Figure 2.

a) Schematic representation of the lap‐shear test. Polymeric adhesives are applied between two adherents and pulled to cohesive failure. b) Load versus extension plots for b1–b4) SF–PDA blends cured with either HCl or FeCl₃ in dry conditions. b5–b8) Load versus extension plot for SF–PDA blends employing b5,b6) underwater curing, b7) underwater curing and lap shearing, and b8) underwater curing and lap shearing in basic environment. All blends were measured five times for each condition. c) Summary of lap‐shear test results for neat SF and SF–PDA polymer blends after water, acidic, and acidic Fe³⁺ curing processes at different concentrations of curing agents in dry condition (left panel) and underwater conditions (right panel).