for Langevin chains. Notice that by Taylor-expanding the right-hand side of last equation around α = 0, Gaussian expression in Eq. ( ) is recovered at first order. In Fig. , we plot a representative case of the gel pressure contribution π g with both Gaussian (blue continuous line) and Langevin (red continuous line) models for different swelling ratios α. The common contribution π 0 from Eq. ( ) is depicted with dashed gray line, while the elastic contributions π elas for Gaussian, Eq. ( ), and Langevin, Eq. ( ), models are depicted in dashed blue and dashed red lines, respectively. We observe that both models present similar behavior at small α: For α → 1, namely a → a 0 , the gel osmotic pressure diverges, while it is monotonically increasing with increasing α. For α such that R e → R max , π elas for the Langevin model diverges since the chains approach their maximum elongation. Notice that for α such that β π g = 0, we obtain the equilibrium microgel size for neutral case, with Gaussian model predicting larger equilibrium size than the Langevin case. We also see that the total gel pressure π g is dominated by π 0 contribution for α ≈ 1, and by π elas otherwise. This holds particularly for short chains, with N in the order of tens of monomers. With increasing N, |π elas | decreases, with π 0 becoming the dominant contribution in the limit N → ∞ (see Fig. ). Moreover, in this limit, the elastic contribution from Langevin model tends to the contribution from Gaussian model π elas,L → π elas,G , as seen in the inset of Fig. .