BLOCK COPOLYMERS

摘要

The invention provides block copolymers which can form micro- phase separation structure in spite of their having small molecular weights and which can form microphase separation structure of small domain sizes. A block copolymer which is represented by the formula: A - C - B (wherein A is a segment consisting of a homopolymer or a random or block copolymer which is composed of at least one kind of repeating units represented by the general formula (II): B is a segment consisting of a homopolymer or a random or block copolymer which is composed of at least one kind of repeating units represented by the general formula (III): C is A, B, or A-B, with the proviso that at least one of the segments A has water-repellent groups or at least one of the segments B has polar groups) and which has a mass-average molecular weight of 50,000 or below and can form microphase separation structure.