Get access

Radical Polymerization: Reversing the Irreversible?


  • C.B.-K. acknowledges funding from the Karlsruhe Institute of Technology (KIT) in the context of the Excellence Initiative for leading German universities.


original image

Reverse gear: Additions of primary radicals to sterically non-congested vinyl bonds may indeed not be as irreversible as commonly assumed. A 1H-CIDNP NMR spectroscopic investigation on photoinitiated polymerization systems provides evidence that the addition of photolytically generated mesitoyl and phosphinoyl radicals to (meth)acrylate monomers at ambient temperatures may be reversible (see scheme; I=initiator).