Calculation of Average Chain Length

The classical theory of Flory-Stockmeyer [60-62] (FS) provides the basis for caiculation of the molecular size distribution of crosslinked polymer molecules holding an arbitrary initial size distribution. Let us consider an original set of polymer molecules (known as primary chains). The initial weight fraction of these primary chains, will be simply given by 

The number and weight-average chain lengths will be given by Equations 9.A.2 and 9.A.3, respectively  

Strictly speaking, the weight-average chain length is given by (1 + o) / [l - (P p - l)]. However, 

The physical meaning of Equation 9.A.9 is that an incipient polymer network will come up when, in a weight 

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