(2428)SYNTHESIS AND PROPERTIES OF ALICYCLIC POLYIMIDES USING UNSYMMETRICAL SPIROALICYCLIC DIANHYDRIDE

摘要

Alicyclic polyimides were synthesized from three kinds of dianhydrides having common molecular formula of C10H8O6, and their physical properties including thermal, mechanical, and optical properties were evaluated. As a result, the ones made from the anhydride with spiro structure showed somewhat better properties than others in several aspects. In addition, film properties of a pair of head-to-head and random polyimides, both made from a single set of an unsymmetrical spiroalicyclic dianhydride and a diamine, showed significant difference in several points. These observation might be related to the difference in the packing density and the rigidity of the polyimide chains.