Platinum(II)-containing associative metallopolymers can self-assemble into dynamic gel networks through Pt(II)⋯Pt(II) and/or π–π stacking interactions. Above the gel–sol transition point, the stress relaxation contributed by the Rouse-type motion of the unentangled polystyrenes (τ₀) and the sticker dissociation of the platinum(II) units (τ_s) can be simultaneously observed over the timescale of linear viscoelasticity, quantifying Pt(II)⋯Pt(II) and/or π–π stacking interactions using the ratio of τ_s/τ₀.