to the air-free reaction, but polymers with s

SUBMITTER: Lamb JR 

PROVIDER: S-EPMC6497412 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature