| abstract |
A polymer comprising a structural unit represented by the formula (I): wherein R1 represents a hydrogen atom or a methyl group, R2 is independently in each occurrence a linear or branched chain C1-C6 alkyl group, k represents an integer of 0 to 4, X represents a linear or branched chain C1-C6 alkylene group, Z represents a 2-adamantyl group which may have one or more substituents, and a structural unit represented by the formula (II): wherein R4 represents a hydrogen atom or a methyl group, R5 is independently in each occurrence a linear or branched chain C1-C6 alkyl group and n represents an integer of 0 to 4. |