| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel conductive polymer usable as an overcurrent protection element.SOLUTION: A copolymer comprises a repeating unit derived from thiophene-3,4-bis sulfonic acid ester represented by the specified general formula (1), and a repeating unit derived from a thiophene monomer. (In the formula, R, R, Rand Reach independently represent a hydrogen atom or a C1-C16 hydrocarbon group. In addition, Rand R, or, Rand Rmay be linked to each other to form a cyclic structure.) |
