Authors: J. Kim, Z. Chen, B. Chisholm and S. Patel
Affilation: North Dakota State University, United States
Pages: 936 - 939
Keywords: hyperbranched, UV, nanoindentation, modulus, hardness
Hyperbranched polymers were explored to develop UV-curable,protective coatings for aluminum 2024-T3 and their viscoelastic andmechanical properties were characterized using nanoindentationtechniques. The coating system consists of a hyperbranched polyesteracrylate (CN2300, Sartomer Inc), a modified hyperbranched polyols,and a photoinitiator (Irgacure 2022). Two different hyperbranchedpolyols (DPP130 and P1000, Perstorp Polyols Inc.) were partiallymodified with acryloyl chloride to give acrylate functionality for UVcuring. The quasi-static indentation results showed that the reducedmodulus and hardness of the UV-cured coatings were significantlyaffected by the type and amount of the modified polyols.