Gel growth in free radical crosslinking copolymerization: Effect of inactive gel radicals

A kinetic model is presented for the post-gelation period of free-radical crosslinking copolymerization. The model takes into account the trapped radical centers in the gel forming system. It was shown that the weight fraction of sol, W-s2 relates to the number of crosslinked units per weight-average primary molecule. epsilon, through the equation