abstract |
The present invention relates to a novel block copolymer of structure 1. Where A- is a block polymer chain, B- is a block polymer chain, A- and B- are chemically different covalently bonded polymer chains, which are phase separable, and the moiety X (Y (Z) b ) a is a linking group, which is a surface active Including a pendant part Y (Z) b , a is an integer from 1 to 4 and represents the number of surface active pendant moieties Y (Z) b on X; b is an integer of 1 to 5 and represents the number of Z portions on the link portion Y; X is a linking group between the A polymer block, the B polymer block and the moiety Y; Y is a linking group or a direct valence bond between X and Z; and Z is independent of a fluorine-containing moiety, a Si 1 -Si 8 siloxane-containing moiety, or a hydrocarbon moiety having at least 18 carbons. And the linking group X (Y (Z) b ) a has a surface energy less than that of block A and less than that of block B. The invention also relates to a composition comprising the novel copolymer and its use in an induced self-assembly process. |