Scratch studies of POSS containing polyurethane nano hybrid coatings

Organic-inorganic polyurethane coatings were prepared using two polyester resins and two polyhedral Oligomeric Silsesquioxane (POSS). The effect of hydroxyl content and POSS functionality were studied on hardness and scratch resistance. The results showed that intrinsic hardness of POSS affected the crosslink density by increasing the free volume. This lead to improved scratch resistance of POSS/PU Hybrid coatings. This behavior was very much dependent on the hydroxyl percent of polyol

کلیدواژه ها:

Hybrid coatings ، Polyurethane ، POSS ، Scratch