A generalized rate model for free radical copolymerization was proposed. It
can be applied not only to the system with the participation of charge-tra
nsfer complex (CTC), but also to the system without the participation of CT
C. The effects of equilibrium constant, total monomer concentration, home-p
ropagation parameters and reactivity ratios on free monomer, CTC, overall r
ates, and the contribution of CTC were considered in the simulation. North
equation of copolymerization rate as a special case can be derived from the
generalized model.