Jump to main content
Jump to site search

Issue 11, 2017
Previous Article Next Article

Investigation into the mechanism of photo-mediated RAFT polymerization involving the reversible photolysis of the chain-transfer agent

Author affiliations

Abstract

A new dithiocarbamate with a N-carbazole Z group is synthesized and investigated as a chain-transfer agent (CTA) in a photo-mediated RAFT polymerization mechanism involving its partial and reversible photolysis. Excellent control of the polymerization of butyl acrylate is observed using LEDs as light sources emitting either in the blue or green wavelength domain. As a photo-mediated reversible deactivation radical polymerization (RDRP) mechanism, the polymerization can be easily stopped or reinitiated by simply switching off or on the light source. This behavior is exploited for subsequent chain-extensions of macroCTAs. A simple kinetic modeling is then proposed, which can support the trends observed experimentally, such as the effects of light intensity and wavelength on the apparent polymerization rate. The developed equation suggests also ways to improve the control of the polymerization by playing on the photolysis pseudo-equilibrium, while underlying the importance of the quantum yield of photodissociation of the CTA.

Graphical abstract: Investigation into the mechanism of photo-mediated RAFT polymerization involving the reversible photolysis of the chain-transfer agent

Back to tab navigation

Supplementary files

Article information


Submitted
23 Dec 2016
Accepted
27 Jan 2017
First published
30 Jan 2017

Polym. Chem., 2017,8, 1760-1770
Article type
Paper

Investigation into the mechanism of photo-mediated RAFT polymerization involving the reversible photolysis of the chain-transfer agent

B. Cabannes-Boué, Q. Yang, J. Lalevée, F. Morlet-Savary and J. Poly, Polym. Chem., 2017, 8, 1760
DOI: 10.1039/C6PY02220K

Social activity

Search articles by author

Spotlight

Advertisements