Neutral layer polymers, methods of manufacture thereof and articles comprising the same

摘要

Disclosed herein is a block copolymer comprising a first segment and a second segment that are covalently bonded to each other and that are chemically different from each other; where the first segment has a first surface free energy and where the second segment has a second surface free energy; and an additive copolymer; where the additive copolymer comprises a surface free energy reducing moiety where the surface free energy reducing moiety has a lower surface free energy than that of the first segment and the second segment; the additive copolymer further comprising one or more moieties having an affinity to the block copolymer; where the surface free energy reducing moiety is chemically different from the first segment and from the second segment; where the additive copolymer is not water miscible; and where the additive copolymer is not covalently bonded with the block copolymer.

主权项

1. A composition comprising:
a block copolymer comprising a first segment and a second segment that are covalently bonded to each other and that are chemically different from each other; where the first segment has a first surface free energy and where the second segment has a second surface free energy; an additive copolymer; where the additive copolymer comprises a surface free energy reducing moiety where the surface free energy reducing moiety has a lower surface free energy than that of the first segment and the second segment; the additive copolymer further comprising one or more moieties having an affinity to the block copolymer; where the surface free energy reducing moiety is chemically different from the first segment and from the second segment; where the additive copolymer is not water miscible; where the additive copolymer is not covalently bonded with the block copolymer; and where the additive copolymer is operative to form a neutral layer on a surface of the block copolymer and to facilitate formation of domains in the block copolymer that are perpendicular to a surface of a substrate that the composition is disposed on; where the surface free energy reducing moiety is covalently bonded to a segment that is chemically identical or chemically compatible with the first segment of the block copolymer, or to a segment that is chemically identical or chemically compatible with the second segment of the block copolymer; and a solvent.