Progress in functionalization, hybridization of polyhedral oligomeric silsesquioxanes（POSS）and its application in modified epoxy resin

Polyhedral oligomeric silsesquioxanes (POSS) has a unique structure and good heat resistance. After the function- alization of POSS, a new type of organic-inorganic hybrid material with high performance can be obtained, which has potential application value in many fields. This paper reviews the related issues of the synthesis and functionalization of POSS. Many types of POSS are widely used, but the relatively expensive price limits the development scale of POSS in many fields. POSS can be used as the modifier of epoxy resin, which has obvious strengthening and toughening effects, and significantly improves the heat resistance of cured epoxy resin. However, due to the nanometer size effect of POSS, the addition amount of POSS in the resin is limited. In the future , with the cost reduction of POSS synthesis and the continuous improvement of the means to modify the resin, the application scope of POSS in the modification field of thermosetting resin will be expanded.