Synthesis of Shape Memory Polyurethanes with Pendant AzobenzeneGroups and Evaluation of Their Mechanical Properties

This study focuses on the synthesis of N,N-dihydroxyethyl azobenzene (Azo-OH) through an azocouplingreaction. Polyurethane samples were synthesized using Azo-OH and ۱,۴-butanediol as thechain extenders. The chemical structure of the polyurethanes was confirmed using Fourier transforminfrared (FTIR) spectroscopy. Additionally, the mechanical study was performed to accuratelymeasure Young's modulus, tensile strength, and elongation at break of the polyurethane samples. Theaddition of the azobenzene group as a pendant chain extender in the structure of polyurethane has asignificant effect on the mechanical properties of this polymer. This alteration leads to a significantenhancement in the overall mechanical properties, thereby expanding the potential application rangeof polyurethane.

کلیدواژه ها:

Pendant azobenzene ، Polyurethane ، Mechanical properties ، Chain extender