Unlike typical glassy nodules that are permanent at room temperature, the reversible hydrogen bonds can break and reform, slowing down the dynamics of polymer networks. As the fraction of associative groups increases, the relaxation time of the network strand increases. This effect is evident in the reduction of the crossover frequency 𝜔 𝑐 , below which G' becomes nearly a constant and higher than 𝐺′′, as denoted by the arrow in Fig. and shown in Fig. . To quantify the contribution of reversible bonds to the network stiffness, we introduce a parameter, (𝐺′ -𝐺 𝑥 ′ )/𝐺 𝑥 ′ , in which 𝐺 𝑥 ′ is the shear storage modulus for the network without reversible bonds. As expected, (𝐺′ -𝐺 𝑥 ′ )/𝐺 𝑥 ′ becomes higher as 𝜆 increases from 0.09 to 0.25 because of the contribution from reversible bonds. Interestingly, the value of (𝐺′ -𝐺 𝑥 ′ )/𝐺 𝑥 ′ exhibits a non-monotonic dependence on the probing frequency (Fig. ). This behavior is characteristic of reversible polymer networks, in which the fraction of unrelaxed reversible bonds increases at higher frequency or shorter probing time scales. This trend ends at time scales shorter than the lifetime of a reversible association, as the contribution from reversible bonds to network modulus is maximized and exhausted. Surprisingly, when 𝜆 increases from 0.09 to 0.25, the extent of the increase for (𝐺′ -𝐺 𝑥 ′ )/𝐺 𝑥 ′ with frequency remains the same up to 𝜔 𝑚𝑎𝑥 , at which (𝐺′ -𝐺 𝑥 ′ )/𝐺 𝑥 ′ is maximized, as shown by the two nearly parallel curves in Fig. . This behavior is attributed to the similar relaxation dynamics of the associative polymers despite different fractions of reversible groups. Because the two polymers carry high fractions of associative groups that are no less than one per Kuhn monomer, they can be considered as a homopolymer consisting of renormalized Kuhn monomers . Thus, all polymers follow the same Rouse dynamics, and the only difference is that the basic time scale -the relaxation time of a renormalized Kuhn monomer 𝜏 𝑠 -increases with 𝜆 . Recently we experimentally showed that at room temperature 𝜏 𝑠 increases exponentially with the fraction of associative groups: 𝜏 𝑠 = 𝜏 0 exp(𝛼𝜆) , in which 𝜏 0 is the monomer relaxation time without associative groups, and 𝛼 is a constant of 8.6±1.2. It is expected that the Rouse dynamics of a polymer with 𝜆 reversible groups slow down by a factor of exp(𝛼𝜆) . Consistent with this understanding, the crossover frequency 𝜔 𝑐 inversely scales with the monomer relaxation time: