| 摘要 |
PURPOSE: Provided are a copolymer having an excellent solubility in an organic solvent, and a high glass transition temperature in good balance, a polymer composition and a polymer light emitting device using the copolymer with high performance. CONSTITUTION: The copolymer has a polystyrene reduced number average molecular weight of 10¬3-10¬8, and comprises a repeating unit represented by formula 1, in which, R1 and R2 each independently show a hydrogen atom, alkyl group, aryl group, or monovalent heterocyclic group; R3 and R4 each independently show alkyl group, alkoxy group, alkylthio group, alkylsilyl group, alkylamino group, aryl group, aryloxy group, arylsilyl group, arylamino group, arylalkyl group, arylalkoxy group, arylalkyl silyl group, arylalkyl amino group, monovalent heterocyclic group, or cyano group; m and n each independently show an integer of 0-3; one or more kinds of repeating units represented by formula 2, in which, R5 and R6 each independently show a hydrogen atom, alkyl group, aryl group, or a monovalent heterocyclic group; either R5 or R6 is different from either R1 or R2; R7 and R8 each independently show an alkyl group, alkoxy group, alkylthio group, alkylsilyl group, alkylamino group, aryl group, aryloxy group, arylsilyl group, arylamino group, arylalkyl group, arylalkoxy group, arylalkylsilyl group, arylalkylamino group, monovalent heterocyclic group, or cyano group; k and l are each independently an integer of 0-3.
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