| 摘要 |
<p>A polyimide represented by general formula (I), which has excellent processability, high mechanical strength such as bending strength and impact resistance, high thermal resistance, and excellent solubility and flexibility, wherein Ar2 represents a tetravalent organic group, Ar1 represents a divalent organic group, Ar3 represents a monovalent organic group, and said Ar2, Ar1 and Ar3 may be the same or different from each other; n and m represent comonomer ratios and each an integer of 1 to 30; X represents CH3, CH3CH2, CH3O, Cl, Br, F, CN, NO2, CF3, CF3CF2, CF3O or Ph and a plurality of X groups may be the same or different from each other; and y represents an integer of 1 to 4.</p> |
