Mechanism and control of chain extension of non-ionic waterborne polyurethane by amine

Key Points

• Chain extension of non-ionic polyurethane is effectively controlled using amine, enhancing material properties.
• The process involves polyaddition reactions that modify the polymer structure for waterborne applications.
• Experimental methods were utilized to assess the influence of different amines on the chain length and properties of the polyurethane.
• Understanding these mechanisms may enable the development of advanced waterborne coatings with better performance.