| 摘要 |
Provided is a decomposition method of an aromatic block copolymer, wherein the aromatic block copolymer comprises a segment 1 represented by the following general formula (1) and a segment 2 comprising a structural unit represented by the following general formula (2) and/or a structural unit represented by the following general formula (3), and the segment 2 is subjected to chemical decomposition. (wherein m represents an integer of 5 or more, Ar1 represents a divalent aromatic group that may have a substituent, and Ar1s of 5 or more may be the same as or different from each other,) <?in-line-formulae description="In-line Formulae" end="lead"?>Ar10-X10 (2)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>Ar20-Y20-Ar21-X20 (3)<?in-line-formulae description="In-line Formulae" end="tail"?> (wherein Ar10, Ar20 and Ar21 each independently represent a divalent aromatic group that may have a substituent, X10 and X20 each independently represent an oxygen atom, a sulfur atom, an alkylene group having 1 to 10 carbon atoms or a fluorine-substituted alkylene group having 1 to 10 carbon atoms, and Y20 represents a sulfonyl group, a carbonyl group or a fluorine-substituted alkylene group having 1 to 20 carbon atoms).
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