Reducing Side Reactions: 4-Dimethylaminopyridine (DMAP) in Controlled Polyurethane Crosslinking Abstract: Polyurethane (PU) materials are widely used in various industries due to their versatile properties. However, uncontrolled crosslinking during PU synthesis can lead to undesirable side reactions, affecting the final product’s performance. 4-Dimethylaminopyridine (DMAP), a highly effective nucleophilic catalyst, offers a promising approach to control PU...