| 초록 |
Nowadays, aromatic polyimides (PIs) have received wide attention due to their outstanding characteristics such as good thermal stability, excellent mechanical properties, and dielectric property in the field of high performance polymer. Also much research effort has been devoted to developing performance to make it better using hybridization technology. Ladder-like silsesquioxane(LPS) belongs to the hybrid material which have comprised double-strand structure of Si-O-Si units synthesized by the simple sol-gel process under nitrogen. In this study, 4,4'-oxydianiline(ODA) and 4,4'-(hexafluoroisopropylidene)diphthalic anhydride(6FDA) were initially reacted to make poly(amic acid). And then, poly(amic acid) was reacted with LPS with different ratio of organic group. Characteristics of PI containing LPS were analyzed by various analytical tools. This was supported by Korea National University of Transportation in 2018. |
