[CH:1]12[C:13](=[O:14])[O:12][C:10](=[O:11])[CH:2]1[CH:3]1[C:8](=[O:9])[O:7][C:5](=[O:6])[CH:4]12.[CH:15]1[CH:28]=[C:27]2[C:18]([CH:19]=[C:20]3[C:25](=[CH:26]2)[CH:24]=[CH:23][C:22]([CH2:29][CH2:30][CH2:31][C:32]([OH:34])=[O:33])=[CH:21]3)=[CH:17][CH:16]=1>CN1C(=O)CCC1>[CH:2]12[C:10](=[O:11])[O:12][C:13](=[O:14])[CH:1]1[CH:4]1[C:5](=[O:6])[O:7][C:8](=[O:9])[CH:3]12.[CH:15]1[CH:28]=[C:27]2[C:18]([CH:19]=[C:20]3[C:25](=[CH:26]2)[CH:24]=[CH:23][C:22]([CH2:29][CH2:30][CH2:31][C:32]([OH:34])=[O:33])=[CH:21]3)=[CH:17][CH:16]=119.22 g (0.098 mol) of CBDA, 9.77 g (0.08 mol) of 4-ABA and 5.85 g (0.02 mol) of DADOB were reacted in 197 g of NMP at room temperature for 5 hours to prepare a polyamic acid solution. The polymerization reaction proceeded easily and uniformly, and the molecular weights were measured in the same manner as in Preparation Example 1 and as a result, a solution of a polyamic acid having a number average molecular weight of 13,557 and a weight average molecular weight of 26,993 was obtained.
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