Abstract
A novel approach based on the reaction of multifunctional star polymers with chromophore-labelled linear polymers is presented for evaluating the extent of termination by chain-chain coupling during living free-radical polymerizations. A mixed initiating system consisting of an unlabelled, multifunctional initiator and an excess of a monofunctional alkoxyamine initiator containing a chromophore, such as pyrene, is used to initiate the living polymerization of vinyl monomers leading to a mixture of star and linear polymers. The occurrence of chain-chain coupling is readily identified and quantified by isolating the star polymer that is obtained and elucidating the level of incorporation of pyrene units by UV/vis spectroscopy. This allows the level of chain-chain coupling to be determined since the inclusion of pyrene into the star structure is a direct result of termination by radical coupling.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 775-782 |
| Number of pages | 8 |
| Journal | Australian Journal of Chemistry |
| Volume | 56 |
| Issue number | 8 |
| DOIs | |
| State | Published - 2003 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Chemistry