Journal
POLYMER CHEMISTRY
Volume 4, Issue 3, Pages 637-644Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2py20667f
Keywords
-
Categories
Funding
- National Nature Science Foundation of China [21174094, 20904036]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- Nature Science Key Basic Research of Jiangsu Province for Higher Education [12KJA150007]
- Program of Innovative Research Team of Soochow University, Jiangsu Overseas Research & Training Program for University Prominent Young and Middle-aged Teachers and Presidents
- NSF [CHE-1012636]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1012636] Funding Source: National Science Foundation
Ask authors/readers for more resources
This work describes a facile removal/modification of thiocarbonylthio end groups of RAFT-made polymers by the utilization of zero-valent copper (Cu(0)) powder/2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) under mild conditions, especially for poly(methyl methacrylate) (PMMA). At [PMMA](0)/[Cu(0)](0)/[ligand](0)/[TEMPO](0) = 1/5/5/1.5, the molecular weights (MWs) gradually increased to twofold that of the precursor, due to the polymeric radical-polymeric radical cross coupling. While the MW remained unchanged at [PMMA](0)/[Cu(0)](0)/[ligand](0)/[TEMPO](0) - 1/5/5/5, generating vinyl group terminated telechelic polymers via a polymeric radical-TEMPO disproportionation process. The utilization of Cu(0) wire can also remove the thiocarbonylthio end group effectively. Zero-valent iron (Fe(0)) (powder or wire) can be applied to remove/modify the thiocarbonylthio end group instead of Cu(0)/ligand with comparable results. This work provided an alternative and promising approach for an adjustable end group removal/modification of RAFT polymers, and would eventually strengthen and facilitate the potential large-scale application of RAFT-related polymers.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available