| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 105 === In this study, we use new synthetic route to prepare two alicylic dianhydrides (4arH,8acH)-decahydro-1t,4t:5c,8c-dimethanonaphthalene-2c,3c,6c,7c-tetracarboxylic-2,3:6,7-dianhydride [DNDA(xn), Exo, Endo] and (4arH,8acH)-decahydro- 1t,4t:5c,8c-dimethanonaphthalene-2t,3t,6c,7c-tetracarboxylic-2,3:6,7-dianhydride [DNDA(xx), Exo, Exo] with different steric configuration at the same time. Polyimides were prepared using these two anhydrides with various fluorine contain diamines and diisocyanates by one-step polycondensation. Polyimides derived from these two alicylic dianhydrides not only had high molecular weights, but also can be solution-cast into transparent, colorless and flexible membranes. They also exhibited excellent solubility in organic solvents and highly thermal stability.
|
|---|
