Master equation chain scission

In the master Equation [3.7], monomers and oligomers have been treated together as short chains. Here the concentrations of monomers and oligomers are followed separately. In principle, both end and random scissions produce monomers. However, the monomer production rate by random scission is much smaller than that by end scission. Using to represent the concentration of monomers, it is assumed that only end scissions produce monomers, and we have... 

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