
TY  - JOUR
A1  - Pyun, Jeffrey 
A1  - Rees, Ian 
A1  - Fréchet, Jean M. J. 
A1  - Hawker, Craig J. 
T1  - Evaluating the Effect of Termination by Chain&#8211;Chain Coupling in Living Free-Radical Polymerizations
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2003
VL  - 56
IS  - 8
SP  - 775
EP  - 782
KW  - 
UR  - https://doi.org/10.1071/CH03041 
N2  - 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&#8211;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&#8211;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&#8211;chain coupling to be determined since the inclusion of pyrene into the star structure is a direct result of termination by radical coupling. 
ER  -

