Figure 2.

Left: Solution curves W(t, z) at selected times for model in which gel reacts only with sol (χ = 1): At t = 0 (blue dashed), for t < t_g (red), for t = t_g (black), and for t > t_g (blue). W(t, 1) for t > t_g (blue star). Right: For χ = 1, reactive sites in sol R_s (blue) and in gel R_g (red). Mass in sol θ_s (blue-dashed) and in gel θ_g (red-stars). f = 3, $c_1(0)=m_0=\frac{2}{3},t_g=\frac{1}{2}$.