Gel point, critical

Solid lines (—) Eq. (102). (O) classical gel points ( ) critical dilution Experimental... 

For g > g> the mean-field theory describes the crosslinking eaction. For Isj < g, (sufficiently close to the gel point), critical percolation describes the actual transition. For very long precursor chains, sq is extremely small and the entire experimentally accessible region of crosslinking is described by mean-field percolation (in practice Ng s 100 is sufficient). The limit of Ao = 1 is polymerization of monomers with functionality greater than 2, and all extents of reaction in the range - 1 < e < 1 are described by critical percolation. 

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