摘要 |
Provided are a polymer derived from: a polyamic acid comprising a polyamic acid comprising repeating units represented by chemical formulas 1 and 2, a copolymer thereof, or a blend thereof; a polyimide comprising a polyimide comprising repeating units represented by chemical formulas 3 and 4, a copolymer thereof, or a blend thereof; or a combination thereof, a preparation method thereof, and a molded product comprising the same. |