The Lauritzen–Hoffman growth theory breaks the kinetics of polymer crystallization into ultimately two rates.  The model breaks down into the addition of monomers onto a growing surface.  This initial step is generally associated with the nucleation of the polymer. From there, the kinetics become the rate which the polymer grows on the surface, or the lateral growth rate, in comparison with the growth rate onto the polymer extending the chain, the secondary nucleation rate.  These two rates can result in three situations.